Free Sun Certified Java Programmer Questions and Answers

Question 1

Which of the following accurately describes the main() method of an application?

Accepted Answer

public static void main( String args[] );

Answer

public static void main( String args );

Answer

public static void main();

Answer

public static void main( Graphics g );

Question 2

Which of the following are keywords used in Java?

Accepted Answer

boolean

Answer

Integer

Answer

array

Question 3

What identifiers are valid?

Accepted Answer

all of the above

Answer

r2d2

Answer

bBb$

Answer

_xpoints

Question 4

The String variable s has "Hello Java" assigned to it in which of the following statements?

Accepted Answer

String s = new String("Hello Java");

Answer

String s[] = "Hello Java";

Answer

new String s = "Hello Java";

Question 5

Which of the following is true:

Accepted Answer

>> performs signed shift while >>> performs an unsigned shift.

Answer

>>> performs a signed shift while >> performs an unsigned shift.

Answer

<<< performs a signed shift while << performs an unsigned shift.

Answer

<< performs a signed shift while <<< performs an insigned shift.

Question 6

Which declarations would be acceptable if we wanted to represent the snowfall in Gnome, Alaska, for each day of March as an array of 31 floating point numbers?

Accepted Answer

double[] snow = new double[31];

Answer

double snow[31] = new array[31];

Answer

double snow[31] = new array;

Question 7

Which of the following statements about a two-dimensional array of numbers is legal?

Accepted Answer

int[]a[] = new int[5][5];

Answer

int a = new int[5,5];

Answer

int[][]a = new[5]int[5];

Answer

int[5][5]a = new int[][];