What is the value of front when queue is empty?
What is the value of front when queue is empty?
Queue is said to be empty when the value of front is at -1 or the value of front becomes greater than rear (front > rear).
What happens when a queue is empty?
queue::empty() is used to check whether the associated queue container is empty or not. This function returns either true or false, if the queue is empty (size is 0) then the function returns true, else if the queue is having some value then it will return false.
What is the front of a queue called?
The list holds the front part of the queue. The list holds the remaining elements (a.k.a., the rear of the queue) in reverse order.
What is the front and rear of a queue?
A queue is structured as an ordered collection of items which are added at one end, called the “rear,” and removed from the other end, called the “front.” The queue operations are: Queue() creates a new queue that is empty.
What is the value of variables rear and front when queue is empty?
In the beginning when the queue is empty, FRONT and REAR point to 0 index in the array.
Which of the following C functions can be used to check if the queue is empty or not?
empty() function
empty() function is used to check if the queue container is empty or not.
How do I check if a queue is empty?
queue. isEmpty() returns true if the queue is empty; otherwise, it returns false .
How do you initialize front and rear in queue?
Initialize queue. front as -1 or 0 in Designing Circular Queue
- MyCircularQueue(k) : Constructor, set the size of the queue to be k.
- Front : Get the front item from the queue.
- Rear : Get the last item from the queue.
- enQueue(value) : Insert an element into the circular queue.
What is front in queue in C?
queue::front() This function is used to reference the first or the oldest element of the queue container. This function can be used to fetch the first element of a queue.
When a queue is empty what is the value of rear?
When Queue Empty : REAR was equal to FRONT when empty ( because in the starting before filling the queue FRONT = REAR = 0 ) Hence Option A is correct.
How do you test for an empty queue in C?
isEmpty/isFull- checks if the queue is empty or full.