System Bus (Data, Address, Control) MCQs

By: Prof. Dr. Fazal Rehman Shamil | Last updated: September 20, 2024

What is the primary function of the data bus in a computer system?
a) To transfer data between the CPU, memory, and peripherals
b) To carry address information to identify memory locations
c) To manage control signals for synchronization
d) To provide power to the components
Answer: a) To transfer data between the CPU, memory, and peripherals

Which bus is responsible for specifying the memory address of the data to be read or written?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

What does the control bus manage in a computer system?
a) Signals that control and synchronize the operations of the CPU, memory, and I/O devices
b) The actual data being transferred between components
c) The addresses for memory locations
d) The power distribution to the system components
Answer: a) Signals that control and synchronize the operations of the CPU, memory, and I/O devices

How does the address bus affect the system’s memory addressing capability?
a) It determines the maximum amount of memory that can be addressed by the system
b) It controls the data transfer rate
c) It handles the synchronization of data transfers
d) It provides power to the memory modules
Answer: a) It determines the maximum amount of memory that can be addressed by the system

Which bus would carry a signal indicating a memory read or write operation?
a) Control bus
b) Data bus
c) Address bus
d) Power bus
Answer: a) Control bus

What role does the data bus play in data transfers?
a) It carries the actual data between the CPU, memory, and peripherals
b) It specifies the address where data should be read from or written to
c) It manages the control signals for proper timing of operations
d) It supplies power to the data storage devices
Answer: a) It carries the actual data between the CPU, memory, and peripherals

Which bus would typically be involved in a memory read operation?
a) Address bus (for specifying address)
b) Data bus (for transferring the data)
c) Control bus (for signaling read operation)
d) Power bus
Answer: c) Control bus (for signaling read operation)

How does the address bus impact system performance?
a) A wider address bus allows the system to access a larger memory space, potentially improving performance
b) A narrower address bus increases the speed of data transfers
c) The address bus has no impact on system performance
d) The address bus affects the power consumption of the system
Answer: a) A wider address bus allows the system to access a larger memory space, potentially improving performance

What kind of signals does the control bus carry?
a) Signals for memory read/write, interrupts, and I/O operations
b) The actual data being transferred
c) The addresses of memory locations
d) Power distribution signals
Answer: a) Signals for memory read/write, interrupts, and I/O operations

In a system with a separate data bus and address bus, what is the main benefit?
a) It allows simultaneous data and address transfers, improving overall system performance
b) It reduces the number of devices that can be connected to the system
c) It simplifies the control bus design
d) It enhances power efficiency
Answer: a) It allows simultaneous data and address transfers, improving overall system performance

What is the primary function of the control bus during a data transfer operation?
a) To manage and signal the type of operation (read or write) and synchronize the data flow
b) To transfer the data between components
c) To specify the memory address for data operations
d) To provide power to the data bus
Answer: a) To manage and signal the type of operation (read or write) and synchronize the data flow

Which bus is responsible for carrying data from the CPU to the memory and I/O devices?
a) Data bus
b) Address bus
c) Control bus
d) Power bus
Answer: a) Data bus

How does the address bus affect the system’s ability to access memory locations?
a) The width of the address bus determines the range of memory addresses that can be accessed
b) The address bus speed affects the speed of data transfers
c) The address bus has no effect on memory access capabilities
d) The address bus handles power distribution to the memory
Answer: a) The width of the address bus determines the range of memory addresses that can be accessed

Which type of bus signal indicates that a device is ready to transfer data?
a) Control signal
b) Address signal
c) Data signal
d) Power signal
Answer: a) Control signal

What is the benefit of a multiplexed address and data bus system?
a) It reduces the number of physical bus lines needed by sharing the same lines for address and data
b) It increases the speed of data transfers
c) It improves power efficiency
d) It allows for more devices to be connected
Answer: a) It reduces the number of physical bus lines needed by sharing the same lines for address and data

How does the width of the data bus affect data transfer rates?
a) A wider data bus can transfer more bits of data simultaneously, increasing the data transfer rate
b) A narrower data bus increases data transfer speeds
c) Data bus width has no impact on transfer rates
d) A wider data bus reduces the power consumption of the system
Answer: a) A wider data bus can transfer more bits of data simultaneously, increasing the data transfer rate

