Lesson 1 Operating System Class-7

Computer Science

Class-VII

Lesson 1 Operating System

A. Fill in the Blanks

[ Operating system     2          character       machine         device ]

1. Computer only understand machine  language.

2. Operating System _ acts as an interface between user and hardware.

3. Device _ management is used to manage the speed mismatch between the CPU and Input out devices.

4. There are _2 (two) _ types of user interfaces.

5. Character User Interface is also known as character _ line interface.

B. True or False

1. The full form of GUI is Graphical user Interface. True

2. Linux is an example of GUI operating System. False

3. Computer can understand machine language 4 and 5 False

4. Memory management helps to track overall status of memory allocation. True

5. CUI communicate with computer by typing commands. True

C. Short answer type questions

1. Give two examples of operating system.

Ans- Windows XP , Windows Vista, Windows 7, Windows 2000,  Ms DOS

2. Name two types of interfaces.

Ans- Character User Interface (CUI)  and  Graphical User Interface (GUI)

3. Write two examples of CUI interface.

Ans- Example of CUI is MS-DOS, LINUX

D. Long answer questions

1. Define Operating System?

Ans- Operating system acts as an interface between user and hardware (machine) to perform various task. Example- Windows XP , Windows Vista, Windows 7, Windows 2000,  Ms DOS

2. Differentiate between GUI and CUI.

Ans-

GUI	CUI
1)Graphical User Interface 2)It enables the user to communicate with computer system by using pointing devices, icons. 3)Example of GUI is Windows 7, Windows 10	1)Character User Interfacce 2)It is also known as command line interface in which you can communicate with computer through typing commands. 3)Example of CUI is MS-DOS, LINUX

3. Why we need operating system?

Ans- 1. Device management  à In a computer system there is vast speed mismatch between the CPU and Input output devices. This is the job of operating system to maintain balance between them.

2. Process Management  à  It is the duty of operating system to control all the resources like file, input/ output and CPU in fair terms.

3. Memory Management  à  Operating system keeps tracks on the overall status of memory allocation.

4. File management  à  It includes backup of files, their security and easy access to make our work faster and easier

4. What do you mean by user interface?

Ans- A user interface is medium through which a user interacts with a system. It is the one of the most important part of operating system. There are two types of user interfaces : CUI, GUI