Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Multiple Choice Questions
Q171: What is the purpose of the isFull() function in a queue implemented with an array?
- A: Checks if the queue is empty
- B: Determines if the array has reached its limit
- C: Removes an element from the queue
- D: Adds a new element to the queue
View Answer
B
Q172: In C++, where are static variables declared within a function stored?
- A: Stack
- B: Heap
- C: Code section
- D: Static data section
View Answer
D
Q173: Which data structure is typically used to simulate real-world processes like bank operations?
- A: Stack
- B: Queue
- C: Array
- D: Linked list
View Answer
B
Q174: What is the primary purpose of a simulation program?
- A: To simulate memory allocation
- B: To model real-world phenomena
- C: To optimize code execution
- D: To manage stack operations
View Answer
B
Q175: What happens to the front pointer after a dequeue() operation in a linked-list queue implementation?
- A: It remains the same
- B: It moves to the next node
- C: It points to NULL
- D: It points to the last element
View Answer
B
Q176: Which function checks if a queue is empty?
- A: isFull()
- B: front()
- C: isEmpty()
- D: dequeue()
View Answer
C
Q177: What happens to the rear pointer after an enqueue() operation in a queue implemented using a linked list?
- A: It remains the same
- B: It moves to the previous node
- C: It moves to the newly created node
- D: It becomes NULL
View Answer
C
Q178: In a queue, which of the following is not a valid operation?
- A: enqueue()
- B: dequeue()
- C: front()
- D: pop()
View Answer
D
Q179: What happens to the memory allocated for a local variable after the function call is completed?
- A: It remains allocated
- B: It is deallocated
- C: It is moved to the heap
- D: It is stored in the static data section
View Answer
B
Q180: In an array implementation of a queue, what index change happens when a new element is added?
- A: front increases
- B: rear increases
- C: front decreases
- D: rear decreases
View Answer
B