Data Structure and Algorithms (DSA) MCQs with answers Page - 57

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Q. Which of the following way follows in Post order traversal?

  • (A) Root -> Left sub tree -> Right sub tree.
  • (B) Root -> Right sub tree -> Left sub tree.
  • (C) Left sub tree -> Root -> Right sub tree.
  • (D) Left sub tree -> Right sub tree -> Root.

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Q. A _________is a linked list which always contains a special node called the header node, at the beginning of the list.

  • (A) Doubly Linked List.
  • (B) Circular List.
  • (C) Header Linked List.
  • (D) None.

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Q. _______________is a header list where the last node points back to the header node.

  • (A) Doubly header List.
  • (B) Singly header List.
  • (C) Grounder Header List.
  • (D) Circular Header List.

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Q. The advantage of a two-way list and a circular header list is combined into a ________.

  • (A) two-way circular header list.
  • (B) two-way circular list.
  • (C) two-way header circular list.
  • (D) None.

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Q. The pointer of the last node contains a special value called_____________.

  • (A) null pointer.
  • (B) index pointer.
  • (C) pointer link.
  • (D) address pointer.

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Q. The OS of a computer may periodically collect all the deleted space onto the free storage list. This technique is called______________.

  • (A) buffering.
  • (B) garbage collection.
  • (C) deal location.
  • (D) buffer collection.

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Q. Important part of any compiler is the construction and maintenances of a dictionary, this types of dictionary are called______________.

  • (A) symbol table.
  • (B) index table.
  • (C) grammar table.
  • (D) pointer table.

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Q. The data structure required to check whether an expression contains balanced parenthesis is?

  • (A) queue
  • (B) stack
  • (C) linked list
  • (D) file

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Q. What are the advantages of arrays?

  • (A) Easier to store elements of same data type
  • (B) Used to implement other data structures like stack and queue
  • (C) Convenient way to represent matrices as a 2D array
  • (D) All of the mentioned

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Q. The number of possible ordered trees with three nodes A,B,C is?

  • (A) 16
  • (B) 12.
  • (C) 10
  • (D) 6

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