Data Structure and Algorithms (DSA) MCQs with answers Page - 76

Here, you will find a collection of MCQ questions on Data Structure and Algorithms (DSA). Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Which data structure is needed to convert infix notation to postfix notation?

  • (A) Branch
  • (B) Tree
  • (C) Queue
  • (D) Stack

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Q. The prefix form of A-B/ (C * D ^ E) is?

  • (A) -/*^ACBDE
  • (B) -ABCD*^DE
  • (C) -A/B*C^DE
  • (D) -A/BC*^DE

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Q. What is the result of the following operation? Top (Push (S, X))

  • (A) X
  • (B) X+S
  • (C) S
  • (D) none

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Q. The prefix form of an infix expression (p + q) – (r * t) is?

  • (A) + pq – *rt
  • (B) – +pqr * t
  • (C) – +pq * rt
  • (D) – + * pqrt

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Q. Which data structure is used for implementing recursion?

  • (A) Queue
  • (B) Stack
  • (C) Array
  • (D) List

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Q. When an operand is read, which of the following is done?

  • (A) It is placed on to the output
  • (B) It is placed in operator stack
  • (C) It is ignored
  • (D) Operator stack is emptied

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Q. What is the time complexity of enqueue operation?

  • (A) O(logn)
  • (B) O(nlogn)
  • (C) O(n)
  • (D) O(1)

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Q. What is the need for a circular queue?

  • (A) effective usage of memory
  • (B) easier computations
  • (C) to delete elements based on priority
  • (D) implement LIFO principle in queues

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Q. What is the space complexity of a linear queue having n elements?

  • (A) O(n)
  • (B) O(nlogn)
  • (C) O(logn)
  • (D) O(1)

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Q. What is the maximum number of children that a binary tree node can have?

  • (A) 0
  • (B) 1
  • (C) 2
  • (D) 3

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