Data structures &
Algorithms - Multiple Choice Questions (MCQs) - Objective

1. Two main measures
for the efficiency of an algorithm are

2. The time factor
when determining the efficiency of algorithm is measured by

a. Counting
microseconds

b. Counting the number of key operations

c. Counting the number of statements

d. Counting the kilobytes of algorithm

b. Counting the number of key operations

c. Counting the number of statements

d. Counting the kilobytes of algorithm

3. The space factor
when determining the efficiency of algorithm is measured by

a. Counting the
maximum memory needed by the algorithm

b. Counting the minimum memory needed by the algorithm

c. Counting the average memory needed by the algorithm

d. Counting the maximum disk space needed by the algorithm

b. Counting the minimum memory needed by the algorithm

c. Counting the average memory needed by the algorithm

d. Counting the maximum disk space needed by the algorithm

4. Which of the
following case does not exist in complexity theory

a. Best case

b. Worst case

c. Average case

d. Null case

b. Worst case

c. Average case

d. Null case

5. The Worst case
occur in linear search algorithm when

a. Item is somewhere
in the middle of the array

b. Item is not in the array at all

c. Item is the last element in the array

d. Item is the last element in the array or is not there at all

6. The Average case occur in linear search algorithm

b. Item is not in the array at all

c. Item is the last element in the array

d. Item is the last element in the array or is not there at all

6. The Average case occur in linear search algorithm

a. When Item is
somewhere in the middle of the array

b. When Item is not in the array at all

c. When Item is the last element in the array

d. When Item is the last element in the array or is not there at all

7. The complexity of the average case of an algorithm is

b. When Item is not in the array at all

c. When Item is the last element in the array

d. When Item is the last element in the array or is not there at all

7. The complexity of the average case of an algorithm is

a. Much more
complicated to analyze than that of worst case

b. Much more simpler to analyze than that of worst case

c. Sometimes more complicated and some other times simpler than that of worst case

d. None or above

8. The complexity of linear search algorithm is

b. Much more simpler to analyze than that of worst case

c. Sometimes more complicated and some other times simpler than that of worst case

d. None or above

8. The complexity of linear search algorithm is

a. O(n)

b. O(log n)

c. O(n2)

d. O(n log n)

9. The complexity of Binary search algorithm is

b. O(log n)

c. O(n2)

d. O(n log n)

9. The complexity of Binary search algorithm is

a. O(n)

b. O(log )

c. O(n2)

d. O(n log n)

10. The complexity of Bubble sort algorithm is

b. O(log )

c. O(n2)

d. O(n log n)

10. The complexity of Bubble sort algorithm is

a. O(n)

b. O(log n)

c. O(n2)

d. O(n log n)

11. The complexity of merge sort algorithm is

b. O(log n)

c. O(n2)

d. O(n log n)

11. The complexity of merge sort algorithm is

a. O(n)

b. O(log n)

c. O(n2)

d. O(n log n)

12. The indirect change of the values of a variable in one module by another module is called

b. O(log n)

c. O(n2)

d. O(n log n)

12. The indirect change of the values of a variable in one module by another module is called

a. internal change

b. inter-module change

c. side effect

d. side-module update

13. Which of the following data structure is not linear data structure?

b. inter-module change

c. side effect

d. side-module update

13. Which of the following data structure is not linear data structure?

a. Arrays

b. Linked lists

c. Both of above

d. None of above

14. Which of the following data structure is linear data structure?

b. Linked lists

c. Both of above

d. None of above

14. Which of the following data structure is linear data structure?

a. Trees

b. Graphs

c. Arrays

d. None of above

15. The operation of processing each element in the list is known as

b. Graphs

c. Arrays

d. None of above

15. The operation of processing each element in the list is known as

a. Sorting

b. Merging

c. Inserting

d. Traversal

b. Merging

c. Inserting

d. Traversal

16. Finding the
location of the element with a given value is:

a. Traversal

b. Search

c. Sort

d. None of above

b. Search

c. Sort

d. None of above

17. Arrays are best
data structures

a. for relatively
permanent collections of data

b. for the size of the structure and the data in the structure are constantly changing

c. for both of above situation

d. for none of above situation

18. Linked lists are best suited

b. for the size of the structure and the data in the structure are constantly changing

c. for both of above situation

d. for none of above situation

18. Linked lists are best suited

a. for relatively
permanent collections of data

b. for the size of the structure and the data in the structure are constantly changing

c. for both of above situation

d. for none of above situation

b. for the size of the structure and the data in the structure are constantly changing

c. for both of above situation

d. for none of above situation

19. Each array
declaration need not give, implicitly or explicitly, the information about

a. the name of array

b. the data type of array

c. the first data from the set to be stored

d. the index set of the array

20. The elements of an array are stored successively in memory cells because

b. the data type of array

c. the first data from the set to be stored

d. the index set of the array

20. The elements of an array are stored successively in memory cells because

a. by this way
computer can keep track only the address of the first element and the addresses
of other elements can be calculated

b. the architecture of computer memory does not allow arrays to store other than serially

c. both of above

d. none of above

b. the architecture of computer memory does not allow arrays to store other than serially

c. both of above

d. none of above

**Answers**

1. Two main measures
for the efficiency of an algorithm are

c. Time and space

2. The time factor
when determining the efficiency of algorithm is measured by

b. Counting the number
of key operations

3. The space factor
when determining the efficiency of algorithm is measured by

a. Counting the
maximum memory needed by the algorithm

4. Which of the
following case does not exist in complexity theory

d. Null case

5. The Worst case
occur in linear search algorithm when

d. Item is the last
element in the array or is not there at all

6. The Average case
occur in linear search algorithm

a. When Item is
somewhere in the middle of the array

7. The complexity of
the average case of an algorithm is

a. Much more
complicated to analyze than that of worst case

8. The complexity of
linear search algorithm is

a. O(n)

9. The complexity of
Binary search algorithm is

b. O(log n)

10. The complexity of
Bubble sort algorithm is

c. O(n

^{2})
11. The complexity of
merge sort algorithm is

d. O(n log n)

12. The indirect
change of the values of a variable in one module by another module is called

c. side effect

13. Which of the
following data structure is not linear data structure?

d. None of above

14. Which of the
following data structure is linear data structure?

c. Arrays

15. The operation of
processing each element in the list is known as

d. Traversal

16. Finding the
location of the element with a given value is:

b. Search

17. Arrays are best
data structures

a. for relatively
permanent collections of data

18. Linked lists are
best suited

b. for the size of the
structure and the data in the structure are constantly changing

19. Each array
declaration need not give, implicitly or explicitly, the information about

c. the first data from
the set to be stored

20. The elements of an array are stored successively in memory cells because

a. by this way
computer can keep track only the address of the first element and the addresses
of other elements can be calculated

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