Sunday, 31 January 2016

IBPS SO Database Digest – IT officer Database Multiple Choice Question and answers

Dear readers- In this article we are presenting latest and updated asked databse IBPS SO Database Digest – IT officer Database Multiple Choice Question and answers for you upcoming bank exam. These questions and answers are asked in various previous exam conducted by ibps asked questions. Today's every govt jobs in India required computer knowledge so must for every aspirants. Our Computer knowledge quiz is most important for all competitive exams.

IBPS SO Database Digest – IT officer Database Multiple Choice Question and answers

Part-1
1. DBMS is a collection of ………….. that enables user to create and maintain a database.

A) Keys

B) Translators

C) Program

D) Language Activity



2. In a relational schema, each tuple is divided into fields called

A) Relations

B) Domains

C) Queries

D) All of the above


3. In an ER model, ……………. is described in the database by storing its data.

A) Entity

B) Attribute

C) Relationship

D) Notation


4. DFD stands for

A) Data Flow Document

B) Data File Diagram

C) Data Flow Diagram

D) Non of the above


5. A top-to-bottom relationship among the items in a database is established by a

A) Hierarchical schema

B) Network schema

C) Relational Schema

D) All of the above


6. ……………… table store information about database or about the system.

A) SQL

B) Nested

C) System

D) None of these


7. …………..defines the structure of a relation which consists of a fixed set of attribute-domain pairs.

A) Instance

B) Schema

c) Program

D) Super Key


8. ……………… clause is an additional filter that is applied to the result.

A) Select

B) Group-by

C) Having

D) Order by


9. A logical schema

A) is the entire database

B) is a standard way of organizing information into accessible parts.

C) Describes how data is actually stored on disk.

D) All of the above


10. ………………… is a full form of SQL.

A) Standard query language

B) Sequential query language

C) Structured query language

D) Server side query language


11) A relational database developer refers to a record as

A. a criteria

B. a relation

C. a tuple

D. an attribute


12) .......... keyword is used to find the number of values in a column.

A. TOTAL

B. COUNT

C. ADD

D. SUM


13) An advantage of the database management approach is

A. data is dependent on programs

B. data redundancy increases

C. data is integrated and can be accessed by multiple programs

D. none of the above


14) The collection of information stored in a database at a particular moment is called as ......

A. schema

B. instance of the database

C. data domain

D. independence


15) Data independence means

A. data is defined separately and not included in programs.

B. programs are not dependent on the physical attributes of data

C. programs are not dependent on the logical attributes of data

D. both B and C


16) A ......... is used to define overall design of the database

A. schema

B. application program

C. data definition language

D. code


17) Key to represent relationship between tables is called

A. primary key

B. secondary key

C. foreign key

D. none of the above


18) Grant and revoke are ....... statements.

A. DDL

B. TCL

C. DCL

D. DML


19) DBMS helps achieve

A. Data independence

B. Centralized control of data

C. Neither A nor B

D. Both A and B


20) .......... command can be used to modify a column in a table

A. alter

B. update

C. set

D. create


Answers:
1. C) Program
2. B) Domains
3. A) Entity
4. C) Data Flow Diagram
5. A) Hierarchical schema
6. C) System
7. B) Schema
8. C) Having
9. B) is a standard .. accessible parts.
10. C) Structured query language
11) C. a tuple
12) B. COUNT
13) C. data is integrated and can be accessed by multiple programs
14) B. instance of the database
15) D. both B and C
16) A. schema


Part-2

1. The candidate key is that you choose to identify each row uniquely is called ……………..

A) Alternate Key

B) Primary Key

C) Foreign Key

D) None of the above


2. …………….. is used to determine whether of a table contains duplicate rows.

A) Unique predicate

B) Like Predicate

C) Null predicate

D) In predicate


3. To eliminate duplicate rows ……………… is used

A) NODUPLICATE

B) ELIMINATE

C) DISTINCT

D) None of these


4. State true or false

i) A candidate key is a minimal super key.

ii) A candidate key can also refer to as surrogate key.

A) i-true, ii-false

B) i-false, ii-true

C) i-true, ii-true

D) i-false, ii-false


5. DCL stands for

A) Data Control Language

B) Data Console Language

C) Data Console Level

D) Data Control Level


6. …………………… is the process of organizing data into related tables.

