System Bus 11-12 grades

What is the function of the system bus?

• Connects the CPU, memory, and peripheral devices

• Stores data permanently

• Increases processing speed

• Executes program instructions

Answer explanation

The system bus is essential for connecting the CPU, memory, and peripheral devices, allowing them to communicate and transfer data. This makes it the correct choice, as the other options describe different functions.

What are the three main buses in a computer system?

• Address, Data, Control

• Memory, Power, Control

• Input, Output, Processing

• CPU, RAM, Storage

Answer explanation

The three main buses in a computer system are the Address bus, which carries memory addresses; the Data bus, which transfers data; and the Control bus, which sends control signals. Thus, the correct answer is Address, Data, Control.

What does the address bus do?

• Transmits control signals

• Sends memory addresses

• Stores data

• Manages power distribution

Answer explanation

The address bus is responsible for sending memory addresses from the CPU to other components, allowing them to access specific locations in memory. This makes 'Sends memory addresses' the correct choice.

How does a wider address bus affect the system?

• Increases memory capacity

• Reduces energy consumption

• Speeds up data transfer

• Improves clock frequency

Answer explanation

A wider address bus allows the system to access more memory addresses, thereby increasing the overall memory capacity. This means the system can utilize more RAM, enhancing its performance and capability.

What does the data bus transmit?

• Only instructions

• Data and instructions

• Only memory addresses

• Control signals

Answer explanation

The data bus transmits both data and instructions between the CPU and other components, making 'Data and instructions' the correct choice. It is essential for the overall communication within the computer system.

What is true about the control bus?

• It only transmits clock signals

• Used for power management

• Processes control signals

• Stores program instructions

Answer explanation

The control bus is responsible for processing control signals that manage the operations of the CPU and other components. It does not only transmit clock signals, manage power, or store program instructions.

Which signal is NOT sent through the control bus?

• Write to memory

• Read from memory

• Data transmission

• Interrupt request

Answer explanation

The control bus is responsible for signals like 'write to memory', 'read from memory', and 'interrupt request'. 'Data transmission' refers to the actual data being moved, which is handled by the data bus, not the control bus.

What is the role of the clock signal?

• Synchronizes operations

• Stores memory addresses

• Transfers data

• Controls the power source

Answer explanation

The clock signal is crucial in digital circuits as it synchronizes operations, ensuring that all components work in harmony at the same time. This coordination is essential for reliable data processing and communication.

How many memory cells can a 16-bit address bus address?

• 256

• 32,768

• 65,536

• 128,000

Answer explanation

A 16-bit address bus can address 2^16 memory locations. This equals 65,536, making it the correct answer. Each address corresponds to a unique memory cell.

What determines data transmission capacity?

• Data bus width

• Operating system type

• Cache memory size

• Power source speed

Answer explanation

Data transmission capacity is primarily determined by the data bus width, which defines how much data can be transmitted simultaneously. A wider data bus allows for greater data throughput compared to the other options.