icse class 8 computer chapter 1 solutions
Answers
Question 2
Windows software was first developed by the Microsoft Corporation.
Question 3
Icons are the graphical representations of the programs on the desktop.
Question 4
The bottom-most part of the desktop is called the Task Bar.
Question 5
Computer icon displays all the resources of the computer system.
Question 6
The topmost bar of a window is known as the Title Bar.
State whether the following icons are system icons or application icons and name them as well:
Question 1
Powerpoint 2010 Icon ICSE Class 8 Understanding Computer Studies
Answer
Type: Application Icon
Name: Microsoft Powerpoint
Question 2
Twitter Icon ICSE Class 8 Understanding Computer Studies
Answer
Type: Application Icon
Name: Twitter
Question 3
Twitter Icon ICSE Class 8 Understanding Computer Studies
Answer
Type: System Icon
Name: Recycle Bin
Question 4
Twitter Icon ICSE Class 8 Understanding Computer Studies
Answer
Type: Applicati
Question 1
What is an operating system? Give an example.
Answer
An operating system is an integrated set of programs that manages various resources and the overall operations of a computer system. It is designed to support the various activities of the computer system in a systematic way.
Question 2
Why do we need an operating system?
Answer
We need an operating system because it enables users' interaction with computer systems by acting as an interface between users or application programs and the computer hardware.
Question 3
Give the disadvantages of batch processing system.
Answer
Disadvantages of batch processing system are:
The system does not set any priority for the execution of the jobs.
Once the process begins, the execution of the jobs automatically takes place one after the other.
The CPU time and memory are underutilized.
It is time-consuming.
Question 4
What are the features of a single-user operating system?
Answer
A single-user operating system supports only one user at a time. It is categorised as:
Single-User, Single-Task
Single-User, Multi-tasking
Single-User, Single-Task operating system allows a single user to do one thing at a time. E.g. MS-DOS
Single-User, Multi-tasking operating system allows a single user to operate several programs at the same time.
Question 5
Define 'Recycle Bin'. What is its significance in a computer system?
Answer
Recycle Bin is a system icon in Windows. When we delete folders and files, they are not permanently deleted. Instead they are removed from their original location and stored in the Recycle Bin. This gives us an opportunity to recover files and folders that we deleted accidentally. This way, Recycle Bin plays a very important role in avoiding data loss. Its icon is represented as a trash can in Windows.
Question 6
What are the functions of an operating system? Explain.
Answer
The functions of an operating system are:
Booting the computer:
It helps in starting-up the computer system and sets it up for the user to start using it.
Loading the programs in the memory:
After the computer is booted, it loads a set of programs into the primary memory that are essential for the proper functioning of the computer system.
Managing Resources:
It coordinates between the software and hardware in the computer system.
Detecting and correcting errors:
If the supporting hardware or software does not work properly, then the operating system tries to rectify it and also guides the user to take necessary steps.
Ensuring data security:
It keeps different programs and data in such a way that they don't interfere with each other.
Question 7
What is meant by 'Real Time Processing'? Give an example.
Answer
A system in which transaction access and updating of the file is done immediately, is called Real Time Processing. An example of Real Time Processing is updating the bank account of a customer.
Question 8
Multiprogramming is also known as multi-tasking. Explain.
Answer
Multiprogramming means executing more than one program. When one program is waiting for I/O transfer, another program is executed on the CPU. In this way, the computer is able to handle multiple tasks or programs simultaneously. Hence, multiprogramming is also known as multi-