# Important Data structure and algorithm Set 1

Read important Data structure and algorithm MCQS For Exam.These General Knowledge Mcqs Contain  of World technology,  Science & Literature, events Mcqs, Data structure and algorithm  Mcqs and International Organizations. These general knowledge questions are very important for all type of exams.

##### Note: The bold option is the right answer for the given MCQ’S:

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 operation
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

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.
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

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

22. In the …………….. traversal we process all of a vertex’s descendants before we move to an adjacent vertex.
A) Depth First
C) With First
D) Depth Limited

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

24. Match the following. a) Completeness i) How long does it take to find a solution b) 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

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

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

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(logn).
A) True, False
B) False, True
C) False, False

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

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
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

31. In a queue, the initial values of front pointer f rare pointer r should be …….. and ……….. respectively.

A) 0 and 1
B) 0 and -1
C) -1 and 0
D) 1 and 0

32. In a circular queue the value of r will be ..
A) r=r+1
B) r=(r+1)% [QUEUE_SIZE – 1] C) r=(r+1)% QUEUE_SIZE
D) r=(r-1)% QUEUE_SIZE

33. Which of the following statement is true? i) Using singly linked lists and circular list, it is not possible to traverse the list backwards. ii) To find the predecessor, it is required to traverse the list from the first node in case of singly linked list.
A) i-only
B) ii-only
C) Both i and ii
D) None of both

34. The advantage of …………….. is that they solve the problem if sequential storage representation. But disadvantage in that is they are sequential lists.
A) Lists
C) Trees
D) Queues

35. What will be the value of top, if there is a size of stack STACK_SIZE is 5
A) 5
B) 6
C) 4

D) Queues

35. What will be the value of top, if there is a size of stack STACK_SIZE is 5
A) 5
B) 6
C) 4
D) None

36. ………… is not the operation that can be performed on queue.
A) Insertion
B) Deletion
C) Retrieval
D) Traversal

37. There is an extra element at the head of the list called a ……….
A) Antinel
B) Sentinel

38. A graph is a collection of nodes, called ………. And line segments called arcs or ……….. that connect pair of nodes.
A) vertices, edges
B) edges, vertices
C) vertices, paths
D) graph node, edges

39. A ……….. is a graph that has weights of costs associated with its edges.
A) Network
B) Weighted graph
C) Both A and B
D) None A and B

40. In general, the binary search method needs no more than ……………. comparisons.
A) [log2n]-1
B) [logn]+1
C) [log2n] D) [log2n]+1

41. Which of the following is not the type of queue?
A) Ordinary queue
B) Single ended queue
C) Circular queue
D) Priority queue

42. The property of binary tree is
A) The first subset is called left subtree
B) The second subtree is called right subtree
C) The root cannot contain NULL

D) The right subtree can be empty
43. State true or false. i) The degree of root node is always zero. ii) Nodes that are not root and not leaf are called as internal nodes.
A) True, True
B) True, False
C) False, True
D) False, False

44. Any node is the path from the root to the node is called
A) Successor node
B) Ancestor node
C) Internal node
D) None of the above
45. State true of false. i) A node is a parent if it has successor nodes. ii) A node is child node if out degree is one.
A) True, True
B) True, False
C) False, True
D) False, False

46. ………………. is not an operation performed on linear list
a) Insertion b) Deletion
c) Retrieval d) Traversal

A) only a,b and c
B) only a and b
C) All of the above
D) None of the above

47. Which is/are the application(s) of stack
A) Function calls
B) Large number Arithmetic
C) Evaluation of arithmetic expressions
D) All of the above

48. A …………… is an acyclic digraph, which has only one node with indegree 0, and other nodes have indegree 1.
A) Directed tree
B) Undirected tree
C) Dis-joint tree
D) Direction oriented tree
49. …………………. Is a directed tree in which outdegree of each node is less than or equal to two.
A) Unary tree
B) Binary tree
C) Trinary tree
D) Both B and C

50. State true or false. i) An empty tree is also a binary tree. ii) In strictly binary tree, the out-degree of every node is either o or 2.
A) True, False
B) False, True
C) True, True
D) False, False