Technical Questions

Deadlock is a situation where a group of processes are all blocked and none of them can become unblocked until one of the other becomes unblocked. The simplest deadlock is two processes each of which is waiting for a message from the other.

• Responsiveness


• Resources sharing


• Economy


• Utilization of multiprocessor architectures.

It is also called as post tested loop. It is used when it is necessary to execute the loop at least one time. Syntax:

do {
Loop body
} while (Expression);

Example:

int main(){
    int num,i=0;  
    do{
         printf("To enter press 1\n");
         printf("To exit press  2");
         scanf("%d",&num);
         ++i;
         switch(num){
             case 1:printf("You are welcome\n");break;
             default : exit(0);
         }
    }
    while(i<=10);
    return 0;
}

Output: 3 3 4 4

Stack pointer is a special purpose 16-bit register in the Microprocessor, which holds the address od the top of the stack.

Output: 1 1 1 1 1 1
For loop will execute six times.

Note: continue keyword in do-while loop bring the program its while condition (while(0)) which is always false.

1.The hardware

2.The operating system

3.The application programs

4.The users.

System calls provide the interface between a process and the operating system. System calls for modern Microsoft windows platforms are part of the win32 API, which is available for all the compilers written for Microsoft windows.