Chapter 15 JAVA

Question 1

Which of the following is the most general form of printf()

A. printf(locale, formatString, value1, value2, value3, …)

B. printf(locale, formatString )

C. printf( value1, value2, value3, …)

D. printf( format1, format2, format3, …)

Answer 1

A. printf(locale, formatString, value1, value2, value3, …)

Question 2

What does the following print?

double value= -486.1234;
System.out.printf(“value=%8.2f%n”, value);

(The small dots ….in some answers show where spaces are printed.)
A.

value=-486.1234
B.

value= -486.12
C.

value= -486.12n
D.

value=….-486.12

Answer 2

B.

value= -486.12

Question 3

What does the following print?

double value= 486.1999;
System.out.printf(“value=%10.1f%n”, value);

A.

value=……486.1
B.

value=….486.1999
C.

value=…..486.2
D.

value=486.12

Answer 3

C.

value=…..486.2

Question 4

What does the following print?

int sum = 3487;
System.out.printf(“sum=%10d%n”, sum);

A.

sum=……3487
B.

sum= 3487
C.

sum=……….3487
D.

sum=3487.0

Answer 4

A.

sum=……3487

Question 5

What does the following print?

int sum = 3487;
System.out.printf(“sum=%010d%n”, sum);

A.

sum=0000003487
B.

sum=03487
C.

sum=00000000003487
D.

sum=03487

Answer 5

A.

sum=0000003487

Question 6

What does the following print?

int sum = 3487174;
System.out.printf(“sum=%3d%n”, sum);

A.

sum=348
B.

sum=174
C.

sum=3487174
D. An Exception will halt the program.

Answer 6

C.

sum=3487174

Question 7

What does the following print?

int sum = 10034;
System.out.printf(“sum=%8.2f%n”, sum);

A.

sum=10034.00
B.

sum=…10034
C.

sum=00010034
D. An Exception will halt the program.

Answer 7

D. An Exception will halt the program.

Question 8

What does the following print?

int balance=987654321;
System.out.printf(Locale.US, “balance:%,12d%n”, balance);

A.

balance: 987654321
B.

balance: 987 654 321
C.

balance: 987,654,321
D.

balance:…987,654,321

Answer 8

C.

balance: 987,654,321

Question 9

. What does the following print?

String coins=”dimes”; int number=19 ;
double unitValue=0.10;
System.out.printf( “You have %d %s worth %5.2f dollars%n”, number, coins, number*unitValue );

A.

You have 19 dimes worth..1.90 dollars
B.

You have19dimes worth1.90dollars
C.

You have…19…dimes worth….1.90 dollars
D.

You have 19….dimes….worth 1.9 dollars

Answer 9

A.

You have 19 dimes worth..1.90 dollars

Question 10

What does the following print?

System.out.printf( “|%-10s%10s|%n”, “Hello”, “World” );

A.

|HelloWorld|
B.

|Hello…..World…..|
C.

|Hello……….World|
D.

Hello World |

Answer 10

C.

|Hello……….World|