IGCSE ICT CH 6

What does a sensor use to translate analog information

• analog dual converter

• analog digital converter

• analog decimal catalyst

• analog digital catalys

Sensor can measure

• temperature

• Ph levels

• Pressure

• light

• all of the above

What is the advantage of Paper Based?

• Printing costs

• These communication would mainly be

  distributed by hand.

• Not necessary to have a computer or

  internet connection.

• Restricted to a smaller target audience

Types of communication of computer based. (Choose all the correct answers.)

• Websites

• Leaflet

• Text messages

• Multimedia Presentation

Data handling applications are _________.

• Brochure

• School Records

• Libraries

• Classroom

Choose the CORRECT statements for example of weather station.

• Hygrometer for measuring humidity.

• Barometer for measuring atmospheric pressure.

• Wind vane for measuring wind speed.

• Anemometer for measuring wind direction.

Sensors are placed to measure physical variables. The data from sensors are measured in analogue. The analogue signal is then changed to a digital signal using a ___________.

• conveyer

• actuator

• converter

• changer

As a result of the processing, the computer can send a signal to the ______ devices called actuators which could change physical conditions.

• input

• process

• output

• internal

What are the disadvantages of computer-based communication?

• Can include interactive elements such as sound, video, animation and hyperlinks.

• Can be available on different platforms

• Websites can be hacked and information may be altered.

• Setting up website and maintaining would be expensive.

Disadvantages of Data Handling Applications for Storing Data.

• Data can be updated, organised, sorted and searched in different ways.

• Data can displayed or printed in different formats.

• Data can be backed up or moved using storage media.

• Huge storage space is required.