A) Normalization

B) Generalization

C) Specialization

D) None of the above


7. A ………………. Does not have a distinguishing attribute if its own and mostly are dependent entities, which are part of some another entity.

A) Weak entity

B) Strong entity

C) Non attributes entity

D) Dependent entity


8. …………….. is the complex search criteria in the where clause.

A) Sub string

B) Drop Table

C) Predict

D) Predicate


9. ………………… is preferred method for enforcing data integrity

A) Constraints

B) Stored Procedure

C) Triggers

D) Cursors


10. The number of tuples in a relation is called its …………. While the number of attributes in a relation is called it’s ………………..

A) Degree, Cardinality

B) Cardinality, Degree

C) Rows, Columns

D) Columns, Rows


11) The language that requires a user to specify the data to be retrieved without specifying exactly how to get it is

A. Procedural DML

B. Non-Procedural DML

C. Procedural DDL

D. Non-Procedural DDL


12) Which two files are used during operation of the DBMS?

A. Query languages and utilities

B. DML and query language

C. Data dictionary and transaction log

D. Data dictionary and query language


13) The database schema is written in

A. HLL

B. DML

C. DDL

D. DCL


14) The way a particular application views the data from the database that the application uses is a

A. module

B. relational model

C. schema

D. sub schema


15) The relational model feature is that there

A. is no need for primary key data

B. is much more data independence than some other database models

C. are explicit relationships among records.

D. are tables with many dimensions


16) Which one of the following statements is false?

A. The data dictionary is normally maintained by the database administrator

B. Data elements in the database can be modified by changing the data dictionary.

C. The data dictionary contains the name and description of each data element.

D. The data dictionary is a tool used exclusively by the database administrator.


17) Which of the following are the properties of entities?

A. Groups

B. Table

C. Attributes

D. Switchboards


18) Which database level is closest to the users?

A. External

B. Internal

C. Physical

D. Conceptual


19) Which are the two ways in which entities can participate in a relationship?

A. Passive and active

B. Total and partial

C. Simple and Complex

D. All of the above


20) ........ data type can store unstructured data

A. RAW

B. CHAR

C. NUMERIC

D. VARCHAR

Answers:
1. B. Primary Key
2. A. Unique predicate
3. C. DISTINCT
4. C. i-true, ii-true
5. A. Data Control Language
6. A. Normalization
7. A. Weak entity
8. D. Predicate
9. A. Constraints
10. B. Cardinality, Degree
11. B. Non-Procedural DML
12.C. Data dictionary and transaction log
13. C. DDL
14. D. sub schema
15. B. is much more data independence than some other database models
16. B. Data elements in the database can be modified by changing the data dictionary.
17. C. Attributes
18. A. External
19. B. Total and partial
20. A. RAW

Part-3
1. State true or false.
i) Select operator is not a unary operator.
ii) Project operator chooses subset of attributes or columns of a relation.

A) i-True, ii-False

B) i-True, ii-True

C) i-False, ii-True

D) i-False, ii-False


2. …………… database is used as template for all databases created.

A) Master

B) Model

C) Tempdb

D) None of the above


3. One aspect that has to be dealt with by the integrity subsystem is to ensure that only valid values can be assigned to each data items. This is referred to as

A) Data Security

B) Domain access

C) Data Control

D) Domain Integrity


4. ………………….. operator is basically a join followed by a project on the attributes of first relation.

A) Join

B) Semi-Join

C) Full Join

D) Inner Join


5. Which of the following is not a binary operator in relational algebra?

A) Join

B) Semi-Join

C) Assignment

D) Project


6. Centralizing the integrity checking directly under the DBMS ………….. Duplication and ensures the consistency and validity of the database.

A) Increases

B) Skips

C) Does not reduce

D) Reduces


7. Which of the following is/are the DDL statements?

A) Create

B) Drop

C) Alter

D) All of the above


8. In snapshot, …………………. clause tells oracle how long to wait between refreshes.

A) Complete

B) Force

C) Next

D) Refresh


9. ……………… defines rules regarding the values allowed in columns and is the standard mechanism for enforcing database integrity.

