Explanation

Line spacing is the vertical space between lines of text in a document.

It helping to improve readability and layout.

Explanation

Line spacing determines the amount of vertical space between lines of text in a paragraph.

By default, lines are single-spaced, meaning that the spacing accommodates the largest font in that line, plus a small amount of extra space.

Explanation

The third generation of computers (roughly 1964-1971)

It is associated with the development and widespread use of integrated circuits (ICs),

They allowed for smaller, faster, and more powerful computers.

This era also saw the emergence of online real-time systems, making them a defining characteristic of this generation. 

Explanation

Ctrl + D is used to open the Font dialog box in MS Word.

It where you can change font settings. 

Bold: Ctrl + B

Alignment:

• Ctrl + E (Center)
• Ctrl + L (Left)
• Ctrl + R (Right)

Justification: Ctrl + J

Explanation

• The operating system is also called the interface  between the user and the computer
• ..
• The Operating System is the Interface between the user and the computer.
• It is called the Interface because it converts the commands the user gives to a language that the computer can understand (machine language) and vice versa.
• Multiple operating systems are available such as Windows, Mac OS, and Linux.
• ..
• virus protection is not the function of the operating system
•  Real-time system operating system reads and reacts in actual time

Explanation

UNIX is an operating system that was originally AT&T.

UNIX development started in 1969 at the Bell Labs research center by Ken Thompson and Dennis Ritchie.

UNIX was widely used for Internet servers, workstations, and mainframe computers.

Explanation

A Realtime operating system (RTOS) is designed to respond immediately to external events.

It is used in systems like aircraft controls, medical devices, and industrial machines, where delays can be critical.

Explanation

Explanation

From Third generation operating systems were developed.

The period of third generation was from 1965-1971.

The computers of third generation used Integrated Circuits (ICs) in place of transistors.

A single IC has many transistors, resistors, and capacitors along with the associated circuitry.

The IC was invented by Jack Kilby.

Explanation

Handheld devices, such as smartphones, tablets, and personal digital assistants (PDAs), are examples of hardware.

Hardware refers to the physical components of a computer system, including devices that are held in one's hand.