QCM : Introduction to Computers and Their Applications — 9 questions

Questions et réponses du QCM

1. What best defines a computer?

A portable device that mainly displays touch-based apps
An electronic device that processes data using programmed instructions
A communication tool used only for sending messages
A machine that stores paper records for office use

An electronic device that processes data using programmed instructions

Explication

A computer is defined as an electronic device that processes data using programmed instructions. The other options describe specific devices or limited uses, not the general definition.

2. What is a computer?

A device used solely for communication
A machine that only performs calculations
An electronic device that processes data using programmed instructions
A device that only stores data

An electronic device that processes data using programmed instructions

Explication

A computer is defined as an electronic device that processes data using programmed instructions, enabling it to perform various tasks. The other options are incorrect because they either limit the computer's functions or describe only specific aspects.

3. Which sequence describes the basic computer cycle correctly?

Input, output, process, store
Input, process, store, output
Process, output, input, store
Store, input, output, process

Input, process, store, output

Explication

The basic cycle is input → process → store → output. This matches the core way a computer handles data and results.

4. What is the primary function of a computer as defined in the course outline?

To process data using programmed instructions
To store data only
To display images and videos
To connect to the internet

To process data using programmed instructions

Explication

A computer is defined as an electronic device that processes data using programmed instructions, which is its primary function. The other options are functions or features but not the core definition.

5. Which type of computer is described as a portable device that combines a screen, keyboard, and battery in one unit?

Laptop/Notebook
Mainframe
Tablet
Server

Laptop/Notebook

Explication

A laptop or notebook is a portable computer with a screen, keyboard, and battery built into one device. A tablet is touch-screen based and does not center on a keyboard in the same way.

6. What is the main purpose of a computer as an electronic device?

To store data permanently without processing
To serve as a communication tool only
To generate electricity for other devices
To process data using programmed instructions

To process data using programmed instructions

Explication

The primary purpose of a computer is to process data using programmed instructions, transforming input into output efficiently and accurately.

7. Which computer type is used by organizations to process huge amounts of data?

Mainframe
Personal computer
Smartphone
Embedded computer

Mainframe

Explication

A mainframe is a very large computer used by organizations for massive data processing. The other options are meant for personal use or are built into other devices.

8. When did the concept of computers as electronic devices that process data using programmed instructions become widely recognized in technological history?

In the early 20th century with the development of the first electronic computers
During the 1960s with the advent of personal computers
In the 2000s with the proliferation of internet-connected devices
In the 1980s with the rise of personal computing

In the early 20th century with the development of the first electronic computers

Explication

The recognition of computers as electronic devices that process data using programmed instructions became prominent in the early 20th century, notably with the development of the first electronic computers during that period.

9. How do the disadvantages of computers related to security and privacy differ from their environmental impacts?

Security and privacy issues are technical problems, whereas environmental impacts are social issues.
Security and privacy risks are only relevant to personal computers, while environmental impacts only concern large data centers.
Security and privacy risks are about physical damage to devices, while environmental impacts are about software vulnerabilities.
Security and privacy risks involve data theft and hacking, while environmental impacts concern electricity use and electronic waste.

Security and privacy risks involve data theft and hacking, while environmental impacts concern electricity use and electronic waste.

Explication

Security and privacy disadvantages involve risks like hacking and data theft, whereas environmental impacts relate to electricity consumption and electronic waste produced by computers.

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Computer — definition?

An electronic device that processes data using programmed instructions.

Computer definition

An electronic device processing data with instructions.

Computer types — examples?

Personal computers, laptops, tablets, servers, mainframes, supercomputers, embedded computers.

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