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# Queue Questions

Home > Technical Aptitude > Data Structures > Queue > General Questions
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Choose the correct option.

How is Data in a queue accessed

AFirst in First out

BFirst in last out

CLast in First out

DNone of these

Answer: Option A

Explanation:

Here is no explanation for this answer

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Choose the correct option.

Item in priority queue can jump to the front on the line if they have priority

ATRUE

BFALSE

CNone of these

Answer: Option A

Explanation:

A priority queue is similar to a simple queue in that items are organized in a line and processed sequentially. However, items on a priority queue can jump to the front of the line if they have priority. Priority is a value that is associated with each item placed in the queue.

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Choose the correct option.

The dequeue process removes data from the front of the single ended queue

ATRUE

BFALSE

CNone of these

Answer: Option A

Explanation:

Data inserted first, will leave the queue first i.e. FIFO(First-in-First-Out). The process to add an element into queue is called Enqueue and the process of removal of an element from queue is called "Dequeue".

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Choose the correct option.

Time taken for addition of element in queue is

AO(1)

BO(n)

CO(log n)

DNone of these options

Answer: Option A

Explanation:

I think this answer should be A. O(1). because this question is asked about the normal queue.

For priority queue this should be O(log n).

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Choose the correct option.

A linear list of elements in which deletion can be done from one end (front) and insertion can take place only at the other end (rear) is known as a

Aqueue.

Bstack.

Ctree.

Dlinked list.

Answer: Option A

Explanation:

In a queue, one end is always used to insert data (enqueue) and the other is used to delete data (dequeue), because queue is open at both its ends.

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Choose the correct option.

The data structure required for Breadth First Traversal on a graph is

Aqueue

Bstack

Carray

Dtree

Answer: Option A

Explanation:

queue is not a graph type, is a linear type, but how can it answer

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Choose the correct option.

Let the following circular queue can accommodate maximum six elements with the following data
front = 2 rear = 4
queue = _______; L, M, N, ___, ___
What will happen after ADD O operation takes place?

Afront = 2 rear = 5 queue = ______; L, M, N, O, ___

Bfront = 3 rear = 5 queue = L, M, N, O, ___

Cfront = 3 rear = 4 queue = ______; L, M, N, O, ___

Dfront = 2 rear = 4 queue = L, M, N, O, ___

Answer: Option A

Explanation:

Because Queue is FIFO so when we add 0 its obvious that it will come after N at position 5.

2. L

3.M

4.N

and when add o in this Queue as its FIFO it comes at position 5

5.O

6.

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Choose the correct option.

A queue is a,

AFIFO (First In First Out) list.

BLIFO (Last In First Out) list.

COrdered array.

DLinear tree.

Answer: Option A

Explanation:

queue is a container of objects (a linear collection) that are inserted and removed according to the first-in first-out (FIFO) manner.

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Choose the correct option.

6, 8, 4, 3, and 1 are inserted into a data structure in that order. An item is deleted using only a basic data structure operation. If the deleted item is a 1, the data structure cannot be a ?

AQueue

BTree

CStack

DHash Table

Answer: Option A

Explanation:

option C is correct. 1 is added at the last and deleted the first.following the concept of lifo stack is the answer

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Choose the correct option.

We need to implement a queue using a circular array. If DATA is a circular array of CAPACITY elements, and rear is an index into that array, what will be the index for the element after rear?

A(rear + 1) % CAPACITY

Brear + (1 % CAPACITY)

Crear % (1 + CAPACITY)

D(rear % 1) + CAPACITY

Answer: Option D

Explanation:

option A should be correct, modulus of a will always be zero in case of integer value.

Workspace

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