Operating system

Question 1

What are the tasks carried out by a typical Operating System?

Answer 1

Controls
Supervises
Deals with errors
Maintains security
Maintains a computer log
Allows communication

Question 2

What are the 4 different types of user interfaces?

Answer 2

CLI
GUI
Dialogue-based user interface
Gesture-based user interface

Question 3

What is a CLI?

Answer 3

A CLI is a text-based user interface used to run programs, manage computer files and interact with the computer.

Question 4

What is a GUI?

Answer 4

A GUI is a computer program that enables a person to communicate to a computer through the use of symbols, visual metaphors and pointing devices.

Question 5

Who uses CLI?

Answer 5

Somebody who needs to have a direct communication with a computer to develop new software, initiate memory dumps, locate errors and remove them.
Example - Programmer/ Analyst/ Technician

Question 6

Who uses GUI?

Answer 6

The end-user who does not have to have any great knowledge of how the computer works.

Question 7

What are the pros and cons of CLI?

Answer 7

Pros- The user is in direct communication with the computer, is not restricted and can alter computer configuration settings.

Cons- User needs to learn a number of commands to carry out a basic task. All commands need to be typed in using correct format, spelling and so on.

Question 8

What are the pros and cons of GUI?

Answer 8

It is more user-friendly and the user does not need to learn any commands.

Question 9

What are dialogue-based user interfaces?

Answer 9

Dialogue-based user interfaces use the human voices to give commands to a computer system.

Question 10

What are gesture-based interfaces?

Answer 10

Gesture-based interfaces rely on human interaction , which is of a more natural fashion then using mechanical devices. It is also called computer vision or image processing.

Question 11

What are the pros and cons of gesture based interfaces?

Answer 11

Pros- It replaces mechanical input devices, no physical contact is required. It has a very natural interface for human operator and no training is needed to interface with the computer.

Cons- Unintentional movement can be picked up and it only accepts a limited number of movements.

Question 12

What are the pros and cons of dialgue-based interfaces?

Answer 12

Pros- It is very useful for people who have disabilities and can be used as a security feature.

Cons- User needs to know which commands can be used, can be quite complex to set up and is unreliable.