IGCSE Computer Science Paper-1: Specimen Questions with Answers 13 - 15 of 164

Question number: 13

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What is Polymorphism also list one example.

Explanation

A Polymorphism is defined as the ability of being represented in more than one form or the ability of a message to be displayed in more than one form.

For example A person can act as a father, brother and an employee at the sametime, A Shape can be triangular, rectangular and circle.

Image of The Polymorphism

Image of the Polymorphism

Question number: 14

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Differentiate between WWW and WWWW.

Explanation

WWW stands for World Wide Web whereas WWWW stands for World Wide Web Worm.

The World Wide Web is a network of online content that is formatted in HTML and accessed via HTTP whereas the World Wide Web Worm is considered to be one of the earliest search engines for the World Wide Web.

The World Wide Web was developed to make information sharing easier over the various computer systems all over the world whereas the World Wide Web Worm created a database 300,000 multimedia objects which could be obtained or searched for keywords via the WWW.

Question number: 15

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List one item used in the home other than a computer that contains a microprocessor. Also state the two different tasks performed by the microprocessor.

Explanation

Microprocessors are also used in Washing machine at home.

i) The microprocessor tells the washing machine what to do, based on the selections one makes for his/her laundry. For example wash cycle and water temperature.

ii) The moment we set the cycle and load for our washer, start button is pushed thereafter. This tells the washer that it is time to use its sensors and complete the wash and rinse process which it does by turning on and off devices that control the rest of the machine such as the motors that spin the tub and the agitator or the water pump.

iii) Sensors tell the washing machine’s microprocessor that it is time to act in a certain way are sensors that detect conditions such as water level and temperature.

iv) Actuators tell the washer that it is time to use its sensors and complete the wash and rinse process.

The figure show microprocessor

The Figure Show Microprocessor

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