Data Representation Quizzes for Year 10 Computing

Question 1

Which compression method retains all the original data, preserving quality, making it ideal for graphics and animations?

Accepted Answer

GIF

Answer

JPEG

Answer

MP3

Answer

ZIP

Question 2

Which of these is NOT a basic data type in computer science?

Accepted Answer

File

Answer

Integer

Answer

Float

Answer

Character

Question 3

What is the binary representation of the decimal number 128?

Accepted Answer

10000000

Answer

01111111

Question 4

When writing a Python script, which data type is best suited to represent average temperature readings gathered from a weather station over a week?

Accepted Answer

Float

Answer

Integer

Answer

String

Answer

Boolean

Question 5

How does binary representation play a crucial role in computer systems for data storage, processing, and communication?

Accepted Answer

Binary representation's efficiency in data storage, using only 0s and 1s, makes it essential for this purpose.

Answer

Binary representation is used only for data storage and has no role in data processing or communication.

Answer

Binary representation is used in data storage and communication but not in data processing.

Answer

Binary representation is used in data storage and processing but not in communication.

Question 6

How does the choice of data representation format affect the accuracy, precision, and efficiency of data processing operations?

Accepted Answer

An inappropriate data representation format can lead to data loss or distortion, affecting accuracy and precision.

Answer

Data representation format has no impact on accuracy or precision, only on storage requirements.

Answer

Choosing a more precise data representation format always leads to more accurate results.

Answer

Data representation format only affects the efficiency of data processing operations, not their accuracy or precision.

Question 7

Which data compression technique ensures that all data is preserved without any loss when decompressed?

Accepted Answer

PNG

Answer

JPEG

Answer

MP3

Answer

MPEG

Question 8

A website stores high-resolution images. Which data compression method is best for keeping image quality high while reducing file size?

Accepted Answer

Lossless compression: Keeps all image data, no quality loss.

Answer

Lossy compression: Removes some image data, may reduce quality.

Answer

Run-length encoding: Good for repetitive data, not images.

Answer

Huffman coding: Assigns shorter codes to common symbols, not images.

Question 9

A website stores both images and text. Which file format combination is best for saving storage space while maintaining visual quality?

Accepted Answer

JPEG images and HTML text

Answer

PNG images and JSON text

Answer

GIF images and XML text

Answer

BMP images and CSS text

Question 10

How does choosing a specific data type impact the binary representation of data?

Accepted Answer

Different data types have unique sizes and structures that determine the number of bits used for their binary representation.

Answer

The binary representation of data is unaffected by the chosen data type.

Answer

Data types only affect the text-based representation of data, not the binary representation.

Answer

Selecting a data type has no influence on how data is stored in binary form.

Question 11

When is lossless compression more suitable than lossy compression?

Accepted Answer

When preserving the original data without any loss is crucial

Answer

When compressing highly redundant data

Answer

When compressing large datasets

Answer

When achieving high compression ratios is the priority

Question 12

How does data compression enhance web application performance by considering factors like page loading speed, bandwidth consumption, and user experience?

Accepted Answer

By reducing file sizes, data compression speeds up page loading, lowers bandwidth usage, and enhances user experience.

Answer

Data compression is only advantageous for text-heavy web applications.

Answer

Data compression algorithms always increase file sizes, slowing down web application loading.

Answer

Web applications used on high-speed networks don't need data compression.

Question 13

Data compression research is constantly evolving. What are the latest breakthroughs and promising future directions in this field?

Accepted Answer

Research explores innovative approaches to handle complex data types generated by AI and machine learning.

Answer

Research focuses solely on creating new compression algorithms, neglecting efficiency improvements.

Answer

New techniques are designed primarily for text data, ignoring other data types like images and videos.

Answer

Data compression has reached its peak, with no significant advancements expected in the future.

Question 14

What is the main goal of data compression?

Accepted Answer

To speed up the transfer of data

Accepted Answer

To save money on data storage

Answer

To enhance data security

Answer

To create a backup copy of data

Question 15

Discuss the practical advantages of data compression in various situations, considering both the optimization of storage space and the enhancement of transmission speed.

Accepted Answer

Reduces storage space requirements, allowing for more data to be stored in a given space.

Accepted Answer

Accelerates data transfer by reducing its size, minimizing delays in communication.

