WorksheetsComputer Science IGCSE
Total questions: 38
Worksheet time: 2hrs 13mins
What is the denary equivalent of 00110111
53
54
55
56
What is the binary equivalent of the denary value 240
11110000
11111000
01111000
10111000
Convert 4096 kilobytes (kB) to megabytes (MB)
2MB
1MB
4MB
8MB
Convert the hexadecimal value 4A2F into denary
18990
18991
18992
18993
The direction and method of data transmission where data is sent in one direction only, one bit at a time, along a single wire
Simplex, Parallel
Duplex, Serial
Simplex, Serial
Half-Duplex, Parallel
Explain why parity checking is done
What is meant by URL ?
Uniform Response Locator
Uniform Resource Locator
Universal Response Location
Universal Resource Location
Explain the difference between IP Address and MAC address
Write two advantages of using SSDs over HDDs for storage
State two benefits of using a USB connection
Describe what is meant by phishing and pharming
An example of magnetic storage is
(a)
Explain the terms virus and spyware
Which of the following contains registers used in the CPU ?
MDR, PC, MAR
PCR, CPR, PC
MIR, OCR, OMR
MRA, MRI, AC
Identify the component of the CPU that is responsible for decoding instructions
ALU
Control Unit
CPU
RAM
What are the stages of instruction processing ?
Fetch, Solve, Run
Decode, Execute, Store
Input, Process, Store
Fetch, Decode, Execute
Explain the main difference between a compiler and an interpreter
Give three functions of a browser
State two benefits and one drawback of using a laser printer, instead of an inkjet printer, to print the office letters.
A firewall can only be software-based
True
False
This is an input device that works by shining a light onto the surface of a document. The light source is automatically moved across the document and the reflected light is captured by mirrors and lenses.
Printer
3D Scanner
2D Scanner
Projector
This is an input device where a laser or a light source is moved across an object. The width, height and depth of the object are measured to allow a model to be created.
3D scanner
3D Printer
3D Drawer
3D Camera
This is a large input device that is usually fixed to a wall. A user can calibrate the device to make sure the sensors align with a projected image. The user can use either their finger or a special pen to make selections.
3D Board
Interactive Whiteboard
Light Projector
Screencast
Describe what is meant by hacking in the software industry ?
Describe 3 ways you can secure your data when using the internet
Explain how lossless compression would compress this file.
Give three different examples of optical storage
Identify three output devices that can be connected to a personal computer
Explain what is meant by off-line storage
Give one example of primary storage
Give two examples of secondary storage
Explain two differences between a DVD and a Blu-ray
Ann needs to store ten 8-bit color images in a file for his project. Each image is 500 pixels wide and 300 pixels high. Calculate the total file size in megabytes (MB) for all Ann’s images.
14.3MB
1.43MB
143MB
1430MB
What are the two types of compression techniques ?
Which of the following is the correct description of computer Bus ?
High speed data transmission algorithm
Memory space to store data temporarily
Signals between components
Pathway for transmitting data and instructions
Describe the following terms OMR, OCR and MICR using one sentence for each
What are the two types of subroutines in programming ?
Write an algorithm to input 1000 numbers. Count how many numbers are positive and how many numbers are zero. Then output the results. (Use pseudo code)
