Revision DEC30043

What is a microprocessor?

• A small memory unit

• A circuit that stores data

• A programmable device that processes data

• A data input device

Which of the following is NOT a component of a basic microprocessor-based system?

• CPU

• Hard disk

• Memory

• I/O ports

ARM is best described as:

• A microcontroller programming language

• A family of RISC-based processors

• An operating system

• A type of I/O interface

The main function of the bus in a microprocessor system is to:

• Store data permanently

• Increase processing speed

• Transfer data between CPU, memory, and I/O

• Display output on screen

The function of the Memory Protection Unit (MPU) is to:

• Improve processing speed

• Control bus voltage

• Enforce access control to memory regions

• Enhance debugging

Which ARM system bus handles instruction fetches?

• D-Bus

• I-Bus

• S-Bus

• P-Bus

What is the main function of the Program Counter (PC)?

• Stores the last executed instruction

• Holds data from memory

• Points to the next instruction to execute

• Stores the return address

The Stack Pointer (SP) is mainly used for:

• Loop execution

• Arithmetic operations

• Function call and return address management

• Flag register access

Which register stores the return address during a function call?

• R0

• Program Counter (PC)

• Stack Pointer (SP)

• Link Register (LR)

Which mode is used by the processor when executing interrupt service routines?

• Thread Mode

• Handler Mode

• Supervisor Mode

• User Mode