Chapter 3 Hardware (IGCSE Computer Science)

What is the main function of the Control Unit (CU) in a CPU?

• To perform arithmetic operations

• To store data temporarily

• To read and interpret instructions

• To manage input/output devices

Which of the following is NOT a component of the von Neumann architecture?

• Graphics Processing Unit (GPU)

• Random Access Memory (RAM)

• Control Unit (CU)

• Arithmetic and Logic Unit (ALU)

What type of memory is referred to as Immediate Access Store (IAS)?

• RAM

• Secondary storage

• Cache

• ROM

Which of the following is an example of an input device?

• Monitor

• Speaker

• Printer

• Keyboard

What is the purpose of the Fetch-Decode-Execute cycle?

• To execute instructions in sequence

• To increase CPU clock speed

• To store data in RAM

• To manage input/output devices

Which type of bus carries addresses throughout the computer system?

• Data bus

• Control bus

• Address bus

• Instruction bus

What is the main advantage of using cache memory?

• It can store more data than RAM

• It has faster data access times than RAM

• It is located outside the CPU

• It is cheaper than RAM

Which of the following is a characteristic of QR codes compared to traditional barcodes?

• They require special scanners

• They can hold less information

• They can be read by smartphone cameras

• They are more expensive to produce

What device converts physical values into discrete digital values?

• Digital to Analogue Converter (DAC)

• Analogue to Digital Converter (ADC)

• Microprocessor

• Sensor

Which type of sensor measures the amount of water vapor in the air?

• Temperature Sensor

• Moisture Sensor

• Light Sensor

• Humidity Sensor