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Question-1

Define an operating system.

Solution:
It is a program which acts as an interface between the user and the computer hardware.

Question-2

Write the functions of a mouse.

Solution:
The various functions of a mouse are click, double click, right click, and drag and drop.

Question-3

Define desktop.

Solution:
The word desktop came from the word real-life desk top where a manager puts all the things required by him. It contains the screen upon which icons, windows etc., are displayed.

Question-4

Explain icons and its types.

Solution:
Icons are graphic symbol representing a window element. There are many types of icons available. They are application icons, shortcut icons, document icons and disk drive icons.

Question-5

Write notes on directory.

Solution:
Storage locations that store files or group of files under them are known as directories.

Question-6

What is the need for wild cards?

Solution:
Two special characters, ‘?’ and ‘*’ are called wildcards in windows. They are useful for searching files because they give flexibility in specifying paths and files.

Question-7

Write the steps to open a word application.

Solution:
The steps involved in opening a word application are as follows:

Start ###ERROR###à all programs ###ERROR###à Microsoft office ###ERROR###à MS word and click. A new window will open for writing.

Question-8

What happens if the system is terminated abnormally?

Solution:
If the system is not terminated properly the unsaved information will be deleted. No restore is possible.

Question-9

Explain the types of software.

Solution:
Software are of two types. They are application software and system software
System Software

It is the one which controls the computer hardware to perform its work

The instruction to the hardware is given through the software

It is also the collection of

Operating systems

Device drives

Servers

Windows system and

Utilities

The purpose of system software includes accessing of communications, printer, reader, keyboard etc.

 

Application Software

It enables the end user to perform some specific tasks.

It involves

Business applications

Compute games

Data base

Online shopping

Education software

Financial management

Question-10

List the elements of application window.

Solution:
The elements of application window are the menu bar, scroll bar, corners, borders, document window and work space.

Question-11

Write any two differences between pre-emptive and non –preemptive process.

Solution:

Pre-emptive process

Non–preemptive process

In this process, a scheduled job always completes before another scheduling decision is made. In this, the decision is made only when the first job is completed.
Types are

1. first come first serve scheduling

2. shortest job first scheduling

3. deadline scheduling

Types are

1. round robin scheduling

2. response ratio scheduling

Question-12

Explain physical IOCS and IO organization in detail.

Solution:
IO channel which makes CPU free for the duration of an I/O operation. One or more input or output devices are connected to an I/O channel. An I/O channel provides a data path between the main storage and an I/O device, and monitors the entire execution of I/O operation. Each channels and its control units and devices on them in the system are given unique codes recognized by the hardware. Steps in the execution of an I/O operation are device deletion, i/O initiation, instruction execution and termination.

Question-13

What is multiprogramming?

Solution:
If more than one task is performed at the same time, it is called Multiprogramming.

Question-14

Write notes on Job scheduling.

Solution:
Job scheduling not only assign priority to jobs but also admits new jobs for processing at appropriate times.

Question-15

List the factors of scheduling.

Solution:
CPU utilization
 

Turnaround time

Waiting time

Response time

Throughput.

Question-16

Write the formula for calculation throughput.

Solution:
Through put = the number of jobs completed / total time to complete the jobs.

Question-17

What is a peripheral?

Solution:
They are the devices that surround the system unit.

Question-18

List any 2 application of computer.

Solution:
Air ticket booking, online shopping.

Question-19

Name the first device for computing.

Solution:
Abacus

Question-20

What is the relation between microprocessor and microcomputer?

Solution:
Micro computer is a computer contains a microprocessor.




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