Free Test Containers stack – C++ Lan...

Q1: What type of data structure is a stack?

A. Last In First Out (LIFO) B. First In First Out (FIFO) C. Random Access D. Priority Queue

Q2: Which STL container is typically used to implement a stack?

A. deque B. list C. vector D. set

Q3: Which function is used to add an element to the top of the stack?

A. push() B. pop() C. top() D. insert()

Q4: Which function removes the top element from the stack?

A. pop() B. push() C. top() D. remove()

Q5: How to access the top element of a stack without removing it?

A. top() B. front() C. back() D. peek()

Q6: What does the empty() function return?

A. True if the stack is empty B. Number of elements in stack C. Top element value D. Removes the top element

Q7: What is the time complexity of push and pop operations in stack?

A. O(1) B. O(n) C. O(log n) D. O(n^2)

Q8: Which header file must be included to use stack in STL?

A. <stack> B. <vector> C. <list> D. <deque>

Q9: Can you iterate over elements of a stack directly?

A. No, stack does not provide iterators B. Yes, using begin() and end() C. Yes, using iterator() D. Yes, using for loop

Q10: Is stack a container or a container adapter?

A. Container adapter B. Container C. Function D. Algorithm

Q11: Which underlying container is NOT allowed by default in STL stack?

A. set B. deque C. vector D. list

Q12: How do you check if a stack is empty?

A. Using empty() B. Using size() C. Using top() D. Using is_empty()

Q13: Which of the following is NOT a stack operation?

A. insert() B. push() C. pop() D. top()

Q14: Can stack be used to reverse elements?

A. Yes B. No C. Only with vector D. Only with deque

Q15: What will happen if pop() is called on an empty stack?

A. Undefined behavior B. Returns false C. Throws exception D. Returns null

Q16: Which container adapter does STL stack resemble?

A. Stack data structure B. Queue C. Priority queue D. Deque

Q17: What is the default underlying container for STL stack?

A. deque B. vector C. list D. set

Q18: Can you access elements other than the top element in a stack?

A. No B. Yes, using iterators C. Yes, using at() D. Yes, using indexing

Q19: Which of these functions does NOT modify the stack?

A. top() B. push() C. pop() D. clear()

Quiz for Containers stack