[2 Mark Questions]

Question 12 Marks

Now-a-days many OS are available, name one Indian OS available free throughout India.

Answer

BOSS is an Indian OS. It is developed by C-DAC derived from Debian for enhancing the use of Free/Open source software throughout India.

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Question 22 Marks

The operating system of computers has progressed from a command-driven system to a Graphical User Interface (GUI). Give the reason behind this.

Answer

A GUI allows more information to be communicated to the user through the icons, pictures etc. Icons can make it easier for a user to know what a computer is going to do after providing a command or instruction.

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Question 32 Marks

The job of an operating system is to maintain a balance between the CPU and I/O devices in the sense that it has to keep the CPU busy. How is it achieved?

Answer

it is achieved through overlapped processing.

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Question 42 Marks

Some features of a specific operating system are given below:

Free/Open source
Virus free
Stable, long running operating system
Multiple work spaces

(i) Which operating system supports these features?
(ii) What is the meaning of multiple workspace?

Answer

(i) Linux (ii) With Linux, you get four desktop screens known as workspace.

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Question 52 Marks

Suchi has recently installed a new operating system on her computer.

Describe the main functions of an operating system.
What does command-driven user interface mean?

Answer

Monitors the performance of the system, enables software to communicate with hardware, enables applications, software to be loaded; gives prompts and error reports to the users.
Command-driven user interface means CUI, by which a user gives instructions via typing command onto the computer.

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Question 62 Marks

Differentiate between CUI and GUI.

Answer

Differences between CUI and GUI are as follows:

CUI	GUI
CUI stands for Character User Interface.	GUI stands for Graphical User Interface.
In CUI, user interacts with applications by making use of commands.	In GUI, user interacts with applications by making use of graphics.
Only one task can run at a time.	More than one task can run simultaneously.
A CUI will require less computer resources.	A GUI will require a lot of more system resources because each element that needs to be loaded such as icons, fonts etc.
e.g. MS-DOS.	e.g. Windows.

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Question 72 Marks

Kernel is the central module of operating system. Explain.

Answer

Kernel is like heart of operating system which plays a vital role in modern OS. Kernel is a program that manages I/O requests and translate them into data processing instructions for CPU and other components. It is a part of the OS that loads first and it remains in the main memory.

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Question 82 Marks

What do you mean by Linux?

Answer

Linux is an open source operating system, means anyone can download it and use it without any fees. It is similar to Unix in its working and difficult to understand. It is an OS that controls your computer system.

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Question 92 Marks

Which OS operates on Smartphones and explain any one type of OS?

Answer

Mobile OS is the type of OS, that operates on Smartphones, Tablets, PDAs or other Digital Mobile devices. Several types of mobile operating systems are available in market as follows:
Android, BlackBerry, iOS, Windows etc.
Android is a Mobile OS which is based on Linux kernel and primarily designed for touch screen mobile devices.
It provides access to a wide range of useful libraries and tools that can be used to build rich applications. The latest version of Android operating system is Marshmallow 6.0.

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Question 102 Marks

Differentiate between hard and soft real-time operating systems.

Answer

Difference between hard and soft real-time OS are as follows:

Hard Real-Time OS	Soft Real-Time OS
A hard real-time system guarantees that critical tasks complete on time.	A soft real-time system where a critical real-time task gets priority over other tasks and retains that priority until it completes.
This goal requires that all delays in the system be bounded from the retrieval of the stored data to the time that it takes the operating system to finish any request made of it.	As in hard real-time systems kernel delays need to be bounded.
Its tasks are periodic that receive, process and send messages.	Usually, they are periodic tasks scheduled in background, during the idle time of the processor.

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Question 112 Marks

State any two functions of operating system,.

Answer

Device management
In a computer system, there is a tremendous speed mismatch between the CPU and the I/O devices. The job of an operating system is to maintain a balance between the CPU and I/O devices. Apart from this, it has to maintain a balance between various I/O devices and has to keep the CPU busy in various processing.
Processor Management
A process or a job is an application program in running state. Processor management is the important part of an OS, which enables the activities of planning, monitoring and performing a process. During execution, a process needs certain resources such as CPU time, memory space, files and I/O devices.

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Information Technology [2 Mark Questions]

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