Array of Structures 2

Which of the following declares an array of structures of size 5, where each structure holds two integers (x and y)?

• struct point arr[5];

• struct point arr[] = {x: 1, y: 2};

• struct point {int x; int y;} arr[5];

• struct point arr = {1, 2};

What is the correct way to access the second element’s x field of an array of structures called points?

• points[1].x;

• points[0].x;

• points.x[1];

• points.x[2];

Given a pointer p to an array of structures, which statement accesses the third element's y field?

• p[2].y;

• (*p[2]).y;

• (*p).y[2];

• p->y[2];

Which of the following code snippets correctly traverses an array of structures points of size 5 and prints all the x values?

• for (int i = 0; i arr[0] = 10;

• for (int i = 0; i < 5; i++) printf("%d", points[i].x);

• for (int i = 0; i < 5; i++) printf("%d", arr[i].x);

• struct data {int arr[5];} *d; d.arr[0] = 10;

What is the correct way to access the y value of the second point using a pointer to the array?

• points[1].y;

• points->y;

• points[2].y;

• points[1]->y;

What is the correct way to calculate the size of an array of structures arr containing 10 elements of type struct point?

• sizeof(arr);

• sizeof(arr) / sizeof(struct point);

• sizeof(struct point) / sizeof(arr);

• sizeof(arr) / sizeof(struct point*);

Which of the following accesses the field y in the nested structure inner_var?

• outer.inner_var.y;

• outer.inner_var->y;

• outer->inner_var.y;

• outer.inner_var[1].y;

What is the correct code to dynamically allocate memory for an array of 10 structures of type struct point?

• struct point *arr = malloc(sizeof(struct point) * 10);

• struct point arr = malloc(10 * sizeof(struct point));

• struct point arr[10] = malloc(sizeof(struct point));

• malloc(sizeof(struct point) * 10);

How can you access the member val of a structure data using a pointer p?

• p.val;

• (*p).val;

• p->val;

• (*p).val;

Which of the following initializes an array of 3 struct mixed elements correctly?

• struct mixed arr[3] = {{1, 1.1, 'a'}, {2, 2.2, 'b'}, {3, 3.3, 'c'}};

• struct mixed arr[3] = {1, 2.2, 'a', 2, 3.3, 'b'};

• struct mixed arr[3] = {{1, 1.1}, {2, 2.2}, {3, 3.3}};

• struct mixed arr[3] = {1, 2, 3};