0417 ICT

Circle two items which are internal hardware components.

• Sound card

• Processor

• Linker

• Actuator

• Keyboard

One component of the internal memory of a computer is Random Access Memory (RAM). State two characteristics of RAM.

• Volatile

• Non-volatile

• CPU doesn't have direct access

• Can be read from and written to

• Permanent storage

For each of the following uses of data capture, match one appropriate direct data entry device.

• Bar Code reader

• To scan items at a computerised till

• RFID reader

• Contactless credit cards

• Optical Mark Reader

• Multiple choice answers in an examination paper

A glasshouse is used to grow plants and is computer controlled.

Name three sensors which could be used in this glasshouse.

• Temperature

• Humidity

• Light

• Gas

• Proximity

A glasshouse is used to grow plants and is computer controlled. Below reasons why data from the sensors need to be ​ (a)   for use by a computer.

So that the ​ (b)   from the sensor can be understood by the computer.

The ​ (c)   from a sensor is analogue.

The ​ (d)   to the computer is digital.

• data
• output
• input
• converted
• compared
• process
• calculations

A smartphone has many uses, for example making and receiving telephone calls. Give three other uses of a smartphone.

• GPS

• Video calling

• 3D modelling

• Programming

• Gaming

A developer is writing a program to record the results of examinations taken by students in a school. (a) The program will be tested to make sure that it works. There are three types of test data that can be used to test a system: normal, abnormal and extreme. Match the explanations of what is meant by normal, abnormal and extreme test data.

• Data that is of an incorrect type

• Extreme

• Data is in the range of acceptability

• Abnormal

• Data that is on the boundary

• Normal

A developer is writing a program to record the results of examinations taken by students in a school. (b) The program collects a large amount of data and this could be stored using either a fixed solid-state drive (SSD) or cloud storage. The developer is planning to use cloud storage. Describe the advantages and disadvantages to the school of using cloud storage rather than using the SSD.

Groups:

(a) Advantage

,

(b) Disadvantage

• Cloud storage has an ongoing cost

• Users must have a reliable internet connection

• The data could be sent directly to/from the cloud from any computer/device

• There is an automatic backup of data

• Many people can share the data

• The school loses control over the storage of the data

• More security issues as multiple copies of the data are stored

• The cloud has greater storage capacity

The developer spends a great deal of time using a computer. For each of the statements given, identify a health problem and describe a possible solution. Your answers must be different in each case.

Groups:

(a) Using a mouse for a long period of time

,

(b) Sitting for too long in one position

• Solution: Use a trackerball//an ergonomic

  mouse

• Solution: Hand exercises

• Problem: Back problems

• Solution: Use a wrist rest

• Solution: Walk around//stand up

• Solution: Use a foot rest

• Solution: Use an ergonomic/adjustable chair

• Problem: Repetitive strain injury

• Solution: Sit with correct posture//with straight back

• Solution: Voice activated software

A company has an extranet. Explain what is meant by an extranet.

Extranet is a ​ (a)   controlled by a company.

A ​ (b)   network for authorised customers.

Allows access for ​ (c)   .

Examples include a ​ (d)   network that allows doctors to book appointments for patients.

• network
• private
• partners
• hospital
• public
• Internet
• school
• global