Queues

If the insertion and deletion happens from both the ends then the queue is called a______Queue

• a) Deque

• b) Header

• c) Queue

• d) Circular Queue

If the elements “A”, “B”, “C” and “D” are placed in a queue and are deleted one at a time, in what order will they be removed?

• a) ABCD

• b) DCBA

• c) DCAB

• d) ABDC

In linked list implementation of a queue, where does a new element be inserted?

• At the head of link list

• At the centre position in the link list

• At the tail of the link list

• None of the mentioned

In linked list implementation of a queue, from where is the item deleted?

• At the head of link list

• At the centre position in the link list

• At the tail of the link list

• None of the mentioned

In linked list implementation of a queue, the important condition for a queue to be empty is?

• FRONT is null

• REAR is null

• LINK is empty

• None of the mentioned

In a circular queue, how do you increment the rear end of the queue?

• rear++

• (rear+1) % Number of Item

• (rear % Number of Item)+1

• rear–

A circular queue is implemented using an array of size 10. The array index starts with 0, front is 6, and rear is 9. The insertion of next element takes place at the array index.

• 0

• 7

• 9

• 10

What is the reason for using a "circular queue" instead of a regular one?

• running time of enqueue() is improved

• reuse empty spaces

• you can traverse all the elements more efficiently

• none of the above

In Queue Insertion & Deletion take place at ________________.

• same end

• first end

• different end

• last end

If the numbers 5, 10, 3, 42 are enqueued onto a queue in that order, what does dequeue return?

• 5

• 10

• 3

• 42