IGCSE Computer Science Paper-1: Specimen Questions with Answers 106 - 107 of 164

Question number: 106

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Explain RISC and CISC Concepts in Computer Architecture?

Explanation

RISC stands for Reduced Instruction Set Computer.

Image of The Risc & Cisc

Image of the Risc & Cisc

i) It uses only simple commands that can be divided into several instructions. Every instruction attain very small jobs.

ii) The instruction sets are modest and simple.

iii) Most of the commands in case of RISC are completed in one machine cycle.

CISC stands for Complex Instruction Set Computer.

i) CISC is based upon single commands which can execute multi-step operations.

ii) It has a huge number of compound instructions that takes longer time for performance.

iii) The instruction pipelining is not easily implemented.

Question number: 107

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What is CSS Box Model also list the important components of it?

Explanation

The Box Model in CSS means design and layout. The CSS Box Model wraps around every HTML element. It consists of margins, borders, padding, and the actual content.

Image of The Css Box Model

Image of the Css Box Model

i) The Model is basically used for creating the design and layout of web pages.

ii) The different parts or components are Content-contents of the box where text and images appear, Padding-Responsible for clearing area around the content and is transparent, Border-it goes around the padding and content, Margin-responsible for clearing an area outside the border. The margin is also transparent.

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