A) Column

B) Constraint

C) Index

D) Trigger


10. For like predicate which of the following is true.
i) % matches zero of more characters.
ii) _ matches exactly one character.

A) i-only

B) ii-only

C) Both of them

D) None of them


Answers:
1. C) i-False, ii-True
2. B) Model
3. D) Domain Integrity
4. B) Semi-Join
5. D) Project
6. D) Reduces
7. D) All of the above
8. D) Refresh
9. B) Constraint
10. C) Both of them


Part-4
1. In SQL, which command is used to issue multiple CREATE TABLE, CREATE VIEW and GRANT statements in a single transaction?

A) CREATE PACKAGE

B) CREATE SCHEMA

C) CREATE CLUSTER

A) All of the above


2. In SQL, the CREATE TABLESPACE is used

A) to create a place in the database for storage of scheme objects, rollback segments, and naming the data files to comprise the tablespace.

B) to create a database trigger.

C) to add/rename data files, to change storage

D) All of the above


3. Which character function can be used to return a specified portion of a character string?

A) INSTR

B) SUBSTRING

C) SUBSTR

D) POS


4. Which of the following is TRUE for the System Variable $date$?

A) Can be assigned to a global variable.

B) Can be assigned to any field only during design time.

C) Can be assigned to any variable or field during run time.

D) Can be assigned to a local variable.


5. What are the different events in Triggers?

A) Define, Create

B) Drop, Comment

C) Insert, Update, Delete

D) Select, Commit


6. Which is the subset of SQL commands used to manipulate Oracle Database Structures, including tables?

A) Data Definition Language

B) Data Manipulation Language

C) Data Described Language

D) Data Retrieval Language


7. The SQL statement SELECT SUBSTR('123456789', INSTR('abcabcabc','b'), 4) FROM EMP; prints

A) 6789

B) 2345

C) 1234

D) 456789


8. Which of the following SQL command can be used to modify existing data in a database table?

A) MODIFY

B) UPDATE

C) CHANGE

D) NEW


9. When SQL statements are embedded inside 3GL, we call such a program as ..........

A) nested query

B) nested programming

C) distinct query

D) embedded SQL


10. ................ provides option for entering SQL queries as execution time, rather than at the development stage.

A) PL/SQL

B) SQL*Plus

C) SQL

D) Dynamic SQL



11) The RDBMS terminology for a row is

A. tuple

B. relation

C. attribute

D. degree


12) To change column value in a table the ......... command can be used.

A. create

B. insert

C. alter

D. update


13) The full form of DDL is

A. Dynamic Data Language

B. Detailed Data Language

C. Data Definition Language

D. Data Derivation Language


14) To pass on granted privileges to other user the ...... clause is used

A. create option

B. grant option

C. update option

D. select option


15) A set of possible data values is called

A. attribute

B. degree

C. tuple

D. domain


16) ......... is critical in formulating database design.

A. row column order

B. number of tables

C. functional dependency

D. normalizing


17) A primary key if combined with a foreign key creates

A. Parent-Child relationship between the tables that connect them

B. Many to many relationship between the tables that connect them

C. Network model between the tables that connect them

D. None of the above


18) A ............. represents the number of entities to which another entity can be associated

A. mapping cardinality

B. table

C. schema

D. information


19) Which two files are used during operation of the DBMS

A. Query languages and utilities

B. DML and query language

C. Data dictionary and transaction log

D. Data dictionary and query language


20) A ........... is a set of column that identifies every row in a table.

A. composite key

B. candidate key

C. foreign key

D. super key


Answers:


1. B) CREATE SCHEMA
2. A) to create a place in the database for storage of scheme objects, rollback segments, and naming  the data files to comprise the table-space.
3. C) SUBSTR
4. B) Can be assigned to any field only during design time.
5. C) Insert, Update, Delete
6. A) Data Definition Language
7. B) 2345
8. B) UPDATE
9. D) embedded SQL
10.D) Dynamic SQL
11) A. tuple
12) D. update
13) C. Data Definition Language
14) B. grant option
15) D. domain
16) C. functional dependency
17) A. Parent-Child relationship between the tables that connect them
18) A. mapping cardinality
19) C. Data dictionary and transaction log
20) D. super key

Part-5
1. The relational model is based on the concept that data is organized and stored in two-dimensional tables called ……………………….