What does the control bus manage in terms of device operations?
a) The signaling of read and write operations, interrupts, and handshaking between devices
b) The actual data being transferred
c) The memory addresses of data
d) The power supply to devices
Answer: a) The signaling of read and write operations, interrupts, and handshaking between devices

What is the role of the address bus in a data read operation?
a) To provide the memory location from which data is to be read
b) To transfer the data from the memory
c) To manage the timing of the data transfer
d) To signal the type of operation being performed
Answer: a) To provide the memory location from which data is to be read

How does the control bus contribute to system synchronization?
a) By carrying signals that ensure proper timing and coordination of data transfers and operations
b) By increasing the speed of data transfers
c) By specifying memory addresses
d) By providing power to the system
Answer: a) By carrying signals that ensure proper timing and coordination of data transfers and operations

Which bus type would be involved in specifying which memory location data should be read from or written to?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

In a computer system, which bus is used to transfer actual data between the CPU and memory?
a) Data bus
b) Address bus
c) Control bus
d) Power bus
Answer: a) Data bus

What does the control bus signal for during a write operation?
a) It signals the start of a write operation and manages the timing of the data transfer
b) It specifies the memory address for the write operation
c) It carries the actual data to be written
d) It supplies power to the write operation
Answer: a) It signals the start of a write operation and manages the timing of the data transfer

How does the address bus impact system expandability?
a) A wider address bus allows for a larger addressable memory space, facilitating system expansion
b) The address bus width has no impact on system expandability
c) A narrower address bus increases system performance
d) The address bus affects the power consumption of the system
Answer: a) A wider address bus allows for a larger addressable memory space, facilitating system expansion

What does the control bus signal during an interrupt request?
a) It signals the CPU to pause its current operations and handle the interrupt
b) It specifies the memory address for the interrupt
c) It carries the data related to the interrupt
d) It provides power to the interrupting device
Answer: a) It signals the CPU to pause its current operations and handle the interrupt

Which bus is used for communicating control signals in a multiprocessor system?
a) Control bus
b) Data bus
c) Address bus
d) Power bus
Answer: a) Control bus

What is the role of the address bus in a data write operation?
a) To specify the address in memory where the data should be written
b) To transfer the data to the memory
c) To manage the timing of the write operation
d) To signal the start of the write operation
Answer: a) To specify the address in memory where the data should be written

What does the data bus carry during a memory read operation?
a) The data being read from memory
b) The address of the memory location
c) The control signals for the operation
d) The power supply for the memory
Answer: a) The data being read from memory

How does the control bus affect data transfers between devices?
a) It ensures that data transfers are properly timed and coordinated
b) It increases the speed of data transfers
c) It specifies the memory addresses for data operations
d) It provides power to the devices involved in the transfer
Answer: a) It ensures that data transfers are properly timed and coordinated

What is the primary function of the address bus in a computer system?
a) To carry the address of the memory location for data access
b) To transfer data between components
c) To manage control signals for operations
d) To supply power to the memory
Answer: a) To carry the address of the memory location for data access

Which bus type would handle signals indicating that a device is ready for data transfer?
a) Control bus
b) Data bus
c) Address bus
d) Power bus
Answer: a) Control bus

How does the data bus width influence system performance?
a) A wider data bus can transfer more bits of data simultaneously, improving performance
b) A narrower data bus enhances performance
c) Data bus width does not affect performance
d) A wider data bus reduces power consumption
Answer: a) A wider data bus can transfer more bits of data simultaneously, improving performance

What does the control bus signal during a data transfer operation?
a) It signals the type of operation (read or write) and coordinates the timing
b) It carries the data being transferred
c) It specifies the address for the data transfer
d) It supplies power to the system components
Answer: a) It signals the type of operation (read or write) and coordinates the timing

Which bus would be used to identify the memory address for a data transfer?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

In a computer system, what is the primary role of the data bus during a write operation?
a) To carry the data that is being written to memory
b) To specify the memory address for the write operation
c) To manage control signals for the operation
d) To provide power to the memory
Answer: a) To carry the data that is being written to memory

