Chapter 3

[Skip Breadcrumb Navigation]

Home

Student Resources

Chapter Quizzes

Chapter 3

Flow of Control

This activity contains 15 questions.

After this fragment executes, what is the value of num?

int num = 17;
switch (--num) {
	case 14:  num = num - 4;
	case 15:  num = num - 6;
	case 16:  num = num - 8;
	case 17:  num = num - 10;
}

178-27

An assertion check statement:

Requires a Boolean expression
Can be used anywhere a normal statement can
Terminates the program if the Boolean expression evaluates to true
Is used to say something (to assert) about the state of a program

Statements (a), (c), and (d) are true; (b) is falseStatements (a), (b), and (d) are true; (c) is falseStatements (b), (c), and (d) are true; (a) is falseAll four statements are true

Consider these three fragments:

// Fragment One
final int LIMITx = 16;
int sumx = 0;
for (int cntx = 1; cntx < LIMITx; cntx *= 2)
	sumx += cntx;
System.out.println("sum = " + sumx);

// Fragment Two
final int LIMITz = 16;
int sumz = 0;
int cntz = 1;
while (cntz < LIMITz) {
	sumz += cntz;
	cntz *= 2;
}
System.out.println("sum = " + sumz);

// Fragment Three
final int LIMITy = 16;
int sumy = 0;
int cnty = 1;
do {
	sumy += cnty;
	cnty *= 2;
} while (cnty < LIMITy);
System.out.println("sum = " + sumy);

Fragments One and Three produce the same output, but Fragment Two produces different output.All three Fragments produce identical outputs.All three Fragments produce slightly different outputs.Fragments One and Two produce the same output, but Fragment Three produces different output.

If you forget to place a break in a switch statement, what happens?

The compiler reports a warningThe flow of control causes the next statement to execute, just like is usually the caseThe compiler reports an errorThe flow of control causes the switch statement to exit immediately

The break and continue statements:

can be used within any kind of loop -- while, do-while, and for
are controversial and should be avoided if possible
are unnecessary -- any program written using break or continue within a loop can be rewritten not using break and continue
just as break also can be used within a switch statement, so can continue -- with a similar effect

All four statements are trueStatements (a), (b), and (d) are trueStatements (b), (c), and (d) are trueStatements (a), (b), and (c) are true

The difference between "short-circuit" and "complete" evaluation is:

Short-circuit evaluation only can be applied to arithmetic expressions; complete evaluation is more generalThere is no difference in Java; they're the sameShort-circuit evaluation terminates as soon as a (Boolean) value is determined; complete evaluation always evaluates all subexpressionsShort-circuit evaluation proceeds from right-to-left, while complete evaluation proceeds from left-to-right

This fragment:

if (alpha >= beta)
    charlie = delta;
else
    epsilon = foxtrot;

is equivalent to which of the following?

if (beta <= alpha)
    charlie = delta;
else if (beta > alpha)
    epsilon = foxtrot;

if (alpha >= beta);
    charlie = delta;
if (alpha < beta);
    epsilon = foxtrot;

if (beta < alpha)
    charlie = delta;
else
    epsilon = foxtrot;

if (beta >= alpha)
    charlie = delta;
else
    epsilon = foxtrot;

What are the final values of a and b?

int a = 2, b = 7;
b -= a + 4;
a *= b - a;

a= -1, b= 1a= 8, b= 6a= 4, b= 6a= -2, b= 1

What are the final values of a, b, and c?

int  a = 4, b = 9, c = -3;
if (a >= b)
    if (c < b)
        a = b + c;
    else
        c = a -- c;
else if (c < a)
    b = c -- b;

a= 4, b= 9, c= -3a= 6, b= 9, c= -3a= 4, b= -12, c= -3a= 4, b= 9, c= 7

What are the final values of a, b, and c?

int a = 4, b = -9, c = 7;
if (a > b && b > c)
	if (b < a)
		b = -b;
	else
		a = -a;
else if (a > b || b > c)
	if (a < c)
		c = -c;
	else if (! (c > b))
	b = -a;

a= 4, b= -4, c= 7a= 4, b= 9, c= 7a= 4, b= -9, c= 7a= 4, b= -9, c= -7

What does this fragment print?

int result = 9;
for (int cnt = 2; cnt < result; cnt += 3)
    result = cnt;
System.out.println("result = " + result);

result = 2result = 11result = 9result = 8

What is printed?

int num = 12345678;
int result = 0;
do {
	result = 10 * result + num % 10;
	num /= 100;
} while (num > 0);
System.out.println(result);

876543211234567808642

What is printed?

int result = 2;
int cnt = 5;
for (cnt = 0; cnt < 5; cnt++);
	result += cnt;
System.out.println("result = " + result);

result = 17result = 12result = 7result = 5

What is the difference between lexicographic and alphabetic ordering?

Lexicographic ordering puts things into decreasing (Z to A) order, while alphabetic ordering puts things into increasing (A to Z) orderThey're two terms that mean the same thingAlphabetic ordering is based upon ASCII; lexicographic ordering is based only on the letters of the alphabetLexicographic ordering is based upon ASCII; alphabetic ordering is based only on the letters of the alphabet

What sequence of ints is printed?

final int LIMIT = 10;
int cnt = 2;
while (cnt < LIMIT) {
	System.out.print(" " + cnt);
	cnt += cnt;
}
System.out.println();

2 4 8 164 8 162 4 82 4 6 8

The Submit Answers for Grading feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off.

So, the Submit Answers for Grading button below will not work.

The following Submit Answers for Grading button is provided in its place and will clear your answers:
The Clear Answers and Start Over feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off.

