Data Structures and Algorithms 1 Quiz

-Data Structures and Algorithm l-

What is the primary characteristic of a Stack?

• First In, First Out (FIFO) behavior

• Last In, First Out (LIFO) behavior

• Random access of elements

• Priority-based access

Answer explanation

Last In, First Out (LIFO) behavior

A Stack follows the Last In, First Out (LIFO) principle, where the last element added is the first one to be removed. This behavior is similar to a stack of plates where you add and remove plates from the top.

-Data Structures and Algorithm l-

Which of the following is NOT a type of Queue?

• Linear Queue

• Circular Queue

• Priority Queue

• Linked Queue

Answer explanation

Linked Queue is indeed a type of Queue. However, the question asked for the option that is NOT a type of Queue, so Linked Queue is the correct answer.

-Data Structures and Algorithm l-

What is the significance of a Circular Queue compared to a regular Queue?

• Circular Queue has a fixed size

• Circular Queue supports dynamic resizing

• Circular Queue avoids the wastage of space in front

• Circular Queue cannot perform enqueue operations

Answer explanation

Circular Queue avoids the wastage of space in front. In a Circular Queue, when the rear pointer reaches the end, it wraps around to the front, preventing the wastage of space at the front, which can occur in a regular Queue.

-Data Structures and Algorithm l-

In a Priority Queue, elements are processed based on their:

• Random order of arrival

• Alphabetical order

• Numerical order

• Priority level

Answer explanation

Priority Queue is a data structure where elements are processed based on their priority level. Elements with higher priority are served before elements with lower priority.

-Data Structures and Algorithm l-

What is a common application of a Deque (Double-ended Queue)?

• Undo functionality in text editors

• Managing function calls in recursion

• Simulation of real-world queues

• Efficient insertion and deletion at both ends

Answer explanation

Efficient insertion and deletion at both ends

Explanation: Deque allows elements to be added or removed from both ends efficiently, making it suitable for scenarios where insertion and deletion are required at both the front and rear.

-Data Structures and Algorithm l-

What data structure is suitable for implementing a function call stack in a programming language?

• Queue

• Linked List

• Stack

• Priority Queue

Answer explanation

A stack is the appropriate data structure for implementing a function call stack in a programming language. It follows the Last In, First Out (LIFO) principle.

-Data Structures and Algorithm l-

Which operation is NOT typically performed on a Stack?

• Push

• Pop

• Peek

• Dequeue

Answer explanation

The Dequeue operation is not typically performed on a Stack. Stack operations include Push, Pop, and Peek.

-Data Structures and Algorithm l-

In a Circular Queue, what is the condition for a queue to be full?

• Front pointer is equal to Rear pointer

• Front pointer is one less than the Rear pointer

• Rear pointer is one less than the Front pointer

• Rear pointer is one less than the Front pointer, or Front pointer is one less than the Rear pointer

Answer explanation

In a Circular Queue, the condition for the queue to be full is that the Rear pointer is one less than the Front pointer, or the Front pointer is one less than the Rear pointer.

-Data Structures and Algorithm l-

What is the time complexity for enqueue and dequeue operations in a Priority Queue implemented as a binary heap?

• O(1) for both enqueue and dequeue

• O(log n) for both enqueue and dequeue

• O(n) for enqueue, O(log n) for dequeue

• O(log n) for enqueue, O(n) for dequeue

Answer explanation

In a binary heap implementation of a Priority Queue, both enqueue and dequeue operations have a time complexity of O(log n).

-Data Structures and Algorithm l-

Which type of Queue allows elements to be added or removed from both ends?

• Circular Queue

• Priority Queue

• Deque

• Linked Queue

Answer explanation

Deque, or Double-ended Queue, allows elements to be added or removed from both the front and rear ends, providing flexibility in data manipulation.