Answer

Enhances the reliability of data transmissions, reducing the risk of errors.

Answer

Complicates data processing, making it more challenging to handle and manipulate.

Question 16

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

Accepted Answer

Duration

Answer

Integer

Answer

String

Answer

Boolean

Question 17

Which technique reduces data size without losing any information?

Accepted Answer

Compression

Answer

Encryption

Answer

Decryption

Answer

Encoding

Question 18

What is the primary purpose of a parity bit in data transmission?

Accepted Answer

To detect errors during transmission

Answer

To correct errors during transmission

Answer

To increase transmission speed

Answer

To reduce transmission bandwidth

Question 19

Which of the following is an example of lossy data compression?

Accepted Answer

JPEG

Answer

ZIP

Answer

PNG

Answer

GIF

Question 20

Which of the following is a valid hexadecimal number?

Accepted Answer

0xFF

Answer

123

Answer

ABC

Answer

1010

Question 21

What is the maximum value that can be represented using an 8-bit signed integer?

Accepted Answer

127

Answer

255

Answer

-128

Answer

-256

Question 22

Which data type can represent whole numbers without a decimal point?

Accepted Answer

Integer

Answer

Boolean

Answer

Character

Answer

Decimal

Question 23

Which file format is commonly used for storing images?

Accepted Answer

.jpg

Answer

.txt

Answer

.pdf

Answer

.mp4

Question 24

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

Accepted Answer

Concept

Answer

Integer

Answer

String

Answer

Array

Question 25

What is the binary representation of the decimal number 10?

Accepted Answer

1010

Answer

1100

Answer

1110

Answer

1011

Question 26

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

Accepted Answer

To identify errors in data

Answer

To reduce data size

Answer

To secure data from unauthorized access

Answer

To enhance data processing speed

Question 27

Which factor is irrelevant when selecting a compression technique?

Accepted Answer

Personal preferences

Answer

Compression ratio

Answer

Processing time

Answer

Data type

Question 28

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

Accepted Answer

Hexadecimal

Answer

Boolean

Answer

String

Answer

Array

Question 29

What is the purpose of a parity bit?

Accepted Answer

To detect errors in data transmission

Answer

To store additional data

Answer

To make data more compact

Answer

To encrypt data

Question 30

What is the **main** advantage of using floating-point numbers?

Accepted Answer

They can represent very large and very small numbers

Answer

They are faster to process than integers

Answer

They use less storage space than integers

Answer

They are more accurate than integers

Question 31

What is the difference between big-endian and little-endian byte ordering??

Accepted Answer

The order in which bytes are stored in memory

Answer

The number of bits in a byte

Answer

The type of data stored in a byte

Answer

The endianness of a computer's processor

Question 32

Which of the following is a type of optical storage?

Accepted Answer

Compact disc

Answer

Hard disk drive

Answer

Flash drive

Answer

Solid-state drive

Question 33

What is the primary purpose of a computer's cache memory?

Accepted Answer

To store frequently accessed data and instructions

Answer

To store the operating system

Answer

To store user programs

Answer

To store temporary files

Question 34

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

Accepted Answer

Array

Answer

Integer

Answer

Float

Answer

Character

Question 35

Which data compression technique involves some loss of data?

Accepted Answer

JPEG

Answer

Run-length encoding

Answer

Huffman coding

Answer

LZ77

Question 36

What is the primary function of a checksum?

Accepted Answer

Detect errors in data transmission

Answer

Reduce data size

Answer

Encrypt data

Answer

Convert data formats

Question 37

Which file format stores data in binary form?

Accepted Answer

BMP

Answer

TXT

Answer

CSV

Answer

XML

Question 38

What is the purpose of a parity bit?

Accepted Answer

Indicate whether the data contains an odd or even number of 1s

Answer

Indicate whether the data contains an odd or even number of 0s

Answer

Correct errors in data transmission

Answer

Compress data

Question 39

Which option is not a data compression method?

Accepted Answer

Encryption

Answer

Lossy compression

Answer

Lossless compression

Answer

Redundancy removal

Question 40

What is a hash function used for?

Accepted Answer

Generating a unique identifier for data

Answer

Compressing data

Answer

Encrypting data

Answer

Converting data formats

Question 41

What is the main purpose of a data dictionary in data representation?