So, the Clear Answers and Start Over button below will not work.

The following Clear Answers button is provided in its place and will clear your answers:

Your browser either does not support scripting or you have turned scripting off. Because of this, the answer choices will NOT appear in a different order each time the page is loaded, though that is mentioned below. Note that you do not need this feature to use this site.

Answer choices in this exercise appear in a different order each time the page is loaded.

Chapter 3

After this fragment executes, what is the value of num?
int num = 17; switch (--num) { case 14: num = num - 4; case 15: num = num - 6; case 16: num = num - 8; case 17: num = num - 10; }

An assertion check statement:

Requires a Boolean expression
Can be used anywhere a normal statement can
Terminates the program if the Boolean expression evaluates to true
Is used to say something (to assert) about the state of a program

If you forget to place a break in a switch statement, what happens?

The difference between "short-circuit" and "complete" evaluation is:

This fragment:
if (alpha >= beta) charlie = delta; else epsilon = foxtrot;

is equivalent to which of the following?

What are the final values of a and b?
int a = 2, b = 7; b -= a + 4; a *= b - a;

What are the final values of a, b, and c?
int a = 4, b = 9, c = -3; if (a >= b) if (c < b) a = b + c; else c = a -- c; else if (c < a) b = c -- b;

What are the final values of a, b, and c?
int a = 4, b = -9, c = 7; if (a > b && b > c) if (b < a) b = -b; else a = -a; else if (a > b || b > c) if (a < c) c = -c; else if (! (c > b)) b = -a;

What does this fragment print?
int result = 9; for (int cnt = 2; cnt < result; cnt += 3) result = cnt; System.out.println("result = " + result);

What is printed?
int num = 12345678; int result = 0; do { result = 10 * result + num % 10; num /= 100; } while (num > 0); System.out.println(result);

What is printed?
int result = 2; int cnt = 5; for (cnt = 0; cnt < 5; cnt++); result += cnt; System.out.println("result = " + result);

What is the difference between lexicographic and alphabetic ordering?

What sequence of ints is printed?
final int LIMIT = 10; int cnt = 2; while (cnt < LIMIT) { System.out.print(" " + cnt); cnt += cnt; } System.out.println();

Chapter 3

After this fragment executes, what is the value of num? int num = 17; switch (--num) { case 14: num = num - 4; case 15: num = num - 6; case 16: num = num - 8; case 17: num = num - 10; }

An assertion check statement: Requires a Boolean expression Can be used anywhere a normal statement can Terminates the program if the Boolean expression evaluates to true Is used to say something (to assert) about the state of a program

If you forget to place a break in a switch statement, what happens?

The difference between "short-circuit" and "complete" evaluation is:

This fragment: if (alpha >= beta) charlie = delta; else epsilon = foxtrot; is equivalent to which of the following?

What are the final values of a and b? int a = 2, b = 7; b -= a + 4; a *= b - a;

What are the final values of a, b, and c? int a = 4, b = 9, c = -3; if (a >= b) if (c < b) a = b + c; else c = a -- c; else if (c < a) b = c -- b;

What are the final values of a, b, and c? int a = 4, b = -9, c = 7; if (a > b && b > c) if (b < a) b = -b; else a = -a; else if (a > b || b > c) if (a < c) c = -c; else if (! (c > b)) b = -a;

What does this fragment print? int result = 9; for (int cnt = 2; cnt < result; cnt += 3) result = cnt; System.out.println("result = " + result);

What is printed? int num = 12345678; int result = 0; do { result = 10 * result + num % 10; num /= 100; } while (num > 0); System.out.println(result);

What is printed? int result = 2; int cnt = 5; for (cnt = 0; cnt < 5; cnt++); result += cnt; System.out.println("result = " + result);

What is the difference between lexicographic and alphabetic ordering?

What sequence of ints is printed? final int LIMIT = 10; int cnt = 2; while (cnt < LIMIT) { System.out.print(" " + cnt); cnt += cnt; } System.out.println();

After this fragment executes, what is the value of num?
int num = 17; switch (--num) { case 14: num = num - 4; case 15: num = num - 6; case 16: num = num - 8; case 17: num = num - 10; }

An assertion check statement:

Requires a Boolean expression
Can be used anywhere a normal statement can
Terminates the program if the Boolean expression evaluates to true
Is used to say something (to assert) about the state of a program

This fragment:
if (alpha >= beta) charlie = delta; else epsilon = foxtrot;

is equivalent to which of the following?

What are the final values of a and b?
int a = 2, b = 7; b -= a + 4; a *= b - a;

What are the final values of a, b, and c?
int a = 4, b = 9, c = -3; if (a >= b) if (c < b) a = b + c; else c = a -- c; else if (c < a) b = c -- b;

What are the final values of a, b, and c?
int a = 4, b = -9, c = 7; if (a > b && b > c) if (b < a) b = -b; else a = -a; else if (a > b || b > c) if (a < c) c = -c; else if (! (c > b)) b = -a;

What does this fragment print?
int result = 9; for (int cnt = 2; cnt < result; cnt += 3) result = cnt; System.out.println("result = " + result);

What is printed?
int num = 12345678; int result = 0; do { result = 10 * result + num % 10; num /= 100; } while (num > 0); System.out.println(result);

What is printed?
int result = 2; int cnt = 5; for (cnt = 0; cnt < 5; cnt++); result += cnt; System.out.println("result = " + result);

What sequence of ints is printed?
final int LIMIT = 10; int cnt = 2; while (cnt < LIMIT) { System.out.print(" " + cnt); cnt += cnt; } System.out.println();