Data representation

Question 1

What is data representation?

Answer 1

Data representation is the method of expressing information in a format that can be processed by a computer.

Question 2

True or False: Binary is the only number system used by computers.

Answer 2

True

Question 3

What are the two digits used in the binary system?

Answer 3

0 and 1

Question 4

Fill in the blank: In binary, the number 2 is represented as ____.

Answer 4

10

Question 5

What is the decimal equivalent of the binary number 101?

Answer 5

5

Question 6

What is a bit?

Answer 6

A bit is the smallest unit of data in a computer, representing a single binary value (0 or 1).

Question 7

What is a byte?

Answer 7

A byte is a group of 8 bits.

Question 8

Multiple Choice: Which of the following is NOT a data type? A) Integer B) String C) Bytecode D) Float

Answer 8

C) Bytecode

Question 9

What does ASCII stand for?

Answer 9

American Standard Code for Information Interchange

Question 10

True or False: The ASCII code can represent 256 different characters.

Answer 10

False

Question 11

What is the range of values for an 8-bit unsigned integer?

Answer 11

0 to 255

Question 12

Fill in the blank: In hexadecimal, the number 15 is represented as ____.

Answer 12

F

Question 13

What is the purpose of data encoding?

Answer 13

Data encoding is used to convert data into a specific format for efficient transmission or storage.

Question 14

Multiple Choice: Which of the following is a common image file format? A) TXT B) JPEG C) MP3 D) HTML

Answer 14

B) JPEG

Question 15

What is the main advantage of using binary for data representation?

Answer 15

Binary is less prone to errors and can be easily processed by electronic devices.

Question 16

True or False: The number system used in programming is usually decimal.

Answer 16

False

Question 17

What is a character set?

Answer 17

A character set is a collection of characters that can be used in text data.

Question 18

Fill in the blank: A pixel is the smallest unit of a digital image, representing a single ____.

Answer 18

point of color

Question 19

What does the term ‘data compression’ refer to?

Answer 19

Data compression refers to the process of reducing the size of a data file.

Question 20

Multiple Choice: Which of the following is NOT a method of data compression? A) Lossy B) Lossless C) Encryption D) Run-Length Encoding

Answer 20

C) Encryption

Question 21

What is a digital signal?

Answer 21

A digital signal is a signal that represents data as a sequence of discrete values.

Question 22

True or False: A graphic representation of data is known as a chart.

Answer 22

True

Question 23

What is the purpose of a data structure?

Answer 23

A data structure is used to organize and store data efficiently for access and modification.

Question 24

Fill in the blank: A spreadsheet is an example of a ____ data representation tool.

Answer 24

table-based

Question 25

What does 'metadata' refer to?

Answer 25

Metadata refers to data that provides information about other data.

Question 26

Multiple Choice: Which of the following is a type of database? A) SQL B) HTML C) CSS D) JavaScript

Answer 26

A) SQL

Question 27

What is the significance of the term 'resolution' in data representation?

Answer 27

Resolution refers to the detail an image holds, typically measured in pixels.