Difference Between Interrupt and Trap

The main difference between trap and interrupt is that trap is triggered by a user program to invoke OS functionality while interrupt is triggered by a hardware device to allow the processor to execute the corresponding interrupt handler routine. An operating system is event-driven.

1. Which interrupt is called as trap?
2. What is difference between interrupt and exception?
3. What is a trap instruction?
4. What is the interrupt?
5. What are the different types of interrupts?
6. Is system call a trap?
7. Which exception is used for normal interrupt handling?
8. Why are interrupts asynchronous?
9. How many types of exceptions are there?
10. What is the purpose of interrupt?
11. What causes unexpected kernel mode trap?
12. Which Interrupt has the highest priority?

Which interrupt is called as trap?

In computing and operating systems, a trap, also known as an exception or a fault, is typically a type of synchronous interrupt caused by an exceptional condition (e.g., breakpoint, division by zero, invalid memory access).

What is difference between interrupt and exception?

Exceptions and interrupts are unexpected events which will disrupt the normal flow of execution of instruction(that is currently executing by processor). An exception is an unexpected event from within the processor. Interrupt is an unexpected event from outside the process.

What is a trap instruction?

A TRAP is a hardware interrupt- A TRAP instruction makes the context switch from user-mode to kernel-mode, and is used when a program in user-mode needs to execute a system call (routine that can only be handled by the operating system) and then returns back to user-mode to execute the next instruction- Allows the ...

What is the interrupt?

An interrupt is a signal sent to the processor that interrupts the current process. It may be generated by a hardware device or a software program. A hardware interrupt is often created by an input device such as a mouse or keyboard.

What are the different types of interrupts?

Types of Interrupt

• Hardware Interrupts. An electronic signal sent from an external device or hardware to communicate with the processor indicating that it requires immediate attention. ...
• Software Interrupts. ...
• Level-triggered Interrupt. ...
• Edge-triggered Interrupt. ...
• Shared Interrupt Requests (IRQs) ...
• Hybrid. ...
• Message–Signalled. ...
• Doorbell.

Is system call a trap?

System calls are accomplished by moving parameters to registers and then calling int 2e to trap into the kernel. Exceptions and interrupts, whether arising from external events, internal faults, or software generated using the int instruction, are vectored throught Interrupt Descriptor Table, the IDT.

Which exception is used for normal interrupt handling?

This is necessary to prevent exceptions and interrupts from occuring during handler execution. In order to be able to do this, we need an additional register that can be used to mask exception and interrupt types. This is called the Status register.
...
Status register.

Why are interrupts asynchronous?

an interrupt is an asynchronous signal indicating the need for attention or a synchronous event in software indicating the need for a change in execution.

How many types of exceptions are there?

There are mainly two types of exceptions in Java as follows: Checked exception. Unchecked exception.

What is the purpose of interrupt?

Interrupts are important because they give the user better control over the computer. Without interrupts, a user may have to wait for a given application to have a higher priority over the CPU to be ran. This ensures that the CPU will deal with the process immediately.

What causes unexpected kernel mode trap?

The error is usually triggered by two situations that occur in the kernel mode: either the CPU generated a condition that the kernel is not allowed to catch or the condition is an unrecoverable error. The most common cause is hardware failure, mostly due to faulty or mismatched memory.

Which Interrupt has the highest priority?

TRAP is the internal interrupt that has the highest priority among all interrupts except the divide by zero exception.