Quiz on printf()

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, ...)

Correct Answer:

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

Correct Answer:

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

Correct Answer:

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

Correct Answer:

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

Correct Answer:

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.

Correct Answer:

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.

Correct Answer:

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

Correct Answer:

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

Correct Answer:

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 |

Correct Answer:

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