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Queue FIFO
Queue FIFO Definition: A queue FIFO (First-In, First-Out) is a linear data structure in which the first element added to the queue is the first one to b...
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Queue FIFO Definition: A queue FIFO (First-In, First-Out) is a linear data structure in which the first element added to the queue is the first one to b...
Queue FIFO
Definition:
A queue FIFO (First-In, First-Out) is a linear data structure in which the first element added to the queue is the first one to be retrieved. The elements are added to the rear of the queue, and the front element is removed from the rear.
Example:
| Element |
|---|---|
| A |
| B |
| C |
| D |
| E |
How it works:
The queue is implemented as a linked list.
The head pointer points to the first element in the queue.
The tail pointer points to the last element in the queue.
When a new element is added to the rear, it is inserted at the end of the linked list.
The front element is removed from the rear when the rear pointer reaches the end of the queue.
Applications:
Message passing: Queues are commonly used in message passing algorithms, where multiple processes can exchange messages with each other.
Job scheduling: Queues can be used to schedule and execute tasks in order.
Priority queues: Queues with priority levels can be used to manage tasks based on their priority.
Database management: Databases use queues to implement locking mechanisms, ensuring that only one transaction can modify a record at a time