**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

**Ans:- (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

**Ans:- (A) AVL tree**

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

**A)** Abstract level**B)** Application level**C)** Implementation level**D)** All of the above

**Ans:- (C) Implementation level**

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

**Ans:- (A) Last 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

**Ans:- (C) True, True**

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

**A) **Operations**B) **Storage Structures**C) **Algorithms**D) **None of above

**Ans:- (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

**Ans:- (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

**Ans:- (A) push, pop **

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

**Ans:- (B) Queue **

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

**Ans:- (A) Stack **

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

**A) **Stacks**B) **Queues**C) **Dequeues**D)** Binary search tree

**Ans:- (B) Queues **

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

**A)** Arrays**B)** Records**C) **Pointers**D)** Stacks

**Ans:- (A) Arrays **

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

A**ns:- (A) Queue linked list **

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

**A) **Stacks**B) **List**C) **Strings**D)** Trees

**Ans:- (D) Trees **

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

**A) **Graphs**B)** Stacks**C)** Binary tree**D)** Queues

**Ans:- (C) Binary tree **

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

**A)** Stack**B)** queue**C)** Tree**D)** Array

**Ans:- (B) queue **

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 dequeue**C) **Priority queues**D)** Stack

**Ans:- (A) Input restricted dequeue **

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

**A) **Strings**B)** Lists**C) **Stacks**D) **Graph

**Ans:- (D) Graph **

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

**A) **Graph**B) **Trees**C) **Binary tree**D) **Stack

**Ans:- (D) Stack**

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

**A) **Dequeue**B)** Priority**C)** Tree**D) **Graph

**Ans:- (C) Tree **

21. **A directed graph is ………………. if there is a path from each vertex to every other vertex in the digraph**

**A)** Weakly connected**B)** Strongly Connected**C) **Tightly Connected**D)** Linearly Connected

**Ans:-** ** (B) Strongly Connected **

22. **In the …………….. traversal we process all of a vertex’s descendants before we move to an adjacent vertex**.

**A)** Depth First**B) **Breadth First**C) **With First**D)** Depth Limited

**Ans:- (A) Depth First **

23. **State True of False.i) Network is a graph that has weights or costs associated with it.ii) An undirected graph which contains no cycles is called a forest.iii) A graph is said to be complete if there is no edge between every pair of vertices.**

**A) **True, False, True**B)** True, True, False**C)** True, True, True**D)** False, True, True

**Ans:- (B) True, True, False **

24. **Match the following.a) Completeness i) How long does it take to find a solutionb) Time Complexity ii) How much memory need to perform the search.c) Space Complexity iii) Is the strategy guaranteed to find the solution when there in one**

**A)** a-iii, b-ii, c-i**B) **a-i, b-ii, c-iii**C)** a-iii, b-i, c-ii**D)** a-i, b-iii, c-ii

**Ans:- (C) a-iii, b-i, c-ii **

25. **The number of comparisons done by sequential search is ………………**

**A)** (N/2)+1**B)** (N+1)/2**C)** (N-1)/2**D)** (N+2)/2

**Ans:- (B) (N+1)/2 **

26. **In ……………, search start at the beginning of the list and check every element in the list**

**A) **Linear search**B)** Binary search**C) **Hash Search**D) **Binary Tree search

**Ans:- (A) Linear search **

27. **State True or False.i) Binary search is used for searching in a sorted array.ii) The time complexity of binary search is O(login)**

**A)** True, False**B)** False, True**C) **False, False**D) **True, True

**Ans:- (D) True, True **

28. **Which of the following is not the internal sort?**

**A) **Insertion Sort**B)** Bubble Sort**C)** Merge Sort**D) **Heap Sort

**Ans:- (C) Merge Sort **

29.** State True or False.i) An undirected graph which contains no cycles is called forest.ii) A graph is said to be complete if there is an edge between every pair of vertices.**

**A)** True, True**B)** False, True**C) **False, False**D)** True, False

**Ans:- (A) True, True **

30.** A graph is said to be ……………… if the vertices can be split into two sets V1 and V2 such there are no edges between two vertices of V1 or two vertices of V2.**

**A)** Partite**B) **Bipartite**C)** Rooted**D) **Bisects

**Ans:- (B) Bipartite **