Data Representation: Understanding How Data is Stored and Processed

Question 1

Which of the following is NOT a number system used in computing?

Accepted Answer

Analogue

Answer

Binary

Answer

Decimal

Answer

Octal

Question 2

Which number system has a base of 16?

Accepted Answer

Hexadecimal

Answer

Binary

Answer

Decimal

Answer

Octal

Question 3

Identify the hexadecimal number from the following options:

Accepted Answer

F7

Answer

10101

Answer

1101

Answer

1001

Question 4

Which of these is NOT a fundamental data type that computers can directly process?

Accepted Answer

Image

Answer

Integer

Answer

Character

Answer

String

Question 5

Which of these is not a fundamental data type in computer science?

Accepted Answer

File

Answer

Integer

Answer

String

Answer

Boolean

Question 6

In computer science, which of these is a data type?

Accepted Answer

Integer

Accepted Answer

String

Accepted Answer

Boolean

Answer

Pixel

Question 7

What is the smallest unit of data that a computer can store or process?

Accepted Answer

Bit

Answer

Byte

Answer

Kilobyte

Answer

Megabyte

Question 8

Which of these is NOT a number system used to represent data in computers?

Accepted Answer

Quaternary

Answer

Binary

Answer

Decimal

Answer

Octal

Question 9

What is the smallest unit of data that a computer can store?

Accepted Answer

Bit

Answer

Byte

Answer

Nibble

Answer

Word

Question 10

Which file format is used to store audio?

Accepted Answer

MP3

Answer

JPEG

Answer

PNG

Answer

GIF

Question 11

Which of these is NOT a data type used to store information in a computer?

Accepted Answer

Program

Answer

Number

Answer

Text

Answer

True/False

Question 12

Which of the following is **not** a number system used in computing?

Accepted Answer

Analog

Answer

Binary

Answer

Octal

Answer

Decimal

Question 13

In programming, which of these is NOT a fundamental data type?

Accepted Answer

Array

Answer

Number

Answer

Text

Question 14

Which is a feature of lossy compression?

Accepted Answer

The original data is permanently altered.

Answer

The original data can be perfectly recreated.

Answer

Lossy compression makes the file larger.

Question 15

Which of these file formats is NOT commonly used to store images on a computer?

Accepted Answer

ASCII

Answer

JPEG

Answer

PNG

Question 16

Which of these is not a data type used in computing?

Accepted Answer

Image

Answer

Integer

Answer

String

Answer

Boolean

Question 17

Which of these is NOT a data compression technique?

Accepted Answer

Encryption

Answer

Lossless compression

Answer

Lossy compression

Question 18

Which data type can store both whole numbers (like 5) and decimal numbers (like 3.14)?

Accepted Answer

Real

Answer

Integer

Answer

Boolean

Question 19

How do data structures assist in organizing and manipulating data effectively within a computer system?

Accepted Answer

Data structures enable us to categorize and group related data, making it easier to locate and access the data we require.

Accepted Answer

Data structures allow us to perform complex operations on data, such as sorting, searching, and filtering, efficiently.

Answer

Data structures automate data storage and retrieval, reducing the need for manual data management.

Answer

Data structures are only beneficial for storing large amounts of data, such as databases.

Question 20

How do parity bits help detect errors during data transmission?

Accepted Answer

Parity bits ensure that the number of 1's in the data is always odd (odd parity) or even (even parity). If the number of 1's changes during transmission, the receiver can detect the error.

Answer

Parity bits are not used to check the order of the data.

Answer

Parity bits are not added to make the total number of bits divisible by 8.

Answer

Parity bits are used for both error detection and correction.

Question 21

How does file metadata help organize and find data on a computer?

Accepted Answer

It gives information about the file, like its type, size, and when it was made, making it easier to find.

Answer

It shows where the data is stored on the storage device.

Answer

It only works for certain types of files, like pictures and videos.

Answer

It can't be changed.

Question 22

Encryption involves converting data into a secret code. What ethical concern arises from using encryption?

Accepted Answer

Encryption can be misused to conceal illegal activities or avoid law enforcement, raising concerns about privacy and accountability.

