Data Structures MCQs with Answers
Practice important Data Structures MCQs with answers and explanations.
Multiple Choice Questions
Q101: What does the remove method do in the CList class?
- A: Adds an element
- B: Moves to the next element
- C: Retrieves the current element
- D: Removes the current element
View Answer
D
Q102: How does a stack differ from a queue?
- A: Stack is FIFO, queue is LIFO
- B: Stack is LIFO, queue is FIFO
- C: Stack is circular, queue is linear
- D: Stack allows random access
View Answer
B
Q103: What is the primary characteristic of a stack data structure?
- A: FIFO (First In, First Out)
- B: LIFO (Last In, First Out)
- C: FILO (First In, Last Out)
- D: LILO (Last In, Last Out)
View Answer
B
Q104: Why do we use the isFull() method in stack implementation using arrays?
- A: To check if the array is empty
- B: To check the size of the stack
- C: To prevent adding elements beyond capacity
- D: To allocate more memory dynamically
View Answer
C
Q105: What is the main advantage of using a linked list over an array for stack implementation?
- A: Constant time complexity
- B: Dynamic memory allocation
- C: No need for isEmpty() method
- D: Easier to implement operations
View Answer
B
Q106: In a stack implemented using a linked list, where is the new element inserted?
- A: At the start of the list
- B: At the end of the list
- C: In the middle of the list
- D: It depends on implementation
View Answer
A
Q107: How is the pop() operation implemented in a linked list-based stack?
- A: Removes the last node
- B: Removes the first node
- C: Removes a random node
- D: Replaces the first node value
View Answer
B
Q108: Which method retrieves the top element of the stack without removing it?
- A: pop()
- B: push()
- C: isEmpty()
- D: top()
View Answer
D
Q109: What does the isEmpty() method check in a stack implementation?
- A: If the stack is full
- B: If the stack has any elements
- C: If the head pointer is NULL
- D: If memory allocation has failed
View Answer
C
Q110: Which of the following is not required when implementing a stack using a linked list?
- A: isFull()
- B: isEmpty()
- C: push()
- D: pop()
View Answer
A