Question: Which Interrupt Is Unmaskable Mcq?

Which Interrupt has the highest priority?

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

Which interrupt has the lowest priority?

INTR. It is a maskable interrupt, having the lowest priority among all interrupts. It can be disabled by resetting the microprocessor.

What are different types of interrupt?

Types of InterruptHardware 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.More items…

What is called by an 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.

Can interrupts be interrupted?

Normally, an interrupt service routine proceeds until it is complete without being interrupted itself in most of the systems. However, If we have a larger system, where several devices may interrupt the microprocessor, a priority problem may arise. … This “interrupt of an interrupt” is called a nested interrupt.

What does ISR stand for?

Intelligence, Surveillance, and ReconnaissanceIntelligence, Surveillance, and Reconnaissance (ISR)

What is a trap OS?

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 an ISR Mcq?

This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Interrupts and Interrupt Service Routines”. … Explanation: An interrupt transfers the control to interrupt service routine (ISR). After executing ISR, the control is transferred back again to the main program.

What is the purpose of interrupts?

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.

How does interrupt work?

An interrupt is a signal to the processor emitted by hardware or software indicating an event that needs immediate attention. Whenever an interrupt occurs, the controller completes the execution of the current instruction and starts the execution of an Interrupt Service Routine (ISR) or Interrupt Handler.

What happens when an interrupt occurs?

When an interrupt occurs, it causes the CPU to stop executing the current program. The control then passes to a special piece of code called an Interrupt Handler or Interrupt Service Routine. The interrupt handler will process the interrupt and resume the interrupted program.

Which interrupt is Unmaskable?

INTR, RST 7.5, RST 6.5, RST 5.5 are maskable interrupts in 8085 microprocessor. Non-Maskable Interrupts are those which cannot be disabled or ignored by microprocessor. TRAP is a non-maskable interrupt. It consists of both level as well as edge triggering and is used in critical power failure conditions.

Which bit size determines the slowest frequency?

2. Which bit size determines the slowest frequency? Explanation: The pre-scalar value determines the slowest frequency that can be generated from a given clock input. Actually the bit size are determined by the pre-scalar value and the conuter size.

What does i2c stand for?

Inter-ICShort for Inter-IC, a type of bus designed by Philips Semiconductors in the early 1980s, which is used to connect integrated circuits (ICs). I2C is a multi-master bus, which means that multiple chips can be connected to the same bus and each one can act as a master by initiating a data transfer.

What are the three types of interrupts?

Types of Interrupts Internal Interrupt. Software Interrupt. External Interrupt.