C Programming Important Questions and Answers Set - 6
41. The _______ memory allocation function modifies the previous allocated space.
A. calloc
B. free
C. malloc
D. realloc
Answer: D. realloc
42. Number of binary trees formed with 5
nodes are
A. 30
B. 36
C. 108
D. 42
Answer: D. 42
43. The “C” language is
A. Context free language
B. Context sensitive language
C. Regular language
D. None of the above
Answer: A. Context free language
44. The worst case time complexity of AVL tree is better in comparison to binary search tree for
A. Search and Insert Operations
B. Search and Delete Operations
C. Insert and Delete Operations
D. Search, Insert and Delete Operations
Answer: D. Search, Insert and Delete Operations
45. In which tree, for every node the height of its left subtree and right subtree differ almost by one?
A. Binary search tree
B. AVL tree
C. Threaded Binary Tree
D. Complete Binary Tree
Answer: B. AVL tree
46. C is ______ Language?
A. Low Level
B. High Level
C. Assembly Level
D. Machine Level
Ans- A. Low level
47. The Default Parameter Passing
Mechanism is called as
A. Call by Value
B. Call by Reference
C. Call by Address
D. Call by Name
Answer: A. Call by Value
48. What is Dequeue?
A. Elements can be added from front
B. Elements can be added to or removed from
either the front or rear
C. Elements can be added from rear
D. None of the above
Answer: B. Elements can be added to or removed from either the front or rear
49. In which linked list last node address is
null?
A. Doubly linked list
B. Circular list
C. Singly linked list
D. None of the above
Answer: C. Singly linked list
50. Which is the correct syntax to declare
constant pointer?
A. int *const constPtr;
B. *int constant constPtr;
C. const int *constPtr;
D. A and C both
Answer: D. A and C both