What is the function of the control bus during a memory access operation?
a) To manage and coordinate the operation by sending signals for read or write actions
b) To carry the actual data being accessed
c) To specify the memory address for the access
d) To supply power to the memory
Answer: a) To manage and coordinate the operation by sending signals for read or write actions

Which bus would handle the actual data transfer in a computer system?
a) Data bus
b) Address bus
c) Control bus
d) Power bus
Answer: a) Data bus

What does the address bus determine in a computer system?
a) The memory locations that can be accessed by the system
b) The speed of data transfers
c) The type of control signals used
d) The power supply for the system
Answer: a) The memory locations that can be accessed by the system

How does the control bus impact system operations?
a) By signaling and managing the timing of data transfers and other operations
b) By increasing data transfer rates
c) By specifying memory addresses
d) By providing power to components
Answer: a) By signaling and managing the timing of data transfers and other operations

Which bus is involved in specifying the source or destination address for a data transfer?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

What is the primary function of the data bus during a memory read operation?
a) To carry the data read from the memory to the CPU
b) To specify the memory address for the read operation
c) To signal the start of the read operation
d) To provide power to the memory
Answer: a) To carry the data read from the memory to the CPU

What role does the control bus play in coordinating multiple device operations?
a) It sends signals to synchronize operations and manage data transfers among devices
b) It increases the speed of data transfers between devices
c) It specifies the addresses of devices
d) It provides power to the devices
Answer: a) It sends signals to synchronize operations and manage data transfers among devices

How does the address bus width affect system memory capacity?
a) A wider address bus allows the system to address more memory locations, increasing capacity
b) A narrower address bus increases the speed of memory access
c) The address bus width does not affect memory capacity
d) A wider address bus reduces the power consumption of the system
Answer: a) A wider address bus allows the system to address more memory locations, increasing capacity

What does the control bus manage during an interrupt request?
a) It signals the CPU to handle the interrupt and manage the operation timing
b) It specifies the memory address related to the interrupt
c) It carries the data associated with the interrupt
d) It supplies power to the interrupting device
Answer: a) It signals the CPU to handle the interrupt and manage the operation timing

Which bus is responsible for sending and receiving data between the CPU and I/O devices?
a) Data bus
b) Address bus
c) Control bus
d) Power bus
Answer: a) Data bus

What is the primary function of the address bus in specifying memory operations?
a) To indicate the memory location for data access
b) To transfer the actual data to and from memory
c) To manage the control signals for data operations
d) To supply power to the memory
Answer: a) To indicate the memory location for data access

How does the data bus influence overall system performance?
a) By enabling faster data transfers between components with a wider bus
b) By affecting the memory addressing capabilities
c) By managing control signals for operations
d) By providing power to system components
Answer: a) By enabling faster data transfers between components with a wider bus

What type of signals are transmitted on the control bus during a read operation?
a) Signals indicating the start of a read operation and managing timing
b) The actual data being read from memory
c) The addresses of memory locations
d) Power supply signals
Answer: a) Signals indicating the start of a read operation and managing timing

Which bus determines the range of addresses that can be used by a system?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

What is the role of the data bus in relation to the address bus?
a) The data bus carries the actual data, while the address bus specifies where the data should be read from or written to
b) The data bus specifies the memory addresses, while the address bus carries the data
c) Both buses are used interchangeably for data and address transfer
d) The data bus and address bus are not related
Answer: a) The data bus carries the actual data, while the address bus specifies where the data should be read from or written to

How does the control bus affect synchronization of data transfers?
a) By providing signals to ensure that data transfers are properly timed and coordinated
b) By increasing the speed of the data transfer
c) By specifying the memory addresses for data operations
d) By supplying power to the data bus
Answer: a) By providing signals to ensure that data transfers are properly timed and coordinated

What is the function of the control bus during a memory write operation?
a) To signal the start of the write operation and manage timing
b) To transfer the data to be written
c) To specify the address for the write operation
d) To provide power to the memory
Answer: a) To signal the start of the write operation and manage timing

Which bus carries the memory address information used in data operations?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

How does the data bus width impact the efficiency of data transfers?
a) A wider data bus allows for more data to be transferred simultaneously, increasing efficiency
b) A narrower data bus increases efficiency
c) Data bus width does not affect efficiency
d) A wider data bus reduces system performance
Answer: a) A wider data bus allows for more data to be transferred simultaneously, increasing efficiency