A) Fields

B) Records

C) Relations

D) Keys


2. ……………….. contains information that defines valid values that are stored in a column or data type.

A) View

B) Rule

C) Index

D) Default


3. Which of the syntax is correct for insert statement?
i) insert into values
ii) insert into (column list) values

A) i-only

B) ii-only

C) Both of them

D) None of them


4. ………………. First proposed the process of normalization.

A) Edgar. W

B) Edgar F. Codd

C) Edward Stephen

D) Edward Codd


5. For using a specific database …………… command is used.

A) use database

B) database name use

C) Both A &B

D) None of them


6. Which of the following is not comparison operator?

A) <>

B) <

C) =<

D) >=


7. An outstanding functionality of SQL is its support for automatic ………… to the target data.

A) programming

B) functioning

C) navigation

D) notification


8. ………………… is a special type of integrity constraint that relates two relations & maintains consistency across the relations.

A) Entity Integrity Constraints

B) Referential Integrity Constraints

C) Domain Integrity Constraints

D) Domain Constraints

E) Key Constraints


9. ……………..specifies a search condition for a group or an aggregate.

A) GROUP BY Clause

B) HAVING Clause

C) FROM Clause

D) WHERE Clause


10. Drop Table cannot be used to drop a table referenced by a …………… constraint.

A) Local Key

B) Primary Key

C) Composite Key

D) Foreign Key


Answers:

1. C) Relations
2. C) Index
3. C) Both of them
4. B) Edgar F. Codd
5. A) use database
6. C) =<
7. C) navigation
8. B) Referential.....Constraints
9. B) HAVING Clause
10. D) Foreign Key

Part-6
1. ............... joins are SQL server default

A) Outer

B) Inner

C) Equi

D) None of the above


2. The ..................... is essentially used to search for patterns in target string.

A) Like Predicate

B) Null Predicate

C) In Predicate

D) Out Predicate


3. Which of the following is/are the Database server functions?
i) Data management            ii) Transaction management
iii) Compile queries            iv) Query optimization

A) i, ii, and iv only

B) i, ii and iii only

C) ii, iii and iv only

D) All i, ii, iii, and iv


4. To delete a database ................... command is used

A) delete database database_name

B) Delete database_name

C) drop database database_name

D) drop database_name


5. .............. is a combination of two of more attributes used as a primary key

A) Composite Key

B) Alternate Key

C) Candidate Key

D) Foreign Key


6. Which of the following is not the function of client?

A) Compile queries

B) Query optimization

C) Receive queries

D) Result formatting and presentation


7. ............. is a special type of stored procedure that is automatically invoked whenever the data in the table is modified.

A) Procedure

B) Trigger

C) Curser

D) None of the above


8. ................. requires that data should be made available to only authorized users.

A) Data integrity

B) Privacy

C) Security

D) None of the above


9. Some of the utilities of DBMS are .............
i) Loading          ii) Backup               iii) File organization          iv) Process Organization

A) i, ii, and iv only

B) i, ii and iii only

C) ii, iii and iv only

D) All i, ii, iii, and iv


10. ................. allows individual row operation to be performed on a given result set or on the generated by a selected by a selected statement.

A) Procedure

B) Trigger

C) Curser

D) None of above

Answers:

1. B) Inner
2. A) Like Predicate
3. A) i, ii, and iv only
4. C) drop ....database_name
5. A) Composite Key
6. B) Query optimization
7. B) Trigger
8. C) Security
9. B) i, ii and iii only
10. C) Curser

Part-7
1. Processed data is called ………………..

A) Raw data

B) Information

C) Useful data

D) Source


2. …………….. is a utility to capture a continuous record of server activity and provide auditing capability.

A) SQL server Profile

B) SQL server service manager

C) SQL server setup

D) SQL server wizard.


3. Data items grouped together for storage purposes are called a

A) record

B) title

C) list

D) string


4. …………. contains data assisting day to day activities of the organization.

A) Control database

B) Operational database

C) Strategic database

D) Sequential database


5. ………………… approach reduces time and effort required for design and lesser risk in database management.

