Question

A. Starting with an initially empty stack, after 6 push operations, 3 pop operations, and 2...

A. Starting with an initially empty stack, after 6 push operations, 3 pop operations, and 2 push operations, the number of elements in the stack would be:

B. Starting with an initially empty queue, after 5 enqueue operations, 4 dequeue operations, and 6 enqueue operations, the number of elements in the queue would be:

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Answer #1

A)

Initially stack is empty, after 6 push operations there will be total of 6 elements present in the stack

after 3 pop operations 3 elements will be removed from stack so 3 elements are remaining in the stack

and 2 push operations so 2 will be pushed into stack so total of 2+3=5 elements will be present in stack

B)

Initially queue is empty, after 5 enqueue operations there will be total of 5 elements present in the queue

after 4 dequeue operations 4 elements will be removed from queue so 1 element is remaining in the queue

and 6 enqueue operations so 6 will be inserted into queue so total of 6+1=7 elements will be present in queue

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