What is the role of the address bus in a multiprocessor system?
a) To provide memory addresses for data access, ensuring that each processor can access the correct memory locations
b) To carry data between processors
c) To manage control signals for processor synchronization
d) To supply power to the processors
Answer: a) To provide memory addresses for data access, ensuring that each processor can access the correct memory locations

Which bus is responsible for handling the control signals that dictate when data should be read or written?
a) Control bus
b) Data bus
c) Address bus
d) Power bus
Answer: a) Control bus

What role does the control bus play during an I/O operation?
a) It signals the start and timing of I/O operations, coordinating communication between the CPU and I/O devices
b) It transfers the data to and from the I/O devices
c) It specifies the address of the I/O device
d) It provides power to the I/O devices
Answer: a) It signals the start and timing of I/O operations, coordinating communication between the CPU and I/O devices

How does the address bus width influence the system’s maximum addressable memory?
a) A wider address bus allows for a larger range of addressable memory, increasing the system’s maximum memory capacity
b) A narrower address bus increases the addressable memory
c) The address bus width has no impact on memory capacity
d) A wider address bus reduces the speed of memory access
Answer: a) A wider address bus allows for a larger range of addressable memory, increasing the system’s maximum memory capacity

What does the control bus manage during a data transfer between devices?
a) The timing and coordination of the data transfer
b) The actual data being transferred
c) The memory address for the data transfer
d) The power supply for the devices involved
Answer: a) The timing and coordination of the data transfer

Which bus is used to specify the memory location for data access during read and write operations?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

What is the primary purpose of the data bus in data transfer operations?
a) To carry the data between the CPU, memory, and peripherals
b) To specify the memory address for data access
c) To manage control signals for data operations
d) To supply power to the system components
Answer: a) To carry the data between the CPU, memory, and peripherals

How does the control bus contribute to handling interrupts?
a) It sends signals to the CPU to handle interrupts and manage the timing of the interrupt process
b) It specifies the memory address related to the interrupt
c) It carries the data associated with the interrupt
d) It provides power to the interrupting device
Answer: a) It sends signals to the CPU to handle interrupts and manage the timing of the interrupt process

What is the role of the address bus in the operation of a computer system?
a) To carry the address of the memory location for data operations
b) To transfer data between the CPU and memory
c) To manage the timing of data transfers
d) To supply power to the system components
Answer: a) To carry the address of the memory location for data operations

Which bus type is involved in managing data transfers between the CPU and memory?
a) Data bus
b) Address bus
c) Control bus
d) Power bus
Answer: a) Data bus

How does the address bus width affect system performance?
a) A wider address bus allows for more memory addresses to be used, potentially improving system performance
b) A narrower address bus increases performance
c) The address bus width has no effect on performance
d) A wider address bus reduces system efficiency
Answer: a) A wider address bus allows for more memory addresses to be used, potentially improving system performance

What is the function of the control bus in relation to the data bus?
a) The control bus manages and synchronizes the operations of the data bus by sending control signals
b) The control bus carries the actual data being transferred
c) The control bus specifies the memory addresses for data transfers
d) The control bus provides power to the data bus
Answer: a) The control bus manages and synchronizes the operations of the data bus by sending control signals

Which bus would carry a signal indicating that a device is ready to transfer data?
a) Control bus
b) Data bus
c) Address bus
d) Power bus
Answer: a) Control bus

How does the width of the data bus impact data transfer speed?
a) A wider data bus can transfer more bits of data simultaneously, increasing the transfer speed
b) A narrower data bus increases data transfer speed
c) Data bus width has no impact on transfer speed
d) A wider data bus reduces data transfer speed
Answer: a) A wider data bus can transfer more bits of data simultaneously, increasing the transfer speed

What role does the address bus play during a read operation?
a) It provides the memory location from which data should be read
b) It carries the data that is read from memory
c) It manages the timing of the read operation
d) It signals the start of the read operation
Answer: a) It provides the memory location from which data should be read

