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Stacks and Queues, A queue is an ordered data structure where elements are…
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A queue is an ordered data structure where elements are inserted at the rear and removed from the front, ensuring sequential processing.
Implementation
Array-Based
Provides fast O(1) access due to contiguous memory storage, making it efficient for quick retrievals. However, resizing is costly (O(n)), and insertions or deletions require shifting elements, making them less efficient for dynamic use.
Linked List-Based
Supports dynamic resizing without shifting elements, making insertions and deletions more efficient. However, it has additional memory overhead due to pointers and slower O(n) access time for retrievals.
Possible Uses
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Task scheduling (CPU scheduling, print jobs).
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Types
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Circular Queue
operates in a circular manner where the rear of the queue wraps around to the front when the end of the allocated memory is reached.
This prevents memory wastage and eliminates the need to shift elements when performing enqueue and dequeue operations.
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A stack is a restricted data structure where insertion and deletion happen only at one end, called the "top".
Implementation
Array-Based
Provides fast O(1) access due to contiguous memory storage, making it efficient for quick retrievals. However, resizing is costly (O(n)), and insertions or deletions require shifting elements, making them less efficient for dynamic use.
Linked List-Based
Supports dynamic resizing without shifting elements, making insertions and deletions more efficient. However, it has additional memory overhead due to pointers and slower O(n) access time for retrievals.
Possible Uses
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Syntax parsing (e.g., balancing parentheses).
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A linear data structure that follows the Last-In, First-Out (LIFO) principle, meaning the last element added is the first one removed.
A linear data structure that follows the First-In, First-Out (FIFO) principle, meaning the first element added is the first one removed.
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