Ncert solutions for class 9 computer chapter 1

Answer:

Question 1.

What is a computer software?

Answer:

Computer software is a collection of programs, procedure and related data that provide the instructions for telling a computer what to do and how to do it.

Question 2.

What do you mean by system software?

Answer:

System software refers to the programs that controls internal computer operations and makes best use of the hardware devices. Question 5.

Which language processor converts an HLL program into machine language at once?

Answer:

Compiler is a language processor which converts whole HLL program into machine language at once which can be understood by the processor.

Question 6.

Define a utility software.

Answer:

A utility software is a system software designed to help in the management and tuning of operating systems, computer hardwares and different application softwares.

Question 7.

Mention some examples of utility software.

Answer:

Data compression utilities, virus protection utilities and disk defragmentation utilities.

Question 8.Which software do you use to keep your system intact from computer viruses?

Answer:

Antivirus software is used to keep your system intact from computer viruses.

Question 9.

Why we cannot use a text editor as a picture editing tool?

Answer:

Text editor is a editing program which does not support the editing of graphical images because it works only on text.

Question 10.

Describe an application software.

Answer:

An application software is designed to help the user to perform specific functions.

Question 11.

Why do we use spreadsheets?

Answer:

A spreadsheet is specially used to organise data in tables and to analyse the tabulated data in desired manner. It allows you to do a lot of calculations.

Question 12.

Name the software used to control redundancy from a collection of large amount of data.

Answer:

A database is a collection of integrated data stored together with controlled redundancy to serve one or more applications in an optimal fashion.

Question 13.

Name the latest attendance recording devices used in an attendance system.

Answer:

Biometrics and Access cards.

Question 14.

What do you mean by machine language?

Answer:

Machine language is the only language that is understood by the computers. It is a collection of binary digits (0 or 1) or bits that the computer reads and interprets.