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ZIMSEC O Level · 7014/1 · N2016

Computer Science Paper 1 November 2016

Questions
40
Time allowed
60 min
Syllabus code
7014/1

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Questions
40
Pass mark
24
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Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 1

Input and output devices
Which of the following devices is an output device?
  1. Amouse
  2. Bjoystick
  3. Cscanner
  4. Dmotor

Question 2

Computer system structure
The speed of a processor can be measured in
  1. Amegabytes.
  2. Bgigabytes.
  3. Cgigahertz.
  4. Dkilobytes.

Question 3

Data validation

A car registration must now be in the format letter; letter; number; number; letter; letter; letter.

To ensure that this arrangement is correct when data is entered into a database, which check would be used?

  1. Aa range check
  2. Ba check digit
  3. Ca picture check
  4. Da presence check

Question 4

Number systems
37 converted to binary is
  1. A100101.
  2. B101100.
  3. C110100.
  4. D111000.

Question 5

Storage
1 megabyte of memory contains
  1. A1024 bits.
  2. B1024 bytes.
  3. C1024 kilobytes.
  4. D1024 megabytes.

Question 6

Data representation
Modern computers are all based on digital technology. This means that data is
  1. Ahandled by varying the electrical voltage.
  2. Bstored as a set of decimal numbers.
  3. Chandled as on/off electrical signals.
  4. Dalways stored using ASCII code.

Question 7

Data protection
The Data Protection Act forbids the passing of personal data
  1. Ato a third party under any circumstance.
  2. Boutside Zimbabwe.
  3. Cto the data subject.
  4. Dto a third party without the data subject's permission.

Question 8

Data capture
What device is used to enter data into a burglar alarm system?
  1. Ascanner
  2. Bsensor
  3. Clight pen
  4. Dkeyboard

Question 9

Databases
Often, data is stored in a database in coded form. An advantage of this is that
  1. Ahackers will not be able to understand it.
  2. Bit is easier for the software to sort the data.
  3. Cit does not need validating.
  4. Dit takes less storage space.

Question 10

Applications of ICT
A small computer is used in a car to show how far the driver can expect to go before needing to refuel. This type of computer system is
  1. Aprocess control.
  2. Ba simulation.
  3. Can embedded system.
  4. Dinteractive.

Question 11

Control systems
Which of these is an example of computer control?
  1. Aweather forecasting
  2. Beconomic modelling
  3. Crobotics
  4. Ddata logging

Question 12

Modelling and simulation

A computer game allows the player to simulate driving cars around city streets.

Which of the following is an input into the system?

  1. Athe detection of a crash
  2. Bmovement of a paddle on the console
  3. Cthe car engine sound
  4. Darrival at a cross-road

Question 13

Modelling and simulation

Computer simulations are sometimes used to predict the performance of a real-life situation, such as the crash behaviour of cars.

One reason for using computers in this way is

  1. Acomputer generated results are likely to be more reliable.
  2. Byou can be sure that all relevant factors are taken into account.
  3. Cmore variables can be investigated at the same time.
  4. Dmuch greater precision is possible.

Question 14

Applications
Software that is used to help in the design of engineering components is called
  1. ACAM.
  2. BCAL.
  3. CCAD.
  4. DCAT.

Question 15

Control systems

A computer-controlled greenhouse is set to turn the heater on if it gets too cold and turn it off if it gets too hot.

A system like this where output affects the next input makes use of

  1. Afeedback.
  2. Bbatch processing.
  3. Cmultiprogramming.
  4. DOMR.

Question 16

Security
The most reliable way of ensuring that data is not lost because of malicious activities is
  1. Ato install anti-virus software.
  2. Bto carry out regular backups.
  3. Cnot to open emails.
  4. Dto install a firewall.

Question 17

Security
A computer virus
  1. Aalways damages data.
  2. Bis likely to damage hardware.
  3. Cis designed to copy itself.
  4. Donly infects data files.

Question 18

Applications of ICT
Hospitals use computer techniques to scan patients' bodies. This is called
  1. ACAD.
  2. BCAT.
  3. CCAM.
  4. DCAL.

Question 19

Data capture
Which item of information is NOT represented on barcodes found on supermarket products?
  1. ACheck digit
  2. BCompany code
  3. CProduct code
  4. DProduct price

Question 20

Systems analysis
Fact finding is done at which stage?
  1. ADesign
  2. BAnalysis
  3. CImplementation
  4. DDevelopment

Question 21

Systems analysis
Deciding where the data will come from in a project is looked at during the
  1. Adesign stage.
  2. Bimplementation stage.
  3. Canalysis stage.
  4. Dproblem identification stage.