A) Single global database

B) Top-down approach

C) Multiple databases

D) None of the above


6. HSAM stands for ……….

A) Hierarchic Sequential Access Method

B) Hierarchic Standard Access Method

C) Hierarchic Sequential and Method

D) Hierarchic Standard and Method


7. SQL server stores index information in the ………… system table

A) syst indexes

B) system indexes

C) sysind

D) sys indexes


8. The one guideline to be followed while designing the database is

A) A database design may be ambiguous.

B) Unrelated data should be in the same table so that updating the data will be easy.

C) It should avoid/reduce the redundancy.

D) An entity should not have attributes.


9. Which of the following is not a logical database structure?

A) Chain

B) Network

C) Tree

D) Relational


10. ……………. is a preferred method for enforcing data integrity

A) Constraints

B) Stored procedure

C) Triggers

D) Cursors


Answers:

1. B) Information
2. B) SQL server service manager
3. A) record
4. B) Operational database
5. C) Multiple databases
6. A) Hierarchic Sequential Access Method
7. D) sys indexes
8. C) It should avoid/reduce the redundancy.
9. A) Chain
10. A) Constraints

Part-8
1. Reflexivity property says that X - Y is true if Y is ………………….

A) Subset of X

B) Null set of X

C) Super set of Y

D) Subset of Y


2. Anything that affects the database schema is a part of

A) DML

B) DCL

C) DDL

D) All of the above


3. An instance of a relation is a time varying set of ………………….

A) Tuples

B) Rows

C) Both of them

D) None of them


4. In the ………………… mode any record in the file can be accessed at random

A) Sequential access

B) Random access

C) Standard access

D) Source access


5. Which can be used to delete all the rows if a table?

A) Delete * from table_name

B) Delete from table_name

C) Delete table_name

D) all rows cannot be deleted at a time.


6. Which if the following is not the type of data integrity.

A) Key integrity

B) Domain integrity

C) Entity integrity

D) Referential integrity


7. 4NF stands for ..

A) Fourth Normal File

B) Fourth Normal Form

C) Fourth Normal Fraction

D) Fourth Negative File


8. A ……………… allows to make copies of the database periodically to help in the cases of crashes & disasters.

A) Recovery utility

B) Backup Utility

C) Monitoring utility

D) Data loading utility


9. ………………. Allows definitions and query language statements to be entered; query results are formatted and displayed.

A) Schema Processor

B) Query Processor

C) Terminal Interface

D) None of the above


10. The main task carried out in the …………… is to remove repeating attributes to separate tables.

A) First Normal Form

B) Second Normal Form

C) Third Normal Form

D) Fourth Normal Form

Answers:

1. A) Subset of X
2. C) DDL
3. C) Both of them
4. B) Random access
5. A) Delete * from table_name
6. A) Key integrity
7. B) Fourth Normal Form
8. B) Backup Utility
9. C) Terminal Interface
10. D) Fourth Normal Form

Part-9
1. ............................ is the powerful language for working with RDBMS.

A) Embedded Programs
Objective Questions of Database Management System
Database Management System (Photo credit: Wikipedia)

B) Dynamic Programs

C) Query Language

D) Static Language Programs



2. The file in DBMS is called as .................. in RDBMS.

A) console

B) schema

C) table

D) object



3. In ..................... , we have a strict parent-child relationship only.


A) hierarchical databases.

B) network databases

C) object oriented databases

D) relational databases



4. Which normal form is considered adequate for relational database design?

A) 2 NF

B) 3 NF

C) 4 NF

D) BCNF



5. What operator tests column for the absence of data?

A) IS NULL operator

B) ASSIGNMENT operator

C) LIKE operator

D) NOT operator



6. Which is proper subset designed to support views belonging to different classes of users in order to hide or protect information.

A) Schema

B) Sub-schema

C) Non-schema

D) Non-sub schema



7. Which contain information about a file needed by system programs for accessing file records?

A) File blocks

B) File operators

C) File headers

D) None of these



8. A .................... DBMS distributes data processing tasks between the workstation and network server.

A) Network

B) Relational

C) Client Server

D) Hierarchical



9. The .................... refers to the way data is organized in and accessible from DBMS.

A) database hierarchy

B) data organization

C) data sharing

D) data model



10. ................. is a statement that is executed automatically by the system.

