Question 12 1 Point A queue follows the principle of: Last-in, First-out (LIFO) First-in, First-out (FIFO) Random In, Random Out (RIRU) None of the above Question 13 1 Point How can you add an element to a queue? Insert it anywhere Insert it at the beginning Insert it at the end (back) You cannot add elements to a queue Question 14 1 Point How can you remove an element from a queue? Remove it anywhere Remove the last element added Remove the first element added (front) You cannot remove elements from a queue Question 15 1 Point What is the name for the first element that can be removed from a queue? Top element First element Current element Head element Question 16 1 Point What real-world scenario is similar to a queue? A stack of plates A branching pipe A waiting line at a store A conveyor belt moving in a circle Question 17 1 Point Queues are considered: A complex data structure A fundamental data structure An obsolete data structure Rarely used in applications Question 18 1 Point You can access any element in a queue at any time. True False Question 19 1 Point Queues are used in computer networks to handle incoming data packets. True False Question 20 1 Point Reservation centers use queues to manage customer requests. True False Question 21 1 Point A newly created queue is always full. True False

Where does the new element be inserted in the queue?a)At the center of the queueb)At the head of the queuec)At the tail of the queued)None of the mentioned

What happens when you try to enqueue an element into a full Circular Queue?a)The oldest element in the queue is automatically dequeued.b)The new element is placed at the front of the queue.c)An error is thrown, and the enqueue operation fails.d)The new element overwrites the oldest element in the queue.

A queue is an abstract data type that maintains the order in which elements were added to it, allowing the oldest elements to be removed from the front and new elements to be added to the rear. This is called a First-In-First-Out (FIFO) data structure because the first element added to the queue (i.e., the one that has been waiting the longest) is always the first one to be removed.A basic queue has the following operations:Enqueue: add a new element to the end of the queue.Dequeue: remove the element from the front of the queue and return it.In this challenge, you must first implement a queue using two stacks. Then process queries, where each query is one of the following types:1 x: Enqueue element into the end of the queue.2: Dequeue the element at the front of the queue.3: Print the element at the front of the queue.Input FormatThe first line contains a single integer, , denoting the number of queries.Each line of the subsequent lines contains a single query in the form described in the problem statement above. All three queries start with an integer denoting the query , but only query is followed by an additional space-separated value, , denoting the value to be enqueued.ConstraintsIt is guaranteed that a valid answer always exists for each query of type .Output FormatFor each query of type , print the value of the element at the front of the queue on a new line.Sample InputSTDIN Function----- --------10 q = 10 (number of queries)1 42 1st query, enqueue 422 dequeue front element1 14 enqueue 423 print the front element1 28 enqueue 283 print the front element1 60 enqueue 601 78 enqueue 782 dequeue front element2 dequeue front elementSample Output1414ExplanationPerform the following sequence of actions:Enqueue ; .Dequeue the value at the head of the queue, ; .Enqueue ; .Print the value at the head of the queue, ; .Enqueue ; .Print the value at the head of the queue, ; .Enqueue ; .Enqueue ; .Dequeue the value at the head of the queue, ; .Dequeue the value at the head of the queue, ; .

ProblemSubmissionsLeaderboardDiscussionsA queue is an abstract data type that maintains the order in which elements were added to it, allowing the oldest elements to be removed from the front and new elements to be added to the rear. This is called a First-In-First-Out (FIFO) data structure because the first element added to the queue (i.e., the one that has been waiting the longest) is always the first one to be removed.A basic queue has the following operations:Enqueue: add a new element to the end of the queue.Dequeue: remove the element from the front of the queue and return it.In this challenge, you must first implement a queue using two stacks. Then process queries, where each query is one of the following types:1 x: Enqueue element into the end of the queue.2: Dequeue the element at the front of the queue.3: Print the element at the front of the queue.Input FormatThe first line contains a single integer, , denoting the number of queries.Each line of the subsequent lines contains a single query in the form described in the problem statement above. All three queries start with an integer denoting the query , but only query is followed by an additional space-separated value, , denoting the value to be enqueued.ConstraintsIt is guaranteed that a valid answer always exists for each query of type .Output FormatFor each query of type , print the value of the element at the front of the queue on a new line.Sample InputSTDIN Function----- --------10 q = 10 (number of queries)1 42 1st query, enqueue 422 dequeue front element1 14 enqueue 423 print the front element1 28 enqueue 283 print the front element1 60 enqueue 601 78 enqueue 782 dequeue front element2 dequeue front elementSample Output1414ExplanationPerform the following sequence of actions:Enqueue ; .Dequeue the value at the head of the queue, ; .Enqueue ; .Print the value at the head of the queue, ; .Enqueue ; .Print the value at the head of the queue, ; .Enqueue ; .Enqueue ; .Dequeue the value at the head of the queue, ; .Dequeue the value at the head of the queue, ; .

A double-ended queue allows A. adding elements at one end and removing them from both ends B. adding elements at one end, removing them from the other end, and viewing (first) elements at either end. C. adding, removing, and viewing elements at either end. D. adding elements at both ends and removing them from one end E. none of the above