Understanding Interrupts and PCB in Operating Systems

Which of the following best defines an interrupt in an operating system?

• A mechanism to handle errors.

• A signal to the processor emitted by hardware or software.

• A way to manage memory allocation.

• A method for multitasking.

What happens when an interrupt occurs?

• The processor ignores the interrupt.

• The processor stops executing the current program and executes the interrupt service routine.

• The processor immediately switches off.

• The processor continues with the next instruction.

Which register typically holds the address of the next instruction to be executed after an interrupt?

• Instruction Register

• Program Counter

• Stack Pointer

• Accumulator

What is the purpose of an interrupt vector table?

• To store instructions for handling different interrupts.

• To manage the order of process execution.

• To handle memory allocation.

• To store user data.

Which type of interrupt can be temporarily ignored by the CPU?

• Non-maskable interrupt

• Software interrupt

• Maskable interrupt

• Hardware interrupt

What is a hardware interrupt?

• An interrupt generated by a software error.

• An interrupt initiated by an external hardware device.

• An interrupt caused by the CPU.

• An interrupt that cannot be disabled.

Which of the following is an example of a hardware interrupt?

• Divide by zero error

• System call

• Keyboard input

• Memory access violation

What is a software interrupt?

• An interrupt triggered by hardware failure.

• An interrupt generated within the processor by executing an instruction.

• An interrupt caused by power failure.

• An interrupt that comes from the network.

Which instruction is commonly used to generate a software interrupt?

• INT

• JMP

• CALL

• RET

Which of the following is not a type of interrupt?

• Timer interrupt

• I/O interrupt

• CPU scheduling interrupt

• Memory interrupt