A) trigger

B) assertion

C) durability

D) integrity constraint



Answers:


1. ............................ is the powerful language for working with RDBMS.

C) Query Language


2. The file in DBMS is called as .................. in RDBMS.

C) table


3. In ..................... , we have a strict parent-child relationship only.


A) hierarchical databases.


4. Which normal form is considered adequate for relational database design?

B) 3 NF


5. What operator tests column for the absence of data?

A) IS NULL operator


6. Which is proper subset designed to support views belonging to different classes of users in order to hide or protect information.

B) Sub-schema


7. Which contain information about a file needed by system programs for accessing file records?

C) File headers


8. A .................... DBMS distributes data processing tasks between the workstation and network server.

C) Client Server


9. The .................... refers to the way data is organized in and accessible from DBMS.

D) data model


10. ................. is a statement that is executed automatically by the system.

A) trigger


Part-10
1) Which of the following is not a characteristic of a relational database model?

A. Table

B. Tree like structure

C. Complex logical relationship

D. Records


2) Field is otherwise called as ......... of the record

A. data item

B. data type

C. value

D. variable


3) A table can have only one

A. Secondary key

B. Alternate key

C. Unique key

D. Primary key


4) A field can be called as ........... in relation context.

A. random file

B. direct file

C. attribute

D. tuple


5) In the relational modes, cardinality is termed as

A. Number of tuples

B. Number of attributes

C. Number of tables

D. Number of constraints


6) The ........ is used for creating and destroying table, indexes and other forms of structures.

A. data manipulation language

B. data control language

C. transaction control language

D. data definition language


7) The view of total database content is

A. Conceptual view

B. Internal view

C. External view

D. Physical view


8) The ............ refers to the way data is organized in and accessible from DBMS.

A. database hierarchy

B. data organization

C. data sharing

D. data model


9) Architecture of the database can be viewed as

A. two levels

B. four levels

C. three levels

D. one level


10) ........ introduced the relational database rules.

A. Atul kahate

B. James Gossling

C. EF Codd

D. Dennies Rithchie


11) In a relational model, relations are termed as

A. Tuples

B. Attributes

C. Tables

D. Rows


12) When the values in one or more attributes being used as a foreign key must exist in another set of one or more attributes in another table, we have created a(n) ........

A. transitive dependency

B. insertion anomaly

C. referential integrity constraint

D. normal form


13) In the architecture of a database system external level is the

A. physical level

B. logical level

C. conceptual level

D. view level


14) A functional dependency is a relationship between or among .......

A. tables

B. rows

C. relations

D. attributes


15) Related fields in a database are grouped to form a

A. data file

B. data record

C. menu

D. bank


16) .......... is, a table have more than one set of attributes that could be chosen as the key

A. foreign key

B. integrity key

C. relationship

D. candidate key


17) The database environment has all of the following components except.

A. users

B. separate files

C. database

D. database administrator


18) The operation of eliminating columns in a table done by ........ operation.

A. Restrict

B. Project

C. Union

D. Divide


19) The way a particular application views the data from the database that the application uses is a

A. module

B. relational model

C. schema

D. sub schema


20) ....... is a condition specified on a database schema and restricts the data that can be stored in an instance of the database.

A. Key Constraint

B. Check Constraint

C. Foreign key constraint

D. integrity constraint


Answers:

1) B. Tree like structure
2) A. data item
3) D. Primary key
4) C. attribute
5) A. Number of tuples
6) D. data definition language
7) A. Conceptual view
8) D. data model
9) C. three levels
10) C. EF Codd
11) C. Tables
12) C. referential integrity constraint
13) D. view level
14) D. attributes
15) B. data record
16) D. candidate key
17) A. users
18) B. Project
19) D. sub schema
20) B. Check Constraint

Part-11
1. A ..................... specifies the actions needed to remove the drawbacks in the current design of database.

A) 1 NF

B) 2 NF

C) 3 NF

D) Normal form



2. A relation is in ........................... if an attribute of a composite key is dependent on an attribute of other composite key.

