Computer Science - Computer Fundamentals - Discussion

Interrupt Service Routine (ISR).

A section of code to which control is transferred when a processor is interrupted is known as an Interrupt Service Routine (ISR). The processor executes the ISR and returns to the next instruction of the main program.

M- Memory.

Definition of SVC.

1) (Switched Virtual Circuit) A network connection that is established at the time the transmission is required and disconnected when the session is completed. SVCs are normally implemented in connection-oriented systems such as the analog telephone network and ATM networks. Contrast with PVC.

2) (Scalable Video Coding) An extension to the Advanced Video Coding (AVC) standard to accommodate rendering devices with different processing capabilities and/or degraded transmission paths. SVC allows low-resolution formats to travel as subsets alongside the high-resolution video. The subsets may eliminate frames or contain reduced frame sizes or both. Rather than display high-resolution video poorly, SVC enables lesser-quality video to flow smoothly on low-bandwidth devices and channels.

3) (SuperVisor Call) A mainframe instruction that passes control to the operating system.

Wrong answer.

ISR. (interrupt service routine) is the interrupt handler which is the right answer and is not present so the answer is none of these.

The ISR code performs the necessary actions to handle the interrupt.

ISR is stored in memory (M)

All the sections reside in memory. So, saying that 'M' means memory (which is the right answer) is illogical. I guess admins should change the answer to 'ISR', which is currently not in option.

When an interrupt occurred the control is first transferred to an interrupt handler.

M : Memory location / memory pointer,

SVC : Supervisor Call,

IP : Instruction pointer,

MDR: Memory data register.

Please give me the accurate meaning of M.

M is the memory.