Questions and Answers
In a stack, all addition and deletion operations are performed from the bottom of the stack
False
The insertion operation in a stack is referred to as pop
False
Stack is a data structure that follows the Last-in First-out (LIFO) principle
True
A stack is said to be empty when it contains no elements, known as underflow
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Stacks are commonly implemented using arrays or linked lists
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Queue is an ordered collection of items in which new data items are added at the end, or tail, of the queue while other data are removed from the front, or head, of the queue.
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How a Queue Works.
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Additional primitives can be defined: o Is_Empty(): reports whether the queue is empty o Is_Full(): reports whether the queue is full
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The main primitive operations of a queue are known as: o Insert(): adds an item to the queue. o Remove(): deletes an item from the queue.
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A queue is referred to as a FIFO structure (First-In First-Out).
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Study Notes
Stack Data Structure
- In a stack, all addition and deletion operations are performed from the top (not bottom) of the stack.
- The insertion operation in a stack is referred to as push (not pop).
- A stack follows the Last-in First-out (LIFO) principle.
- A stack is said to be empty when it contains no elements, known as underflow.
- Stacks are commonly implemented using arrays or linked lists.
Queue Data Structure
- A queue is an ordered collection of items in which new data items are added at the end (tail) of the queue.
- Data items are removed from the front (head) of the queue.
- The main primitive operations of a queue are:
- Insert(): adds an item to the queue.
- Remove(): deletes an item from the queue.
- A queue is referred to as a FIFO structure (First-In First-Out).
- Additional primitives can be defined:
- Is_Empty(): reports whether the queue is empty.
- Is_Full(): reports whether the queue is full.
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