What is a simple queue?
a) A queue with no specific characteristics
b) A queue that allows elements to be added at both ends
c) A queue that follows FIFO principle
d) A queue that follows LIFO principle
Answer: c) A queue that follows FIFO (First In, First Out) principle
Which of the following operations is NOT supported by a simple queue?
a) Enqueue
b) Dequeue
c) Peek
d) Rearrange
Answer: d) Rearrange
What is a circular queue?
a) A queue that allows circular access to elements
b) A queue where elements can be accessed randomly
c) A queue that follows LIFO principle
d) A queue that allows resizing dynamically
Answer: a) A queue that allows circular access to elements
What advantage does a circular queue offer over a simple queue?
a) It allows elements to be rearranged
b) It reduces memory usage
c) It prevents overflow errors
d) It supports priority-based operations
Answer: c) It prevents overflow errors
In a circular queue, how is the front of the queue updated after a dequeue operation?
a) It remains fixed
b) It moves to the next element
c) It moves to the previous element
d) It depends on the element dequeued
Answer: b) It moves to the next element
Which of the following operations is efficient in a circular queue compared to a simple queue?
a) Enqueue
b) Dequeue
c) Peek
d) Rearrange
Answer: a) Enqueue
What is a priority queue?
a) A queue where elements are arranged based on their position
b) A queue that allows elements to be added at both ends
c) A queue where elements are arranged based on their priority
d) A queue that allows resizing dynamically
Answer: c) A queue where elements are arranged based on their priority
In a priority queue, which element is dequeued first?
a) The element with the highest priority
b) The element with the lowest priority
c) The first element added
d) The last element added
Answer: a) The element with the highest priority
Which of the following data structures is commonly used to implement a priority queue?
a) Stack
b) Array
c) Linked list
d) Heap
Answer: d) Heap
What is a deque (double-ended queue)?
a) A queue with two front ends
b) A queue with two rear ends
c) A queue that allows elements to be added and removed from both ends
d) A queue that allows elements to be accessed randomly
Answer: c) A queue that allows elements to be added and removed from both ends
Which of the following operations is NOT typically supported by a deque?
a) Enqueue
b) Dequeue
c) Peek
d) Rearrange
Answer: d) Rearrange
In a deque, which operation allows adding an element to the front of the queue?
a) Frontenqueue
b) Dequeuefront
c) Enqueuefront
d) Pushfront
Answer: c) Enqueuefront
Which type of queue is suitable for applications where elements are added based on their urgency or importance?
a) Simple queue
b) Circular queue
c) Priority queue
d) Deque
Answer: c) Priority queue
What is the main drawback of a simple queue compared to other types of queues?
a) Limited capacity
b) Slower insertion operation
c) Inability to handle priority-based operations
d) Inefficient memory usage
Answer: c) Inability to handle priority-based operations
Which type of queue is most appropriate for implementing a round-robin scheduling algorithm?
a) Simple queue
b) Circular queue
c) Priority queue
d) Deque
Answer: b) Circular queue
In which scenario would a deque be more advantageous than other types of queues?
a) When elements need to be added and removed from both ends
b) When elements are accessed in a random order
c) When elements are added based on their priority
d) When elements are added only at the rear
Answer: a) When elements need to be added and removed from both ends
Which type of queue is typically used in printer spooling systems to manage print jobs?
a) Simple queue
b) Circular queue
c) Priority queue
d) Deque
Answer: c) Priority queue
What is the time complexity of the enqueue operation in a priority queue with a binary heap implementation?
a) O(1)
b) O(log n)
c) O(n)
d) O(n log n)
Answer: b) O(log n)
In which type of queue does the size remain fixed after initialization?
a) Simple queue
b) Circular queue
c) Priority queue
d) Deque
Answer: a) Simple queue
Which type of queue efficiently supports applications where elements are added and removed alternately from both ends?
a) Simple queue
b) Circular queue
c) Priority queue
d) Deque
Answer: d) Deque
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