Question

1. (a) Before entering any while loop, the while loop condition is. . . A. true B. false C. true or false

(b) At the beginning of each iteration, a while loop condition is. . . A. true B. false C. true or false

(c) When the loop terminates, a while loop condition is. . . A. true B. false C. true or false

(d) Which of the following statements will not cause a compile-time error? A. byte b = 1543; B. int n = (int) "Hi there"; C. int i = 34.13; D. long k = (int) 92.12;

(e) The first statement in a for-loop header is performed. . . A. at the beginning of each iteration. B. at the end of each iteration. C. only once, just before entering the loop. D. only once, just before exiting the loop.

(f) Overflow is... A. When attempting to store a value in a variable of the wrong type. B. When an else block is not aligned with the corresponding if block. C. When a switch statement passes from one case to the next, because there is no break keyword. D. When integer arithmetic causes an integer variable with a large positive value to wrap around to an equally large negative value (or vice versa).

Answer 1

a) Before entering any while loop, the loop condition could be true or false and based its value only compiler decides whether to go inside loop or not.

b) At beginning of each iteration, the condition of each iteration is true.

c) When loop terminates loop condition is false, that's why the loop terminated.

d) long k = (int) 92.12 doesn't create compile time error as here we are converting 92.12 to int and trying to store in long which is up casting and long can store an int.

Other three will result in compile time error, like

e) Its executed at the beginning of each iteration.

f) Overflow is when integer arithmetic causes an integer variable with a large positive value to wrap around to an equally large negative value (or vice versa)