IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 4 - 5 of 45

Question number: 4

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Appeared in Year: 2009

Essay Question▾

Describe in Detail

A floor turtle can use the following instructions:

Table of the Instruction and meaning

Table of the Instruction and meaning

Instruction

Meaning

PENUP

Lift the pen

PENDOWN

Lower the pen

LEFT t

Turn left t degrees

RIGHT t

Turn right t degrees

FORWARD n

Move n mm forward

BACKWARD n

Move n mm backward

Image of the Instructions

Image of the Instructions

Write the set of instructions to draw this shape?

Explanation

  • PENDOWN

  • LEFT 90

  • FORWARD 20

  • RIGHT 90

  • FORWARD 60

  • RIGHT 90

  • FORWARD 120

  • RIGHT 90

  • FORWARD 60

  • RIGHT 90

  • FORWARD 70

  • LEFT 90

Question number: 5

Edit

Appeared in Year: 2009

MCQ▾

Question

Choose the correct topology names for the following images?

Image of the Topology

Image of the Topology

Choices

Choice (4)Response

a.

A-Star topology, B- Mesh topology, C- Hybrid topology

b.

A-Mesh topology, B-Hybrid topology, C- Ring topology

c.

A-Bus topology, B- Hybrid topology, C- Star topology

d.

A-Ring topology, B- Star topology, C- Mesh topology

Answer

d.

Explanation

  • The geometric representation of how the computers are connected to each other is known as topology. There are five types of topology – Mesh, Star, Bus, Ring and Hybrid.

  • Bus topology: The image shown in A represent bus topology. In bus topology there is a central cable called backbone to which all the devices are connected. Here data transmits only in one direction. And in comparison with other networks cable required is least for bus topology.

  • Star topology: The image shown in B represent Star topology. In star topology all the devise are connected to a single hub through a cable. This hub is the central node and all the other nodes are connected to this central node. Every node will have its own dedicated connection to the hub. Hub acts as a repeater for dataflow.

  • Mesh topology: The image shown in C represents mesh topology. In mesh topology each device is connected to other device through a dedicated point to point link. All the devices/nodes in the network are connected to each other. Mesh has physical channels to link n devices. In mesh topology data can be transmitted using two techniques

    • Routing

    • Flooding

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