IGCSE Computer Science Paper-1: Specimen Questions with Answers 108 - 109 of 164

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Question 108

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Define the terms pixel and resolution

Explanation

The Pixels are abbreviated as the “px” used during graphic and web design equivalent to roughly 1 ⁄ 96 inch (0.26 mm) . Information is stored as bits in the Pixels.

A resolution is the number of pixels (individual points of color) contained on a display monitor, expressed in terms of the number of pixels on the horizontal axis and the number on the vertical axis. The sharpness of the image on a display depends on the resolution and the size of the monitor.

Question 109

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What is the meaning of an object and a class in C ++ ?

Explanation

The Object Contains Related Data and Instructions

An object contains related data and instructions.

  • The Data relates to what exactly the object represents whereas the instructions define how this object relates to other objects and itself.
  • A Class is the building block of object oriented programming. It is a user defined data type holding its own data members and member functions.
  • The private members are not accessible outside the class whereas the public members are accessible outside the class.

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