A) 2NF

B) 3NF

C) BCNF

D) 1NF



3. Fifth Normal form is concerned with

A) Functional dependency

B) Multivalued dependency

C) Join dependency

D) Domain key



4. A table is in the ....................... if only candidate keys are the determinants.

A) functional dependency

B) transitive dependency

C) 4 NF

D) BCNF



5. In 2NF

A) No functional dependencies exist.

B) No multivalued dependencies exist.

C) No partial functional dependencies exist

D) No partial multivalued dependencies exist.


6. The normal form that is not necessarily dependency preserving is

A) 2NF

B) 3NF

C) BCNF

D) 4NF



7. The ................. is related to the concept of multi-valued dependency.

A) fourth normal form

B) fifth normal form

C) boyce codd normal form

D) third normal form



8. Which normal form is considered adequate for normal relational database design?

A) 2NF

B) 5NF

C) 4NF

D) 3NF



9. Dependency preservation is not guaranteed in

A) BCNF

B) 3NF

C) 4NF

D) DKNF



10. A relation is ................... if every field contains only atomic values that is, no lists or sets.

A) 1 NF

B) 2 NF

C) 3 NF

D) BCNF



Answers:



1. A ..................... specifies the actions needed to remove the drawbacks in the current design of database.

D) Normal form

2. A relation is in ........................... if an attribute of a composite key is dependent on an attribute of other composite key.

B) 3NF

3. Fifth Normal form is concerned with

C) Join dependency

4. A table is in the ....................... if only candidate keys are the determinants.

D) BCNF

5. In 2NF

C) No partial functional dependencies exist

6. The normal form that is not necessarily dependency preserving is

A) 2NF

7. The ................. is related to the concept of multi-valued dependency.

A) fourth normal form

8. Which normal form is considered adequate for normal relational database design?

D) 3NF

9. Dependency preservation is not guaranteed in

A) BCNF

10. A relation is ................... if every field contains only atomic values that is, no lists or sets.

A) 1 NF


Part-12
1. Which of the following relational algebra operations do not require the participating tables to be union-compatible?

A. Union

B. Intersection

C. Difference

D. Join


2) Relational Algebra does not have

A. Selection operator

B. Projection operator

C. Aggregation operator

D. Division operator


3) Tree structures are used to store data in

A. Network model

B. Relational model

C. Hierarchical model

D. File based system


4) The rule that a value of a foreign key must appear as a value of some specific table is called a

A. Referential constraint

B. Index

C. Integrity constraint

D. Functional dependency


5) It is an abstraction through which relationships are treated as higher level entities.

A. Generalization

B. Specialization

C. Aggregation

D. Inheritance


6) The operation which is not considered a basic operation of relational algebra is

A. Join

B. Selection

C. Union

D. Cross product


7) In SQL the statement select*from R,S is equivalent to

A. Select * from R natural join S

B. Select * from R cross join S

C. Select * from R union join S

D. Select * from R inner join S


8) When an E-R diagram is mapped to tables, the representation is redundant for

A. Weak entity sets

B. weak relationship sets

C. Strong entity sets

D. strong relationship sets


9) If two relations R and S are joined, then the non matching ruples of both R and S are ignored in

A. left outer join

B. right outer join

C. full outer join

D. inner join


10) Relational Algebra is

A. Data Definition Language

B. Meta Language

C. Procedural query Language

D. None of the above



11) If an entity can belong to only one lower level entity then the constraint is

A. disjoint

B. partial

C. overlapping

D. single


12) The common column is eliminated in

A. theta join

B. outer join

C. natural join

D. composed join


13) In E-R diagram total participation is represented by

A. double lines

B. Dashed lines

C. single line

D. Triangle


14) Relationships among relationships can be represented in an E-R model using

A. Aggregation

B. Association

C. Weak entity sets

D. Weak relationship sets


15) Which of the following constitutes a basic set of operations for manipulating relational data?

