Which of the following is incorrect about a control unit?

The correct answer is Option 1.

Key Points

• The statement "It is responsible for working of all Input/Output units" is incorrect in the context of the control unit.
  • The control unit is primarily responsible for directing the operation of the processor, not directly handling the working of Input/Output units.
  • It fetches instructions from memory, decodes them, and signals other components to execute the instructions.
  • While the control unit plays a role in the overall coordination of operations, the direct management of I/O units is typically handled by the I/O controller or similar dedicated components.

Additional Information

• The control unit is a fundamental component of the central processing unit (CPU) in a computer.
• It ensures instructions are executed in the correct sequence and controls the flow of data within the processor.
• Key functions of the control unit include:
  • Instruction Fetch: Retrieves program instructions from memory.
  • Instruction Decode: Interprets the instructions to determine the required operations.
  • Execution Coordination: Signals other components, such as the ALU and memory, to execute the instructions.
• The control unit does not directly interact with Input/Output devices; instead, it relies on other subsystems to manage I/O operations.