Data Structure and Algorithms (DSA) MCQs with answers Page - 45

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Q. First link node of list is accessed from a pointer named

  • (A) tail
  • (B) head
  • (C) terminator
  • (D) initiator

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Q. A linked list is made up of a set of objects known as

  • (A) nodes
  • (B) arrays
  • (C) entities
  • (D) instances

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Q. How do you calculate the pointer difference in a memory efficient double linked list?

  • (A) head xor tail
  • (B) pointer to previous node xor pointer to next node
  • (C) pointer to previous node – pointer to next node
  • (D) pointer to next node – pointer to previous node

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Q. A data structure where elements can be added or removed at either end but not in the middle is called …

  • (A) arrays
  • (B) stacks
  • (C) queues
  • (D) deque

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Q. The postfix form of the expression (A + B)∗(C∗D − E)∗F / G is

  • (A) ab + cd∗e − fg /∗∗
  • (B) / ab + cd ∗ e − f ∗∗g /
  • (C) ab + cd ∗ e − ∗f ∗ g /
  • (D) ab + cde ∗ − ∗ f ∗ g /

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Q. What is the postfix form of the following prefix expression -A/B*C$DE ?

  • (A) abcde$*/-
  • (B) a-bcde$*/-
  • (C) abc$ed*/-
  • (D) a-bcde$*/

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Q. The data structure required to evaluate a postfix expression is

  • (A) queue
  • (B) stacks
  • (C) array
  • (D) linked-list

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Q. What is the postfix form of the following prefix: *+ab–cd

  • (A) ab+cd–*
  • (B) abc+*–
  • (C) ab+*cd–
  • (D) ab+*cd–

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Q. A queue is a,

  • (A) fifo (first in first out) list
  • (B) lifo (last in first out) list
  • (C) ordered array
  • (D) linear tree

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Q. In stack terminology, the __________operations are known as push and pop operations respectively.

  • (A) delete
  • (B) insert
  • (C) both (a) and (b)
  • (D) none of the above

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