IGCSE Computer Science Paper-1: Specimen Questions with Answers 147 - 149 of 164

Question number: 147

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List two ways of recovering from a system failure.

Explanation

Using a Bootable Backup Media a system can recover from failure.

System restore can also be used for recovering a system from failure.

Question number: 148

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Explain abstract data type in Computer Science?

Explanation

Image of The Abstract data type

Image of the Abstract Data Type

Abstract Data Type is defined as the mathematical model for data types, where a data type is defined by its behavior based on the point of view of a user of the data.

i) ADT in Computer Science is used for the purpose of designing and analysis of algorithms, data structures and the software systems

ii) For example the values -2, -1,0, 1,2 are the integers in ADT, the corresponding operations of addition, subtraction, multiplication and division along with greater than, less than etc behave according to the familiar Mathematics.

iii) Abstract Data Types are purely theoretical entities.

iv) The ADT is also responsible for specifying what can be stored in the ADT and what operations can be done by the ADT.

Question number: 149

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List an item at home other than computer that contains a microprocessor.

Explanation

A Television set at home uses a microprocessor. This microprocessor in television set can be used for teleconferencing purpose. The microprocessor in Television sets also processes and implements operator supplied information so as to establish an effective control over the television receiver.

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