IGCSE Computer Science Paper-1: Specimen Questions with Answers 6 - 8 of 164

Question number: 6

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What is a CIA Triad?

Explanation

Image of the CIA Triad

Image of the CIA Triad

CIA stands for Confidentiality, Integrity and Availability.

i) The triad has been designed to guide policies for Information Security.

ii) It is one of the most popular models used by organizations.

iii) Confidentiality means the accessibility and readability of information only to the authorized person.

iv) Integrity means that data is not corrupted or modified by unauthorized personnel.

v) Availability means the data should be available to the user whenever the user requires it. Maintaining of Hardware, upgrading regularly, Data Backups and Recovery should be properly taken care of

Question number: 7

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What is the use of alias and cat command in Linux?

Explanation

Using the alias command we can use our own name to a command or a sequence of commands. On typing the short name, the shell will execute the command or sequence of commands.

Cat command is used to list the contents of a file in an editor and there is no chance of altering the file.

Question number: 8

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Explain the two main types of a Computer Software.

Explanation

Image of The Computer Software

Image of the Computer Software

The two main types of a Computer Software are the System Software and the Application Software.

i) The Computer’s hardware and application programs are operated by System software.

ii) System Software acts as the interface between the hardware and the user applications.

iii) Operating system like macOS, Ubuntu, Microsoft Windows, game engines, BIOS, Device Driver, System servers, Assembler are some of the examples of a System Software.

iv) Application programe is defined as program or collection of programs used by end users. It is the software created for a specific purpose.

v) Spreadsheets, a media player, a web browser, a file viewer are some of the examples of an Application Software.

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