DATA STRUCTURE MCQS

............ 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

A) Stack

A binary search tree whose left subtree and right subtree differ in height by at most 1 unit is called A) AVL tree B) Red-black tree C) Lemma tree D) None of the above

A) AVL tree

A ............... is an acyclic digraph, which has only one node with in degree 0, and other nodes have in degree 1. A) Directed tree B) Undirected tree C) Dis-joint tree D) Direction oriented tree

A) Directed tree

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

A) Last in first out

Inserting an item into the stack when stack is not full is called ............. Operation and deletion of item from the stack, when stack is not empty is called ...........operation. A) push, pop B) pop, push C) insert, delete D) delete, insert

A) push, pop

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

B) Ancestor node

...................... Is a directed tree in which outdegree of each node is less than or equal to two. A) Unary tree B) Binary tree C) Dinary tree D) Both B and C

B) Binary tree

................ 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

B) Queue

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

B) Single ended queue

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

B) True, False

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

C) False, True

.................... level is where the model becomes compatible executable code A) Abstract level B) Application level C) Implementation level D) All of the above

C) Implementation level

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

C) True, True

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

C) True, True

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

D) All of the above

Which of 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

D) All of the above

............... is not the component of data structure. A) Operations B) Storage Structures C) Algorithms D) None of above

D) None of above

................... 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

D) None of the above

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

D) None of the above

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

D) The right subtree can be empty