Download and practise with this ZIMSEC O-Level Computer Science Paper 1 question paper. Useful for exam revision, past paper practice, and preparation in Zimbabwe.
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This is the ZIMSEC O-Level Computer Science question paper for Paper 1. Use it for exam practice under timed conditions. The paper code is 4021/1. Time allowed: 1 hour.
# ZIMBABWE SCHOOL EXAMINATIONS COUNCIL <br> General Certificate of Education Ordinary Level
**COMPUTER SCIENCE**
4021/1
1 hour
**PAPER 1 Multiple Choice**
## SPECIMEN PAPER
Additional materials:
Multiple Choice answer sheet
Soft clean eraser
Soft pencil (type B or HB is recommended)
### INSTRUCTIONS TO CANDIDATES
Answer all questions. For each question, there are four possible answers, \(\mathbf{A}, \mathbf{B}, \mathbf{C}\) and \(\mathbf{D}\). Choose the correct answer. Record your choice in soft pencil on the separate answer sheet provided.
Read very carefully the instructions on the answer sheet.
### INFORMATION FOR CANDIDATES
There are forty questions in this paper. Each correct answer will score one mark. Any rough working should be done in this question paper.
## Question 1
A storage technology with fastest access time is
A SSD.
B HDD.
C Optical Disk.
D Flash Disk.
## Question 2
Which software is used to organize and store student data for a school?
A Presentation software
B Database software
C Graphics software
D Word processing software
## Question 3
Utility software is an example of
A application software.
B customized software.
C communication software.
D system software.
## Question 4
HDD stands for
A Hardware Disk Drive.
B High Definition Device.
C Hard Disk Drive.
D High Disk Drive.
## Question 5
Which one is a characteristic of a control system?
A Dedicated to one task
B Do not involve feedback
C Can have several tasks
D Lack of the ability to collect and analyse
## Question 6
Which sensor is used in a greenhouse?
A Pressure sensor
B Proximity sensor
C Acoustic sensor
D Humidity sensor
## Question 7
Android applications are packed in
A APK file format.
B Axe file format.
C ZIP file format.
D file format.
## Question 8
Flight simulation is used to train pilots because
A flight simulations are more realistic than flying an actual plane.
B it enables dangerous flight situations in real life to be modeled.
C the modeled plane behaves more unpredictably.
D it is easier to fly a virtual plane.
## Question 9
Which of the following logic gates represents a buffer gate?
A
B
C
D
## Question 10
The truth table for an OR gate is
A Input A Input B Output
| 0 | 0 | 0 |
| :---: | :---: | :---: |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 1 |
B Input A Input B Output
| 0 | 0 | 1 |
| :---: | :---: | :---: |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
C Input A Input B Output
| 0 | 0 | 0 |
| :--- | :--- | :--- |
| 0 | 1 | 1 |
| 1 | 0 | 1 |
| 1 | 1 | 0 |
D
| Input A | Input B | Output |
| :---: | :---: | :---: |
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 1 |
## Question 11
A hexadecimal number \(\mathbf{A D}\) in binary is
A 10101101
B 11011010
C 10110101
D 10101100
## Question 12
Which logic circuit represents the expression \(\mathbf{X}=\mathrm{A}+\mathrm{BC}\) ?
A
B
C
D
## Question 13
A device responsible for finding an optimal route through which to send data packets on a WAN is
A modem.
B router.
C layer-2 switch.
D network interface card.
## Question 14
A network model suitable for two friends sharing a PDF document using Bluetooth technology is
A PAN.
B LAN.
C Peer to peer.
D Client server.
## Question 15
A computer is unable to access the internet but can communicate with the local network devices.
What should be checked first?
A router configuration
B cable connections
C cookies
D domain name system settings
## Question 16
Error detection and correction at the destination is done in which layer of the OSI model?
A Application
B Network
C Data link
D Physical
## Question 17
Which security measure is used to ensure data integrity by keying data twice?
A Check sum
B Firewall
C Format check
D Verification
## Question 18
Authentication involves the use of
A passwords, biometric sensors and pincodes.
B firewall, magnetic stripes and pincodes.
C biometric sensors, proxy servers and tokens.
D antispyware, passwords and biometric sensors.
## Question 19
A technique of scrambling data into a format that is not readable by unauthorized users is
A updating.
B authorization.
C encryption.
D validation.
## Question 20
Which expert is hired to test security systems?
A white hat hacker
B black hat hacker
C programmer
D cracker
## Question 21
The testing strategy performed to identify bugs before releasing software to real users or the public is
A Top down testing.
B White box testing.
C Alpha testing.
D Beta testing.
## Question 22
The first step in the system development life cycle is
A system design.
B coding.
C system testing.
D preliminary investigation.
## Question 23
The best test strategy to use when testing a code that deletes an old student record is
A integration testing.
B unit testing.
C module testing.
D system testing.
## Question 24
Which system development stage performs cost benefit analysis?
A Design stage
B Feasibility
C Analysis
D Development
## Question 25
If statements and select case statements are
A decision making constraints.
B sequence constraints.
C iteration …