What is the main function of the controller in the CPU?

• Perform mathematical operations

• Execute program instructions

• Manage power supply

• Temporarily store data

Answer explanation

The control unit in a CPU is responsible for executing program instructions by directing the operation of the processor and coordinating the activities of the other components, making 'To execute program instructions' the correct choice.

What does ALU stand for?

• Analog Logic Unit

• Arithmetic Logic Unit

• Arithmetic Load Unit

• Advanced Logic Unit

Answer explanation

ALU stands for Arithmetic Logic Unit, which is a critical component in computers that performs arithmetic and logical operations. The other options do not accurately describe this function.

What type of memory is RAM?

• Permanently

• Non-volatile

• Volatile

• Static

Answer explanation

RAM (Random Access Memory) is classified as volatile memory because it loses its data when the power is turned off. Unlike non-volatile memory, which retains data, RAM requires a constant power supply to maintain the stored information.

What is the purpose of the program counter (PC)?

• To hold the current instruction

• To manage power consumption

• To track the next instruction

• To store data permanently

Answer explanation

The program counter (PC) register is crucial for keeping track of the next instruction to be executed in a program. It ensures the CPU knows where to fetch the next instruction from, facilitating the flow of execution.

What does BIOS use ROM for?

• To perform complex calculations

• To control communication with peripheral devices

• To improve graphics performance

• To store user data

Answer explanation

The BIOS uses ROM to control communication with peripherals, ensuring that the hardware components can interact properly with the system. This is essential for the functioning of devices like keyboards, mice, and storage drives.

What is the mainboard in a PC called?

• Power supply

• Mainboard

• RAM

• Processor

Answer explanation

The main circuit board in a PC is called the motherboard. It connects all components, including the CPU, RAM, and power supply, allowing them to communicate and function together.

What is the function of a bus in a computer system?

• Manage power supply

• Allow communication between devices

• Connect peripheral devices

• Store data

Answer explanation

Buses in a computer system serve as communication pathways that connect different components, allowing them to exchange data and instructions. This is essential for the overall functionality of the system.

What does the width of a bus determine?

• Type of CPU

• Size of RAM

• Amount of data that can be transmitted

• Speed of the processor

Answer explanation

Bus width determines the amount of data that can be transmitted simultaneously between the CPU and other components. A wider bus can carry more data at once, enhancing overall system performance.

What is the purpose of the expansion slots on the motherboard?

• To install additional hardware components

• To enhance cooling

• To store more data

• To enhance power supply

Answer explanation

Expansion slots on a motherboard are designed to install additional hardware components, such as graphics cards, sound cards, and network cards, allowing for system upgrades and enhanced functionality.

What is the speed of the CPU measured in?

• Kilohertz

• Gigahertz

• Terahertz

• Megahertz

Answer explanation

The clock speed of a CPU is typically measured in gigahertz (GHz), which represents billions of cycles per second. While kilohertz (kHz), megahertz (MHz), and terahertz (THz) are also units of frequency, GHz is the standard for modern CPUs.