Explanation

Explanation

A compiler is system software that translates the entire high-level language source code into machine-level object code at once.

It checks for errors during translation and produces a separate executable file.

Explanation

.py Used for writing Python programs. 

Python was created by Guido van Rossum in 1991.

More Details

.cpp extension of C++, 

.java extension of Java, 

.html extension of Web, 

.docx extension of Word

Explanation

Enter key is used to start a new paragraph in MS Word

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• Most repeated questions about shortcut key
• Goes to the beginning of the current line = Home
• 
  
• Goes to beginning of document = Ctrl + Home
• 
  
• Goes to end of current line = End
• 
  
• Goes to end of document = Ctrl + End
• 
  
• Highlights from the current position to the beginning of line = Shift + Home
• 
  
• Highlights from current position to end of line = Shift + End
• 
  
• Cut selected item = Shift + Del & Ctrl + X
• 
  
• Copy selected item = Ctrl + C
  
• 
  
• Paste selected item = Ctrl + V

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

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

Firefox and Google Chrome are popular web browsers used to access the internet.

They allow users to view and interact with web pages.

Mozilla Firefox, or simply Firefox, is a free and open-source web browser

Initial release  September 23, 2002.

In 2017, Firefox began incorporating new technology under the code name Quantum to promote parallelism and a more intuitive user interface.

Explanation

Oracle is not a function of an operating system.

It is a database management system.

Whereas Linux, DOS, and Windows are examples of operating systems that manage hardware and software resources in a computer system.