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

Q1: What does deque stand for in STL?

A. Double-ended queue B. Dynamic queue C. Dense queue D. Data queue

Q2: Which operations are efficient on a deque?

A. Insertion and deletion at both front and back B. Insertion only at front C. Deletion only at back D. Random access only

Q3: Does STL deque support random access?

A. Yes B. No C. Only partial D. Depends on implementation

Q4: Which STL container provides faster insertion/deletion at front than vector?

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

Q5: What is the default underlying data structure of deque?

A. Dynamic array of fixed-size arrays (blocks) B. Singly linked list C. Doubly linked list D. Binary tree

Q6: Which method adds an element to the front of a deque?

A. push_front() B. push_back() C. insert() D. append()

Q7: Which method adds an element to the back of a deque?

A. push_back() B. push_front() C. insert() D. append()

Q8: Which STL container is more memory efficient than list but slower for insertion/deletion in the middle?

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

Q9: Which method removes the last element from deque?

A. pop_back() B. pop_front() C. remove() D. clear()

Q10: Which method removes the first element from deque?

A. pop_front() B. pop_back() C. remove() D. clear()

Q11: Can deque grow dynamically in size?

A. Yes B. No C. Only fixed size D. Depends on allocator

Q12: Does deque support iterators?

A. Yes, random access iterators B. No iterators C. Only forward iterators D. Only bidirectional iterators

Q13: Which of the following containers allows insertion and deletion at both ends?

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

Q14: Is deque implemented as a linked list?

A. No B. Yes C. Partially D. Only in some implementations

Q15: Which STL container provides better performance for random access: vector or deque?

A. vector B. deque C. both same D. depends on size

Q16: Can deque be used as a stack?

A. Yes, using push_back and pop_back B. No C. Only as queue D. Only as list

Q17: Which method returns the number of elements in a deque?

A. size() B. length() C. count() D. capacity()

Q18: Which method removes all elements from a deque?

A. clear() B. destroy() C. release() D. remove_all()

Quiz for Containers deque