Answer

Encryption should be limited to governments and law enforcement for protecting sensitive information.

Answer

Encryption guarantees data confidentiality, eliminating ethical concerns.

Question 23

How does a hierarchical file system efficiently organize data?

Accepted Answer

By using a tree-like structure with directories containing subdirectories and files

Answer

By storing files in a single directory for easy location

Answer

By assigning each file a unique identifier for quick access

Question 24

Why are error detection and correction techniques essential in data representation?

Accepted Answer

To detect and correct errors that may occur during data storage or transmission.

Answer

To convert data into a format that computers can process.

Answer

To speed up data retrieval from storage devices.

Answer

To protect sensitive data from unauthorized access.

Question 25

Which of these is not a data type?

Accepted Answer

Collection

Answer

Integer

Answer

String

Answer

Boolean

Question 26

What is the main purpose of adding comments to a program?

Accepted Answer

To explain the code to other programmers.

Answer

To make the program run faster.

Answer

To change the appearance of the code.

Answer

To prevent the code from executing.

Question 27

What will be the output of the following Python code: 
print('Hello ' + 'World!')

Accepted Answer

'Hello World'

Answer

'HelloWorld!'

Answer

Hello World!

Answer

Error

Question 28

What is the main purpose of using a loop in programming?

Accepted Answer

To repeat a set of instructions multiple times.

Answer

To make the program run faster.

Answer

To store data.

Answer

To break the program.

Question 29

Which of the following is NOT a data type in computing?

Accepted Answer

Device

Answer

Integer

Answer

String

Answer

List

Question 30

Which data structure is most suitable for storing a sequence of names?

Accepted Answer

Array

Answer

Linked List

Answer

Queue

Answer

Stack

Question 31

Explain the key difference between a variable and a constant:

Accepted Answer

Variables can be modified, while constants remain unchanged.

Answer

Constants can be modified, while variables remain unchanged.

Answer

Variables and constants are essentially the same.

Answer

There is no distinction between variables and constants.

Question 32

Which data structure allows you to easily add or take away items from both the beginning and the end?

Accepted Answer

Queue

Answer

Array

Answer

Linked List

Question 33

What is a key advantage of using a binary number system for data representation in computers?

Accepted Answer

Binary systems use fewer bits to represent the same numbers, making them more efficient.

Answer

Binary systems are easier for humans to read and understand.

Answer

Binary systems are only suitable for representing small numbers.

Question 34

What is the primary purpose of a database?

Accepted Answer

To store and manage data

Answer

To process data

Answer

To display data

Answer

To transmit data

Question 35

Which of the given options is considered a programming language?

Accepted Answer

Python

Answer

Word

Answer

Excel

Answer

PowerPoint

Question 36

Encryption is a technique used to protect data. Which of the following is NOT an advantage of using encryption?

Accepted Answer

Makes data more difficult to share and transfer

Answer

Prevents unauthorized access to data

Answer

Ensures data remains unaltered

Question 37

Which of the following is a key benefit of using binary numbers in computers?

Accepted Answer

Storing and processing data more efficiently

Answer

Representing negative numbers with ease

Answer

Converting effortlessly between binary and decimal numbers

Answer

Requiring more memory space

Question 38

How does selecting the right data format help machine learning algorithms?

Accepted Answer

Makes them more accurate and faster

Answer

Makes them more complex

Answer

Saves storage space

Question 39

Which of these is NOT a basic data type in Computing?

Accepted Answer

Date

Answer

String

Answer

Integer

Answer

Boolean

Question 40

Which of these is NOT a data type commonly used in computer systems?

Accepted Answer

Imaginary number

Answer

Number

Answer

Text

Answer

True/False

Question 41

In programming, which of the following is NOT a type of data?

Accepted Answer

Images

Answer

Numbers

Answer

Text

Answer

True / False

Question 42

What is the smallest unit of data a computer can process?

Accepted Answer

Bit

Answer

Byte

Answer

Word

Answer

Nibble

Question 43

Which of the following is NOT a data structure?

