Stacks and Queues

Explain the array implementation of stacks with an example.

• Array implementation of stacks does not allow for the removal of elements

• The array implementation of stacks allows us to push and pop elements from the middle of the array

• In array implementation of stacks, elements can only be added to the beginning of the array

• The array implementation of stacks allows us to push and pop elements from the end of the array, simulating the behavior of a stack. For example, if we have an array [1, 2, 3] representing a stack, we can push 4 by adding it to the end of the array, and pop elements by removing them from the end of the array.

What are the common stack operations? Provide a brief explanation for each.

• insert, delete, and modify

• up, down, and sideways

• add, remove, and update

• push, pop, and peek

Give an example of an application where a stack data structure is used.

• Online shopping websites

• Video editing software

• Web browsers

• Email clients

Differentiate between stacks and queues based on their characteristics.

• Stacks and queues both follow the Last In First Out (LIFO) principle.

• Stacks and queues both follow the First In First Out (FIFO) principle.

• Stacks follow the Last In First Out (LIFO) principle, while queues follow the First In First Out (FIFO) principle.

• Stacks follow the First In First Out (FIFO) principle, while queues follow the Last In First Out (LIFO) principle.

Explain the enqueue and dequeue operations in a queue with an example.

• Enqueue adds an element to the front of the queue, while dequeue removes an element from the rear of the queue.

• Enqueue adds an element to the rear of the queue, while dequeue removes an element from the front of the queue.

• Enqueue adds an element to the front of the queue, while dequeue removes an element from the middle of the queue.

• Enqueue removes an element from the front of the queue, while dequeue adds an element to the rear of the queue.

What are the push and pop operations in a stack? Provide an example for each.

• Push: Example - Multiplying 3 to the stack

• Push: Example - Removing the top element from the stack

• Push: Example - Adding 5 to the stack Pop: Example - Removing the top element from the stack

• Pop: Example - Adding a new element to the stack

How are stacks and queues used in real-world scenarios? Provide two examples for each.

• Stacks and queues are not used in real-world scenarios.

• Two examples of stacks in real-world scenarios are the undo feature in software applications and the call stack in programming. Two examples of queues in real-world scenarios are the line at a grocery store and the print queue in a computer system.

• Two examples of stacks in real-world scenarios are the line at a grocery store and the print queue in a computer system.

• Two examples of queues in real-world scenarios are the undo feature in software applications and the call stack in programming.

Compare the time complexity of enqueue and dequeue operations in a queue.

• O(log n)

• O(n^2)

• O(1)

• O(n)

Discuss the similarities and differences between stacks and queues in terms of their data structure.

• Stacks and queues both use the First In First Out (FIFO) principle.

• Stacks use the First In First Out (FIFO) principle, while queues use the Last In First Out (LIFO) principle.

• Stacks use the Last In First Out (LIFO) principle, while queues use the First In First Out (FIFO) principle.

• Stacks and queues both use the Last In First Out (LIFO) principle.

Explain the concept of LIFO and FIFO in the context of stacks and queues.

• LIFO and FIFO are concepts used in accounting to determine the order of financial transactions.

• LIFO and FIFO are concepts used in gardening to determine the order of planting and harvesting crops.

• LIFO and FIFO are concepts used in cooking to determine the order of ingredients added to a recipe.

• LIFO and FIFO are concepts used in stacks and queues to determine the order in which elements are added and removed.