Free Sun Certified Java Programmer Questions and Answers

Which of the following are keywords used in Java?

Please select 2 correct answers

boolean

Integer

super

array

Correct! Wrong!

Both keywords are an integral part of the Java programming language and have specific meanings and functionalities within the language

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

Please select 2 correct answers

String s[] = "Hello Java";

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

String s = "Hello Java";

new String s = "Hello Java";

Correct! Wrong!

Both statements String s = "Hello Java"; and String s = new String("Hello Java"); assign the string value "Hello Java" to the String variable s.

What identifiers are valid?

r2d2

bBb$

_xpoints

all of the above

Correct! Wrong!

"_xpoints", "r2d2", and "bBb$" - are valid in Java.
Java allows a combination of letters (both uppercase and lowercase), digits, and underscores to form valid identifiers. However, an identifier must begin with a letter (uppercase or lowercase), underscore, or a currency character (such as '$'). It cannot start with a digit.

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

int a = new int[5,5];

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

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

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

Correct! Wrong!

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?

Please select 2 correct answers

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

double[] snow = new double[31];

double snow[] = new double[31];

double snow[31] = new array;

Correct! Wrong!

Both declarations double snow[] = new double[31]; and double[] snow = new double[31]; are valid and would create an array of 31 floating-point numbers representing snowfall for each day of March in Gnome, Alaska.

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

public static void main( String args );

public static void main();

public static void main( Graphics g );

public static void main( String args[] );

Correct! Wrong!

Both of these definitions are acceptable, and the choice between them depends on your personal preference or the coding standards of the project you are working on.

Which of the following is true:

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

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

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

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

Correct! Wrong!

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

FREE Sun Certified Java Programmer Questions and Answers

Which of the following are keywords used in Java?

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

What identifiers are valid?

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

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?

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

Which of the following is true:

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