ESSERE / AVERE. Which verb do you need to complete these par…

ESSERE / AVERE. Which verb do you need to complete these paragraphs, essere or avere? Choose the correct verb and then conjugate it in the present tense. These are the present tense conjugations of ESSERE and AVERE: sono, sei, è, siamo, siete, sono ho, hai, ha, abbiamo, avete, hanno

Single answer: xchgl is a x86 machine instruction that reads…

Single answer: xchgl is a x86 machine instruction that reads a 32bit value from a memory location and sets a new value to the same memory location as a single atomic instruction. The following xchg is the mutual exclusion (mutex) implemented in xv6 os kernel using a xchgl x86 instruction. For your understanding, the machine effects are described in C.   static inline int xchg(volatile int *addr, int newval) { uint result; /* atomic read followed by update in a C version */ result = *addr; *addr = new; return result;} Select one that *CORRECTLY* implements a mutual lock to enter a critical section (mutual exclusion) using the xchg above.