Accepted Answer

To define the meaning and format of data elements

Answer

To store data in a compressed format

Answer

To ensure the integrity of data

Answer

To encrypt data

Question 42

Which of the following is not a recognized type of data redundancy?

Accepted Answer

Ideological redundancy

Answer

Functional redundancy

Answer

Physical redundancy

Answer

Logical redundancy

Question 43

What is the intended purpose of a checksum?

Accepted Answer

To detect errors in data transmission

Answer

To correct errors in data transmission

Answer

To encrypt data

Answer

To compress data

Question 44

Which of the following is a characteristic of a variable-length code?

Accepted Answer

Different symbols can have different codeword lengths

Answer

All codewords are always of the same length

Answer

Codewords are always in alphabetical order

Answer

Codewords are always in numerical order

Question 45

Which of these data compression methods results in some loss of data?

Accepted Answer

JPEG

Answer

Huffman Coding

Answer

LZW Compression

Answer

PNG

Question 46

Which of the following is not a basic data type in most programming languages?

Accepted Answer

Tuple

Answer

Integer

Answer

Boolean

Answer

String

Question 47

Convert the decimal number 13 to its binary representation:

Accepted Answer

1011

Answer

1010

Answer

1101

Answer

1110

Question 48

Which data compression technique preserves all the original data and does not introduce any loss?

Accepted Answer

Huffman coding

Answer

JPEG

Answer

MP3

Answer

GIF

Question 49

What is the main purpose of a parity bit?

Accepted Answer

To detect errors in data transmission

Answer

To indicate the number of 1s in a byte

Answer

To improve data compression ratios

Answer

To represent negative numbers

Question 50

Which of the following is a floating-point data type?

Accepted Answer

float

Answer

int

Answer

char

Answer

boolean

Question 51

What is the ASCII code for the uppercase letter 'A'?

Accepted Answer

65

Answer

97

Answer

100

Answer

110

Question 52

Identify the hexadecimal number from the following:

Accepted Answer

0x12

Answer

1011

Answer

ABC

Answer

100100

Question 53

What is the purpose of endianness?

Accepted Answer

To ensure consistent data storage and retrieval across different systems

Answer

To improve data compression ratios

Answer

To protect data from unauthorized access

Answer

To speed up data processing

Question 54

What is the primary reason for using data compression?

Accepted Answer

Reduce file size

Answer

Increase data transfer speed

Answer

Enhance data security

Answer

Improve data clarity

Question 55

Which data type is used to represent numbers without decimals?

Accepted Answer

Integer

Answer

Float

Answer

Double

Answer

String

Question 56

Which technique is primarily used to identify patterns and relationships within data?

Accepted Answer

Data mining

Answer

Data compression

Answer

Data visualization

Answer

Data encryption

Question 57

What is the term for converting continuous analog signals into digital ones?

Accepted Answer

Digitization

Answer

Quantization

Answer

Sampling

Answer

Interpolation

Question 58

What is the main advantage of lossless compression techniques?

Accepted Answer

No data loss during compression

Answer

Smaller file size

Answer

Faster decompression

Answer

Enhanced image resolution

Question 59

What is a key feature of raster graphics?

Accepted Answer

Composed of individual pixels

Answer

Can be scaled without quality loss

Answer

Defined by mathematical equations

Answer

Used exclusively for vector images

Question 60

What is the purpose of a file extension?

Accepted Answer

To indicate file type and associated software

Answer

To encrypt file contents

Answer

To reduce file size

Answer

To store file metadata

Question 61

How does Huffman coding enhance data compression efficiency?

Accepted Answer

It assigns shorter codes to more frequent symbols.

Answer

It uses fixed-length codes for all symbols.

Answer

It introduces data distortion.

Answer

It is rarely used in practice.

Question 62

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

Accepted Answer

Image

Answer

Integer

Answer

String

Answer

Boolean

Question 63

Convert the decimal number 13 to binary.

Accepted Answer

1101

Answer

1011

Answer

1111

Answer

0111

Question 64

Which of the following is an advantage of using lossless data compression?

Accepted Answer

Maintains the original data

Answer

Smaller file size

Answer

Faster decompression

Answer

Increases file security