Solved MCQ of Data Structure Set-1

1. Which if the following is/are the levels of implementation of data structure

A) Abstract level

B) Application level

C) Implementation level

D) All of the above


2. A binary search tree whose left subtree and right subtree differ in hight by at most 1 unit is called ……

A) AVL tree

B) Red-black tree

C) Lemma tree

D) None of the above


3. ……………….. level is where the model becomes compatible executable code

A) Abstract level

B) Application level

C) Implementation level

D) All of the above


4. Stack is also called as

A) Last in first out

B) First in last out

C) Last in last out

D) First in first out


5. Which of the following is true about the characteristics of abstract data types?

i) It exports a type.

ii) It exports a set of operations

A) True, False

B) False, True

C) True, True

D) False, False


6. …………… is not the component of data structure.

A) Operations

B) Storage Structures

C) Algorithms

D) None of above


7. Which of the following is not the part of ADT description?

A) Data

B) Operations

C) Both of the above

D) None of the above


8. Inserting an item into the stack when stack is not full is called …………. Operation and deletion of item form the stack, when stack is not empty is called ………..operation.

A) push, pop

B) pop, push

C) insert, delete

D) delete, insert


9. ……………. Is a pile in which items are added at one end and removed from the other.

A) Stack

B) Queue

C) List

D) None of the above


10. ………… is very useful in situation when data have to stored and then retrieved in reverse order.

A) Stack

B) Queue

C) List

D) Link list


11. Which data structure allows deleting data elements from and inserting at rear?

A) Stacks

B) Queues

C) Dequeues

D) Binary search tree


12. Which of the following data structure can't store the non-homogeneous data elements?

A) Arrays

B) Records

C) Pointers

D) Stacks


13. A ....... is a data structure that organizes data similar to a line in the supermarket, where the first one in line is the first one out.

A) Queue linked list

B) Stacks linked list

C) Both of them

D) Neither of them


14. Which of the following is non-liner data structure?

A) Stacks

B) List

C) Strings

D) Trees


15. Herder node is used as sentinel in .....

A) Graphs

B) Stacks

C) Binary tree

D) Queues


16. Which data structure is used in breadth first search of a graph to hold nodes?

A) Stack

B) queue

C) Tree

D) Array


17. Identify the data structure which allows deletions at both ends of the list but insertion at only one end.

A) Input restricted dequeue

B) Output restricted qequeue

C) Priority queues

D) Stack


18. Which of the following data structure is non linear type?

A) Strings

B) Lists

C) Stacks

D) Graph


19. Which of the following data structure is linear type?

A) Graph

B) Trees

C) Binary tree

D) Stack


20. To represent hierarchical relationship between elements, Which data structure is suitable?

A) Dequeue

B) Priority

C) Tree

D) Graph

Answers:

1. D) All of the above
2. A) AVL tree
3. C) Implementation level
4. A) Last in first out
5. C) True, True
6. D) None of above
7. D) None of the above
8. A) push, pop
9. B) Queue
10. A) Stack
11. B) Queues
12. A) Arrays
13. A) Queue linked list
14. D) Trees
15. C) Binary tree
16. B) queue
17. A) Input restricted dequeue
18. D) Graph
19. D) Stack
20. C) Tree

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