How does the control bus ensure proper synchronization of operations?
a) By sending signals that coordinate timing and control of operations across the system
b) By increasing the speed of data transfers
c) By specifying the addresses for data operations
d) By providing power to the system components
Answer: a) By sending signals that coordinate timing and control of operations across the system

What is the impact of the data bus width on the system’s data transfer rate?
a) A wider data bus allows for faster data transfers due to the ability to transfer more bits simultaneously
b) A narrower data bus increases the data transfer rate
c) Data bus width does not affect the transfer rate
d) A wider data bus reduces the data transfer rate
Answer: a) A wider data bus allows for faster data transfers due to the ability to transfer more bits simultaneously

What role does the control bus play in a memory write operation?
a) It signals the start of the write operation and manages the timing of the data transfer
b) It carries the data to be written to memory
c) It specifies the address where data should be written
d) It supplies power to the memory module
Answer: a) It signals the start of the write operation and manages the timing of the data transfer

Which bus is involved in specifying the address for a memory read or write operation?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

What is the primary role of the data bus in data transfer operations?
a) To carry the data being transferred between components
b) To specify the memory address for data operations
c) To manage the control signals for the operation
d) To supply power to the system
Answer: a) To carry the data being transferred between components

How does the address bus width impact memory addressing?
a) A wider address bus allows for a larger range of memory addresses, increasing the addressable memory space
b) A narrower address bus increases the addressable memory space
c) Address bus width does not affect memory addressing
d) A wider address bus reduces memory addressing speed
Answer: a) A wider address bus allows for a larger range of memory addresses, increasing the addressable memory space

What does the control bus manage in terms of data transfers?
a) It manages the timing and coordination of data transfers between components
b) It carries the actual data being transferred
c) It specifies the memory addresses involved in the transfer
d) It provides power to the data transfer process
Answer: a) It manages the timing and coordination of data transfers between components

Which bus is responsible for transferring data between the CPU and memory?
a) Data bus
b) Address bus
c) Control bus
d) Power bus
Answer: a) Data bus

How does the width of the address bus affect a system’s memory capacity?
a) A wider address bus allows the system to address a larger memory space, increasing capacity
b) A narrower address bus reduces the memory capacity
c) Address bus width has no effect on memory capacity
d) A wider address bus decreases the system’s memory access speed
Answer: a) A wider address bus allows the system to address a larger memory space, increasing capacity

What function does the control bus serve during an I/O operation?
a) It signals and manages the timing of I/O operations, coordinating between the CPU and I/O devices
b) It carries the data to and from I/O devices
c) It specifies the address of the I/O device
d) It provides power to the I/O devices
Answer: a) It signals and manages the timing of I/O operations, coordinating between the CPU and I/O devices

What is the primary function of the address bus in a data operation?
a) To specify the memory address for reading or writing data
b) To transfer the actual data between components
c) To manage control signals for data operations
d) To supply power to the memory
Answer: a) To specify the memory address for reading or writing data

Which bus type is used for carrying control signals in a computer system?
a) Control bus
b) Data bus
c) Address bus
d) Power bus
Answer: a) Control bus

How does the data bus width influence the efficiency of data transfers?
a) A wider data bus allows more data to be transferred simultaneously, improving efficiency
b) A narrower data bus increases efficiency
c) Data bus width has no impact on efficiency
d) A wider data bus reduces efficiency
Answer: a) A wider data bus allows more data to be transferred simultaneously, improving efficiency

What role does the control bus play during a data transfer operation?
a) It provides the necessary signals to manage and synchronize the data transfer
b) It carries the data being transferred
c) It specifies the memory address for the data transfer
d) It supplies power to the data transfer process
Answer: a) It provides the necessary signals to manage and synchronize the data transfer

Which bus is responsible for providing the memory address in a read or write operation?
a) Address bus
b) Data bus
c) Control bus
d) Power bus
Answer: a) Address bus

What is the primary purpose of the control bus in coordinating operations?
a) To send signals that coordinate and synchronize the timing of various operations
b) To transfer the data between components
c) To specify memory addresses for data operations
d) To supply power to the system components
Answer: a) To send signals that coordinate and synchronize the timing of various operations

Read More Computer Architecture MCQs

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  6. SET 6: Computer Architecture MCQs
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  8. SET 8: Computer Architecture MCQs
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