Overview of IT

The four basic operation of computer include

• Hardware

• Internet

• Input

• Programming

Answer explanation

The four basic operation of computing are input, process, storage and output

Regarding input

• Any kind of data that needs processing

• Done by Central Processing Unit (CPU)

• Also known as main memory

• Devices include keyboard and mouse

Answer explanation

Input can be any kind of data that needs processing. We input data in the computer using keyboard, mouse and other devices

Processing is done by CPU.

Primary storage also known as main memory, temporarily holds data waiting to be processed.

Devices that translate the processed information from the computer into a form that humans can understand.

(a)  

Answer explanation

Examples of output devices are monitor, speaker and printer

Regarding data representation

• Data consist of analog data and digital data

• Binary representation is used in analog data

• Example of analog data is human voice

• Byte is the smallest unit of data that computer can process

Answer explanation

1. 1. Data consist of analog data and digital data

2. 2. Analog data us e continuous signal or waves that vary in strength and frequency. Eg : human voice

3. 3. Binary representation is used in digital data (electronic state)

4. 4. Bits is the smallest unit and each bytes consist of 8 bits

Disadvantages of using computer EXCEPT

• More accurate

• Lack of human touch

• Cost-saving

• Reduction of paperwork

Answer explanation

Advantages of using computer

• - speed, accurate calculation than conventional method, Automation, cost-saving, reduce paperwork

Disadvantages of using computer

• - No intelligence (depends on instructions and input), excessive use lead to health problem and lack of human touch

The computer that we usually use is the ...

• Supercomputer

• Midrange computer

• Mainframe computer

• Microcomputer

Type of computer usually used for very complex task and calculations

(a)  

Answer explanation

Supercomputer is a high-performance computer. Used for computing very complex task such as complex scientific calculation, forecasting weather

Mainframe computer is designed for batch processing and record-keeping for processing millions of instructions. Eg: bank, insurance company

Midrange computer refer as server

Microcomputer also known as PC (personal computer)

Smartwatch is included in the types of personal computer (PC)

• True

• False

Answer explanation

5 types of PC

• - Desktop computer

• - Laptop computer

• - Tablet Computer

• - Smartphones

• - Wearable devices eg : smartwatch

RAM is a short form for

(a)  

Answer explanation

Which of the following is NOT an essential element of an information system?

• Data

• People

• Processor

• Procedures

Answer explanation

Elements of Information System

People

Procedures

Hardware

Software

Data

Internet

Mnemonic (not sure if this help) : People undergone procedure to get hardware but get software instead. To access the data, they need internet