A. Predicate calculus

B. Relational calculus

C. Relational algebra

D. SQL


16) Relational calculus is a

A. Procedural language

B. Non-Procedural language

C. Data definition language

D. High level language


17) Cartesian product in relational algebra is

A. a Unary operator

B. a Binary operator

C. a Ternary operator

D. not defined



18) In an E-R diagram attributes are represented by

A. rectangle

B. square

C. ellipse

D. triangle



19) In an E-R diagram an entity set is represent by a

A. rectangle

B. ellipse

C. diamond box

D. circle



20) E-R model uses this symbol to represent weak entity set?

A. Dotted rectangle

B. Diamond

C. Doubly outlined rectangle

D. None of these


Answers:

1) D.Join

2) C. Aggregation operator

3) C. Hierarchical model

4) A. Referential constraint

5) C. Aggregation

6) A. Join

7) B. Select * from R cross join S

8) B. weak relationship sets

9) D. inner join

10) C. Procedural query Language

11) B. partial

12) C. natural join

13) A. double lines

14) A. Aggregation

15) C. Relational algebra

16) B. Non-Procedural language

17) B. a Binary operator

18) C. ellipse

19) A. rectangle

20) C. Doubly outlined rectangle

Part-13
1) What is a data integrity?

A. It is the data contained in database that is non redundant.

B. It is the data contained in database that is accurate and consistent.

C. It is the data contained in database that is secured.

D. It is the data contained in database that is shared.


2) As per equivalence rules for query transformation, selection operation distributes over

A. Union

B. Intersection

C. Set difference

D. All of the above


3) In SQL the word 'natural' can be used with

A. inner join

B. full outer join

C. right outer join

D. all of the above


4) Which of the following relational algebraic operations is not from set theory?

A. Union

B. Intersection

C. Cartesian Product

D. Select


5) An entity set that does not have sufficient attributes to form a primary key is a

A. strong entity set

B. weak entity set

C. simple entity set

D. primary entity set


6) In case of entity integrity, the primary key may be

A. not Null

B. Null

C. both Null and not Null

D. any value


7) A logical schema

A. is the entire database.

B. is a standard way of organizing information into accessible parts.

C. describes how data is actually stored on disk

D. both A and C


8) Which of the operations constitute a basic set of operations for manipulating relational data?

A. Predicate calculus

B. Relational calculus

C. Relational algebra

D. None of the above


9) Which of the following is another name for weak entity?

A. Child

B. Owner

C. Dominant

D. All of the above


10) Which of the following is record based logical model?

A. Network Model

B. Object oriented model

C. E-R model

D. None of the above



11) A file manipulation command that extracts some of the records from a file is called

A. SELECT

B. PROJECT

C. JOIN

D. PRODUCT


12) In E-R Diagram derived attribute are represented by

A. Ellipse

B. Dashed ellipse

C. Rectangle

D. Triangle


13) The natural join is equal to

A. Cartesian Product

B. Combination of Union and Cartesian product

C. Combination of selection and Cartesian product

D. Combination of projection and Cartesian product


14) In E-R diagram relationship type is represented by

A. Ellipse

B. Dashed ellipse

C. Rectangle

D. Diamond


15) In E-R diagram generalization is represented by

A. Ellipse

B. Dashed ellipse

C. Rectangle

D. Triangle


16) A table joined with itself is called

A. Join

B. Self Join

C. Outer Join

D. Equi Join


17) ........... means multiple copies of the same data items.

A. Data reduction

B. Data integrity

C. Data consistency

D. Data redundancy


18) Different values for the same data item is referred to as .......

A. data consistency

B. data inconsistency

C. data integrity

D. data duplication


19) The .......... returns row after combining two tables based on common values.

A. difference

B. product

C. join

D. union


20) The .......... can be used to ensure database integrity.

A. entity integrity

B. database constraints

C. referential integrity

D. cardinality

Answers:

1) B. It is the data contained in database that is accurate and consistent.
2) All of the above
3) A. inner join
4) D. Select
5) B. weak entity set
6) A. not Null
7) A. is the entire database.
8) C. Relational algebra
9) Child
10) A. Network Model
11) A. SELECT
12) B. Dashed ellipse
13) D. Combination of projection and Cartesian product
14) D. Diamond
15) D. Triangle
16) B. Self Join
17) D. Data redundancy
18) B. data inconsistency
19) C. join
20) B. database constraints


17) C. foreign key
18) C. DCL
19) D. Both A and B
20) A. alter






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