Which method of Stack returns the element on the top of stack by not removing it?

Which method of Stack returns the element on the top of stack by not removing it?

peek

Which method checks if there are elements in the stack?

contains() method is used to check whether a specific element is present in the Stack or not. So basically it is used to check if a Stack contains any particular element or not. Parameters: This method takes a mandatory parameter element which is of the type of Stack.

Which method is used to access the data at the top of the stack without removing it?

Peek Method

Which method can be used to determine whether the queue is full or there is a room for another data?

Adding an element will be performed after checking whether the queue is full or not. If rear < n which indicates that the array is not full then store the element at arr[rear] and increment rear by 1 but if rear == n then it is said to be an Overflow condition as the array is full.

What method is used to remove an element from a queue?

The remove() and poll() methods remove and return the head of the queue. Exactly which element is removed from the queue is a function of the queue’s ordering policy, which differs from implementation to implementation.

What are the operations of queue?

Queue and its basic operations

• Queue is a data structure following the FIFO(First In, First Out) principle. You can imagine an actual queue for a ticket counter for visual aid.
• Enqueue Operation. Enqueue means inserting an element in the queue.
• Dequeue Operation.
• Front Operation.
• isEmpty: Check if the queue is empty.

How do I know if my queue is full?

Check whether queue is Full – Check ((rear == SIZE-1 && front == 0) || (rear == front-1)). If it is full then display Queue is full. If queue is not full then, check if (rear == SIZE – 1 && front != 0) if it is true then set rear=0 and insert element.

What is the advantage of queue?

Queues have the advantages of being able to handle multiple data types and they are both flexible and flexibility and fast. Moreover, queues can be of potentially infinite length compared with the use of fixed-length arrays.

What are the disadvantages of queue?

Moreover, queues can be of potentially infinite length compared with the use of fixed-length arrays. A major disadvantage of a classical queue is that a new element can only be inserted when all of the elements are deleted from the queue.

What is the disadvantage of linear queue?

In a linear queue, the traversal through the queue is possible only once,i.e.,once an element is deleted, we cannot insert another element in its position. This disadvantage of a linear queue is overcome by a circular queue, thus saving memory.

What are the disadvantages of circular queue?

I would say the biggest disadvantage to a circular queue is you can only store queue. length elements. If you are using it as a buffer, you are limiting your history depth. Another smaller disadvantage is it’s hard to tell an empty queue from a full queue without retaining additional information.

What is the benefit of circular queue?

Advantages. Circular Queues offer a quick and clean way to store FIFO data with a maximum size. Conserves memory as we only store up to our capacity (opposed to a queue which could continue to grow if input outpaces output.)

What are the advantages and disadvantages of circular queue?

Answer Expert Verified

• It takes up less memory than the linear queue.
• A new item can be inserted in the location from where a previous item is deleted.
• Infinite number of elements can be added continuously but deletion must be used.

Why do we need circular queue?

Circular queue connects the two ends through a pointer where the very first element comes after the last element. It also keeps track of the front and rear by implementing some extra logic so that it could trace the elements that are to be inserted and deleted.

How circular queue is better than a linear queue?

A circular queue is better than a linear one because the number of elements the queue can store is equal to that of the size of the array. This is not possible in a linear queue, where no more insertion can be done after the rear pointer reaches the end of the array.

What is the difference between linear and circular queue?

The main difference between linear queue and circular queue is that a linear queue arranges data in sequential order, one after the other, while a circular queue arranges data similar to a circle by connecting the last element back to the first element.

What is the difference between simple queue and circular queue?

A simple queue has a front end and a back end. Elements are inserted through the rear end of the queue and eliminated or removed through the front end. A circular queue, as the name implies, is like a circle and has no front end and back end. In this case, the last node, the elements are inserted in a circular pattern.

What is a priority queue write its applications?

The priority queue (also known as the fringe) is used to keep track of unexplored routes, the one for which a lower bound on the total path length is smallest is given highest priority. Heap Sort : Heap sort is typically implemented using Heap which is an implementation of Priority Queue.

Is heap a priority queue?

The heap is one maximally efficient implementation of an abstract data type called a priority queue, and in fact, priority queues are often referred to as “heaps”, regardless of how they may be implemented. In a heap, the highest (or lowest) priority element is always stored at the root.

What is the difference between a queue and a priority queue?

Queue is a list where insertion is done at one end and removal is done at the other end. Priority queue does not have any ends. In a priority queue, elements can be inserted in any order but removal of the elements is in a sorted order.

What are the types of priority queue?

There are two types of priority queue:

• Ascending order priority queue: In ascending order priority queue, a lower priority number is given as a higher priority in a priority.
• Descending order priority queue: In descending order priority queue, a higher priority number is given as a higher priority in a priority.

What is a priority queue explain with example?

In computer science, a priority queue is an abstract data type similar to a regular queue or stack data structure in which each element additionally has a “priority” associated with it. In a priority queue, an element with high priority is served before an element with low priority.

Why a priority queue is not a true queue?

A priority queue based on a priority min heap. That is, if, say, we use a queue whose elements are natural numbers, then the first element will be the smallest, and the last – the largest. This is not entirely true.

Where are priority queues used?

Priority queues are used to sort heaps. Priority queues are used in operating system for load balancing and interrupt handling. Priority queues are used in huffman codes for data compression. In traffic light, depending upon the traffic, the colors will be given priority.

Are priority queues FIFO?

The priority queue is a somewhat similar data structure to the queue. The difference lies in how the elements are being processed: A standard queue strictly follows the FIFO (First-In-Last-Out) principle. A priority queue does not follow the FIFO principle.

Is priority queue first in first out?

The simplest queueing discipline is called FIFO, for “first-in-first-out.” The most general queueing discipline is priority queueing, in which each customer is assigned a priority, and the customer with the highest priority goes first, regardless of the order of arrival. …

What is a priority queue C++?

Priority queues are a type of container adaptors, specifically designed such that its first element is always the greatest of the elements it contains, according to some strict weak ordering criterion. Elements are popped from the “back” of the specific container, which is known as the top of the priority queue.