Explanation

Input devices are used to provide data and control signals to a computer.

• Examples of input devices: Keyboard, mouse, scanner, camera, joystick, and microphone.

Output devices display the results of that data. 

• Examples of output devices: Printer, Monitor, Plotter, Speaker, Headphones, Projector, GPS device, Optical mark reader, and Braille reader.

Explanation

Windows 8 is the only version of Windows that does not have a traditional Start button on the taskbar.

Instead, it has a Start screen with tiles and a charms bar.

Windows 10, Windows Vista, and previous versions of Windows all have a Start button on the taskbar.

Explanation

Computer hardware includes the physical parts of a computer,

such as the case,

central processing unit,

monitor,

mouse,

keyboard,

computer data storage,

graphics card,

sound card,

speakers and motherboard.

Explanation

In BASIC programming, CLS stands for "Clear Screen".

It is used to erase all output from the screen and start fresh.

Explanation

Freeware is software that is completely free to use without any cost, though it is usually copyrighted.

Unlike shareware, freeware doesn’t expire or require payment after trial.

Explanation

A primary key uniquely identifies each record (row) in a database table.

It ensures data integrity by preventing duplicate and null entries in the key column.

Explanation

Email, or electronic mail, is a way to send messages from one or more users to one or more recipients using the internet:

• Text, pictures, and files: You can send text, pictures, and files to one or more people.
• Notifications and reminders: You can send emails to notify or remind people.
• Marketing: Companies can use email to market their products and remind customers to make a purchase.

Explanation

In computer science, the levels of representation are typically shown from high-level to low-level as:

• High-level: Software (e.g., C++, COBOL, JAVA)
• Low-level: Hardware (e.g., machine code, assembly language)

Explanation

A bookmark identifies a location or a selection of text that you name and identify for future reference.

It allows you to mark a specific spot in a document or webpage and easily return to it later.

Explanation

A telephone line supports full-duplex transmission, meaning both parties can talk and listen simultaneously.

Unlike half-duplex (e.g., walkie-talkie).

Full-duplex allows two-way communication at the same time.