Accepted Answer

Variable

Answer

Array

Answer

List

Answer

Stack

Question 44

Which number system has a base of 16?

Accepted Answer

Hexadecimal

Answer

Binary

Answer

Decimal

Answer

Octal

Question 45

What is the purpose of a checksum?

Accepted Answer

To detect errors in data transmission

Answer

To encrypt data

Answer

To compress data

Answer

To convert data into binary format

Question 46

What is the main difference between a primary key and a foreign key in a database?

Accepted Answer

A primary key uniquely identifies a row, while a foreign key references a primary key in another table

Answer

A primary key can be used to search for data, while a foreign key cannot

Answer

A foreign key is always a numeric data type, while a primary key can be any data type

Question 47

Which of the following is a lossless compression technique?

Accepted Answer

Huffman coding

Answer

GIF

Answer

MP3

Answer

JPEG

Question 48

What is the primary purpose of encryption?

Accepted Answer

To protect data from unauthorized access or modification

Answer

To organize data

Answer

To reduce the size of data

Answer

To make data easier to transmit

Question 49

Which of the following is a type of cloud computing service?

Accepted Answer

Infrastructure as a Service (IaaS)

Answer

Hypertext Transfer Protocol (HTTP)

Answer

Virtual Private Network (VPN)

Answer

Domain Name System (DNS)

Question 50

Which of the following is not a data type commonly used in computing?

Accepted Answer

Pattern

Answer

Array

Answer

String

Answer

Boolean

Question 51

What is a primary purpose of using data representation?

Accepted Answer

To store and process data efficiently

Answer

To display data in a pleasing way

Answer

To transmit data securely

Answer

To make data more organized

Question 52

Which of the following is an advantage of using the binary number system in computers?

Accepted Answer

It is more efficient for computers to process

Answer

It is easier to read and write

Answer

It is compatible with all types of data

Answer

It is more accurate than other number systems

Question 53

How many bits make up a single byte?

Accepted Answer

8

Answer

4

Answer

16

Answer

32

Question 54

Which of the following is a lossless data compression technique?

Accepted Answer

Huffman Coding

Answer

MP3

Answer

JPEG

Answer

GIF

Question 55

What is the primary purpose of using a checksum in data transmission?

Accepted Answer

To detect errors during transmission

Answer

To encrypt data

Answer

To speed up transmission

Answer

To compress data

Question 56

Which of the following is a commonly used image file format?

Accepted Answer

JPEG

Answer

TXT

Answer

MP3

Answer

XML

Question 57

Which of the following is NOT a recognized data type in common programming languages?

Accepted Answer

Banana

Answer

Boolean

Answer

Integer

Answer

String

Question 58

Which data structure is most appropriate for storing a list of student names?

Accepted Answer

Array

Answer

Stack

Answer

Queue

Answer

Linked List

Question 59

What is the primary purpose of using a flowchart?

Accepted Answer

To visually illustrate the flow of data and decision-making logic

Answer

To permanently store data

Answer

To perform complex calculations

Answer

To create interactive simulations

Question 60

Which of the following is an advantage of using flowcharts?

Accepted Answer

Improved communication and clarity in understanding complex processes

Answer

Reduced memory usage

Answer

Faster program execution

Answer

Increased code complexity

Question 61

How do algorithms and flowcharts differ?

Accepted Answer

An algorithm is a set of step-by-step instructions, while a flowchart is a visual representation of the algorithm's logic

Answer

A flowchart is more detailed than an algorithm

Answer

An algorithm is more detailed than a flowchart

Question 62

What is the primary goal of data compression?

Accepted Answer

To reduce the size of a file while preserving its essential information

Answer

To enhance data security

Answer

To increase the speed of data transfer

Question 63

Which of the following is an example of lossless compression?

Accepted Answer

ZIP

Answer

MP3

Answer

JPEG

Answer

AVI

Question 64

What is the key benefit of using a database?

Accepted Answer

Efficient storage, organization, and retrieval of large amounts of data

Answer

Enhanced data security

Answer

Simplified data sharing