Module 1

Question 1

What is IT?

Answer 1

The use of digital technology to store and process data into useful information.

Question 2

What is a computer?

A device that stores and processes data by performing calculations

Question 3

What is the Binary system?

Answer 3

Base 2 numeral system. A communication system used by computers

Question 4

What is a bit?

Answer 4

A binary digit. 8 binary numbers or bits grouped together is byte

Question 5

How are bytes used to represent alpha numerical characters

Answer 5

Each byte can represent a character, and with up to 256 possible byte combinations, computers can represent up to 256 different characters

Computers use ASCII binary character tables to translate bytes into letters and vice versa.

Question 6

What is character encoding

Answer 6

Computers assigns binary values to characters so that humans can read them in English

Question 7

What is ASCII?

Answer 7

A Character encoding standard that represents the English alphabet, numbers, and punctuation marks.

Uses 7 bits for encoding, meaning it can represent 128 different characters

Question 8

What is Unicode?

Answer 8

Unicode or universal character encoding is a Character encoding standard that supports many different alphabets and even emojis

Unlike ASCII, Unicode does not define how its mapping should be implemented, it only specifies which character refers to which code point.

A code point is a hexadecimal number representing a character

Question 9

Computer Architecture Layers of Abstraction

Answer 9

1. Hardware
2. Operating System
3. Software
4. Humans