Data Representation Quizzes: Test Your Understanding

Question 1

Convert the decimal number 255 to binary.

Accepted Answer

11111111

Answer

10000001

Answer

01111111

Answer

11111000

Question 2

What is the data type of a variable that can store whole numbers, both positive and negative, without a decimal point?

Accepted Answer

Integer

Answer

Float

Answer

String

Answer

Boolean

Question 3

What is the most efficient way to store a large number of key-value pairs that need to be accessed quickly?

Accepted Answer

Hash Table

Answer

Array

Answer

Linked List

Answer

Binary Search Tree

Question 4

Which data structure is most suitable for implementing a last-in-first-out (LIFO) behavior?

Accepted Answer

Stack

Answer

Array

Answer

Linked List

Answer

Binary Tree

Question 5

What is the key difference between a stack and a queue?

Accepted Answer

Stacks follow a last-in-first-out (LIFO) order, while queues follow a first-in-first-out (FIFO) order.

Answer

Queues follow a last-in-first-out (LIFO) order, while stacks follow a first-in-first-out (FIFO) order.

Answer

Stacks and queues both follow a last-in-first-out (LIFO) order.

Answer

Stacks and queues both follow a first-in-first-out (FIFO) order.

Question 6

Which of the following is an advantage of using a linked list over an array?

Accepted Answer

Linked lists can be resized dynamically without the need to reallocate memory.

Answer

Linked lists use less memory compared to arrays.

Answer

Linked lists are faster to search compared to arrays.

Answer

Linked lists are more secure than arrays.

Question 7

What is the time complexity of searching for an element in a linked list of size n?

Accepted Answer

O(n)

Answer

O(1)

Answer

O(log n)

Answer

O(n^2)

Question 8

Which of the following is an invalid ASCII character?

Accepted Answer

€

Answer

!

Answer

$

Answer

Question 9

What is the data type of a variable capable of storing the value 'Hello, world!'?

Accepted Answer

String

Answer

Integer

Answer

Boolean

Answer

Float

Question 10

Which of the following is not a valid hexadecimal digit?

Accepted Answer

J

Answer

0

Answer

9

Answer

A

Question 11

What is the data type of a variable that can hold a range of decimal values?

Accepted Answer

Float

Answer

Integer

Answer

String

Answer

Boolean

Question 12

Which data structure is used to store a collection of elements that can be accessed using an index?

Accepted Answer

Array

Answer

Stack

Answer

Queue

Answer

Linked List

Question 13

Which data type is best suited to store a student's name?

Accepted Answer

String

Answer

Integer

Answer

Float

Answer

Boolean

Question 14

Convert the hexadecimal value FF to its decimal equivalent.

Accepted Answer

255

Answer

15

Answer

240

Answer

127

Question 15

Which data structure is designed to store a collection of distinct elements?

Accepted Answer

Set

Answer

Array

Answer

List

Answer

Queue

Question 16

What is the primary distinction between big-endian and little-endian byte orders?

Accepted Answer

Arrangement of bytes within a word

Answer

Arrangement of bits within a byte

Answer

Size of a word

Answer

Encoding type

Question 17

Which advantage is associated with variable-length encoding?

Accepted Answer

Reduced storage space

Answer

Faster processing

Answer

Increased data accuracy

Answer

Improved security

Question 18

What is the primary purpose of a hash function?

Accepted Answer

Generating unique identifiers for data

Answer

Securely encrypting data

Answer

Efficiently compressing data

Answer

Sorting data in ascending order

Question 19

Which of the following is a potential drawback of lossy data compression?

Accepted Answer

Loss of data quality

Answer

Increased processing time

Answer

Reduced storage efficiency

Answer

Security vulnerabilities

Question 20

What is the fundamental difference between static and dynamic data structures?

Accepted Answer

Static structures have a fixed size, while dynamic structures can grow or shrink.

Answer

Dynamic structures are more efficient than static structures.

Answer

Static structures are easier to implement than dynamic structures.

Answer

There is no difference between static and dynamic data structures.

Question 21

Which of the following data types is used to store a whole number without a decimal point?

Accepted Answer

Integer

Answer

String

Answer

Float

Answer

Double

Question 22

What is the purpose of a stack data structure?

Accepted Answer

To implement a 'last in, first out' (LIFO) data access method.

Answer

To store data in a hierarchical manner.

Answer

To access data in a random order.

Question 23

What is the difference between a byte and a bit?

Accepted Answer

A byte is a collection of 8 bits.

Answer

There is no difference between a byte and a bit.

Answer

A byte is larger than a bit in terms of data storage capacity.

Answer

A bit is a collection of 8 bytes.

Question 24

What is the primary purpose of data compression algorithms?

Accepted Answer

To reduce the size of data while preserving its integrity.

Answer

To encrypt data for security purposes.

Answer

To increase the size of data for better storage efficiency.