Question 22

Systems analysis
When planning a project, staffing issues will be principally addressed in the
  1. Adesign phase
  2. Banalysis phase
  3. Cmaintenance phase
  4. Dfeasibility study phase

Question 23

Systems analysis
When a new system is run side-by-side with the old system, this is called
  1. Apilot running.
  2. Ball at once.
  3. Cmodule testing.
  4. Dparallel running.

Question 24

Control systems

Some computer-controlled systems have serious safety implications.

What is the best way to guard against a system failure?

  1. AThorough alpha testing of the software
  2. BMaking sure that the hardware is up to date
  3. CHaving a back-up computer system
  4. DProviding a human back-up system

Question 25

Programming
An algorithm can be described by using a series of program-like statements but without writing the program. This is called
  1. Ahigh level code.
  2. Blow level code.
  3. Cobject code.
  4. Dpseudocode.

Question 26

Flowcharts
A terminal symbol in a flow chart indicates
  1. Aend.
  2. Bprocessing.
  3. Cinput and output.
  4. Ddecision.

Question 27

Programming
Structured programming is
  1. Ausing classes.
  2. Busing structures in the program.
  3. Cdividing a program into different program modules.
  4. Dcoding a program.

Question 28

Flowcharts
A decision box in a program flow chart has
  1. Aone input and one output.
  2. Bone input and two outputs.
  3. Ctwo inputs and one output.
  4. Dtwo inputs and two outputs.

Question 29

Flowcharts
A diagram that represents an algorithm is called
  1. Aa program flow chart.
  2. Ba systems flow chart.
  3. Ca data flow diagram.
  4. Dan entity relation diagram.

Question 30

Programming
The steps necessary to solve a problem and used to design a computer program are called
  1. Asystems.
  2. Balgorithms.
  3. Cdata flows.
  4. Dprocesses.

Question 31

Programming
Which of the following is not a control structure?
  1. Asequential
  2. Bselection
  3. Crepetitive
  4. Dalgorithm

Question 32

Programming

Read the algorithm below.

Input A, B
If A > B then
T = A
A = B
End if
Output A, T
End

Write down the output if the following two numbers are input: 41, 38

  1. A38, 41
  2. B41, 38
  3. C83, 14
  4. D14, 83

Question 33

Internet
An advantage of shopping over the internet is that
  1. Athere is a wide range of goods to choose from.
  2. Bthe prices are always less.
  3. Cthe suppliers are always reliable.
  4. Dsending money over the internet is secure.

Question 34

Internet
The reason why image files are often compressed on the internet is
  1. Athe image quality is improved.
  2. Bthey transmit faster.
  3. Cfewer pixels are used in the display.
  4. Dbrowsers can only display compressed images.

Question 35

Networks
A system of web pages designed for use within one organisation is called
  1. Ainternal mail.
  2. Ban intranet.
  3. Can extranet.
  4. Dan internet.

Question 36

Applications of ICT
Some people are unhappy about using on-line banking. One reason is
  1. Athe bank is more likely to make mistakes.
  2. Bfear that their details may be accessible to others.
  3. Cthe service could cost more.
  4. Dthey will not be able to write cheques.

Question 37

Systems analysis
Which of the following is likely to take place in the design stage of systems development?
  1. Atesting the software
  2. Bfilling in questionnaires
  3. Cdetermining the contents of data tables
  4. Dparallel running

Question 38

ICT careers
Which of the following is a job normally carried out by a systems analyst?
  1. Aproducing a program specification
  2. Bwriting the program code
  3. Ctesting the program
  4. Dleading the programming project

Question 39

Spreadsheets

In a spreadsheet, cell C12 contains the value 6, D12 contains the value 12 and D14 the value 10. Cell E16 contains the expression =C12*(D12 - D14).

What would be displayed in cell E16?

  1. A-12
  2. B12
  3. C62
  4. D8

Question 40

Spreadsheets

In a spreadsheet, cell A1 contains the value 4, A2 contains 5 and A3 contains 6. Cell A4 contains the expression =(A1 + A2)*A3.

What would be displayed in cell A4?

  1. A34
  2. B1.5
  3. C24
  4. D54

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