Chapter 5

What is sum after the following loop terminates? int sum = 0; int item = 0; do { item++; sum += item; if (sum >= 4) continue; } while (item < 5);

a. 15

Analyze the following code. int count = 0; while (count < 100) { // Point A System.out.println("Welcome to Java!"); count++; // Point B } // Point C

a. count < 100 is always true at point A e. count < 100 is always false at point C

Do the following two statements in (I) and (II) result in the same value in sum? (I): for (int i = 0; i&lt;10; ++i) { sum += i; } (II): for (int i = 0; i&lt;10; i++) { sum += i; }

a. yes

Is the following loop correct? for(; ;);

a. yes

Will the following program terminate? int balance = 10; while (true) { if (balance &lt; 9) break; balance = balance - 9; }

a. yes

The following loop displays _______________. for (int i = 1; i <= 10; i++) { System.out.print(i + " "); i++; }

d. 1 3 5 7 9

How many times is the println statement executed? for (int i = 0; i < 10; i++) for (int j = 0; j < i; j++) System.out.println(i * j)

d. 45

What is the printout after the following loop terminates? int number = 25; int i; boolean isPrime = true; for (i = 2; i < number && isPrime; i++) { if (number % i == 0) { isPrime = false; } } System.out.println("i is " + i + " isPrime is " + isPrime);

d. i is 6 isPrime is false

What is i after the following for loop? int y = 0; for (int i = 0; i&lt;10; ++i) { y += i; }

d. undefined

What is the output for y? int y = 0; for (int i = 0; i&lt;10; ++i) { y += i; } System.out.println(y);

e. 45

Analyze the following fragment: double sum = 0; double d = 0; while (d != 10.0) { d += 0.1; sum += sum + d; }

c. the program may not stop because of the phenomenon referred to as numerical inaccuracy for operating with floating-point numbers.

What is sum after the following loop terminates? int sum = 0; int item = 0; do { item++; sum += item; if (sum &gt; 4) break; } while (item &lt; 5);

b. 6

What is the printout after the following loop terminates? int number = 25; int i; boolean isPrime = true; for (i = 2; i < number; i++) { if (number % i == 0) { isPrime = false; break; } } System.out.println("i is " + i + " isPrime is " + isPrime);

b. i is 5 isPrime is false

What is the number of iterations in the following loop: for (int i = 1; i <= n; i++) { // iteration }

b. n

What is the number of iterations in the following loop: for (int i = 1; i < n; i++) { // iteration }

b. n - 1

Will the following program terminate? int balance = 10; while (true) { if (balance &lt; 9) continue; balance = balance - 9; }

b. no

How many times will the following code print "Welcome to Java"? int count = 0; while (count++ < 10) { System.out.println("Welcome to Java"); }

c. 10

How many times will the following code print "Welcome to Java"? int count = 0; do { System.out.println("Welcome to Java"); count++; } while (count < 10);

c. 10

How many times will the following code print "Welcome to Java"? int count = 0; do { System.out.println("Welcome to Java"); } while (++count < 10);

c. 10

How many times will the following code print "Welcome to Java"? int count = 0; while (count < 10) { System.out.println("Welcome to Java"); count++; }

c. 10

What is the value in count after the following loop is executed? int count = 0; do { System.out.println("Welcome to Java"); } while (count++ < 9); System.out.println(count);

c. 10