IGCSE Information & Communication Technology Paper-1: Specimen Questions with Answers 20 - 21 of 46

Question 20

Appeared in Year: 2009

Describe in Detail


A floor turtle can use the following instructions:

Table of the Instruction and Meaning
PENUPLift the pen
PENDOWNLower the pen
LEFT tTurn left t degrees
RIGHT tTurn right t degrees
FORWARD nMove n mm forward
BACKWARD nMove n mm backward

Write the set of instructions to draw this shape?

Instructions to Draw this Shape



  • Left 90
  • Forward 20
  • Right 90
  • Forward 60
  • Right 90
  • Forward 120
  • Right 90
  • Forward 45


Forward 5

Pen Down

  • Right 90
  • Forward 50
  • Left 90

Question 21

Appeared in Year: 2009

Write in Short

Short Answer▾

Which of the following components are required for video conferencing?

Microphone and Webcam
Table of the Microphone and Webcam
MicrophoneMouseDVD ROMJoystick
Magnetic tapeLight penMagnetic ink charactersDigital camera
Optical marksTrackballFloppy diskWebcam


Microphone and webcam

The components of a video conferencing system include:

  • A network for data transfer, usually a high-speed broadband Internet connection, which uses similar technology as voice over Internet protocol (VoIP) . Local area network (LAN) and integrated services digital network (ISDN) connections are occasionally used as well.
  • Two or more video cameras or webcams that provide video input.
  • Two or more microphones either located on the individual or within the device that provide audio input.
  • A computer screen, monitor, TV or projector that can broadcast video output.
  • Headphones, laptop speakers or professional speakers that can be used for audio output.
  • Hardware or software based coding and decoding technology, called codecs, which can compress analog audio and video (AV) data into digital packets on the distributing end and then decompress the data at the endpoint.
  • Acoustic echo cancellation (AEC) software which reduces audio delays and supports real time

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