What is the field of quotients (or field of fractions) of an integral domain D?
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In the following equation, which element is reduced? MnO2 …
In the following equation, which element is reduced? MnO2 + + HCl –> H2O + MnCl2 + Cl2
In the following equation, which element is neither oxidized…
In the following equation, which element is neither oxidized nor reduced? Al + Fe2O3 —> Al2O3 + Fe
In the following equation, which element is oxidized? Ba + …
In the following equation, which element is oxidized? Ba + O2 –> BaO
Single answer: What would be the output at LINE C and LINE P…
Single answer: What would be the output at LINE C and LINE P when the program below executes? #include #include int value = 0;void *runner(void *param) { value = 5; printf(“%d”,value); /* LINE C */ pthread_exit(0);}int main(int argc, char *argv[]) { pid_t pid; pthread_t tid; pthread_attr_t attr; pthread_attr_init(&attr); pthread create(&tid,&attr,runner,NULL); pthread_join(tid,NULL); printf(“%d”,value); /* LINE P */}
Multiple answers: Suppose the followings while executing a p…
Multiple answers: Suppose the followings while executing a program execution on a 32bit x86 CPU computer system; %esp=0xffffcf8c %eip=0x804842b. The instruction at the memory address 0x804842b is call 0x80483dd. 0x8048430 is the next sequential instruction memory address after 0x804842b Select three statements that are *CORRECT* right after CPU fetch-and-executes the instruction “call 0x80483dd” at 0x804842b.
Single answer: A semaphore variable can be used to order the…
Single answer: A semaphore variable can be used to order the execution of two treads T1 and T2. Select one *CORRECT* answer that correctly uses the semaphore variable “synch” to produce the output “BA” regardless of the order of scheduling on T1 and T2.
Multiple answers: Select two answers that are *CORRECT* when…
Multiple answers: Select two answers that are *CORRECT* when the following program executes. You can reference pthread man page if you need. #include #include #include #define CORE 4#define MAX 8pthread_t thread[CORE];int mat_A[MAX][MAX], mat_B[MAX][MAX], sum[MAX][MAX];void* add(void* arg) { int i, j; int core = (int)arg; for (i = core * MAX / 4; i < (core + 1) * MAX / 4; i++) for (j = 0; j < MAX; j++) sum[i][j] = mat_A[i][j] + mat_B[i][j]; return NULL;}int main() { int i, j, step = 0; for (i = 0; i < MAX; i++) for (j = 0; j < MAX; j++) { mat_A[i][j] = rand() % 10; mat_B[i][j] = rand() % 10; } for (i = 0; i < CORE; i++) { pthread_create(&thread[i], NULL, &add (void*)step); step++; } for (i = 0; i < CORE; i++) pthread_join(thread[i], NULL); return 0;}
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.
According to your assignment, Sodium Polyacrylate (podcast),…
According to your assignment, Sodium Polyacrylate (podcast), what was an interesting fact?