What is volatile and extern keywords in C ? What are local and external linkages ? What are SW and HW interrupts ? What are the different scheduling algorithms ?

Question

Accepted Answer

Volatile and extern are keywords in C for memory management. Local and external linkages determine scope. SW and HW interrupts handle events. Different scheduling algorithms manage task priorities.

Volatile keyword is used to indicate that a variable may be changed unexpectedly, typically by hardware. Example: volatile int x;
Extern keyword is used to declare a variable that is defined in another file. Example: extern int y;
Local linkage restricts the scope of a variable to the current function. External linkage allows access from other files. Example: static int z; vs. extern int w;
Software interrupts are generated by software to request a service from the operating system. Hardware interrupts are generated by hardware devices to signal events. Example: keyboard interrupt vs. timer interrupt.
Different scheduling algorithms include FCFS, SJF, Round Robin, Priority Scheduling, etc. Each algorithm has its own way of managing task priorities and execution order.

What is volatile and extern keywords in C ? What are local and external linkages ? What are SW and HW interrupts ? What are the different scheduling algorithms ?

Top MediaTek India Technology Senior Systems Engineer interview questions & answers

Popular interview questions of Senior Systems Engineer