Queues

Answer: d) A data structure that allows elements to be inserted at one end and removed from the other end

Explanation: A queue is a data structure that follows the First-In-First-Out (FIFO) principle, meaning that the element that is inserted first will be the first to be removed. It allows elements to be inserted at one end (rear end) and removed from the other end (front end).

Answer: c) Enqueue and dequeue

Explanation: The two primary operations on a queue are enqueue, which adds an element to the rear end of the queue, and dequeue, which removes the element from the front end of the queue.

Answer: b) Linked list

Explanation: A linked list is commonly used to implement a queue since it allows for efficient insertion and deletion at both ends of the list.

Answer: b) An error occurs

Explanation: Dequeueing an element from an empty queue is considered an error since there is no element to remove.

Answer: c) Storing data in a database

Explanation: While a queue can be used to store data temporarily in memory, it is not commonly used to store data in a database.

Answer: a) O(1)

Explanation: The enqueue and dequeue operations on a queue implemented using an array have a time complexity of O(1), since they simply involve adding or removing an element from the beginning or end of the array.

Answer: d) It allows for efficient insertion and deletion at both ends

Explanation: The primary advantage of using a queue is that it allows for efficient insertion and deletion at both ends, making it useful for applications that require temporary storage of data in a specific order.

Answer: b) Finding the shortest path between two nodes in a graph

Explanation

Answer: d) Binary queue

Explanation: A binary queue is not a type of queue in data structure. Instead, it is a term used in computer science to describe a data structure that is similar to a binary heap.

Answer: b) A queue allows elements to be inserted and removed from both ends, while a stack only allows elements to be inserted and removed from one end.

Explanation: The primary difference between a queue and a stack is that a queue allows elements to be inserted and removed from both ends, while a stack only allows elements to be inserted and removed from one end. Additionally, a queue follows the First-In-First-Out (FIFO) principle, while a stack follows the Last-In-First-Out (LIFO) principle.