JAVA Programming QUIZ - 1

Identify the invalid constant declaration:

• final int strength = 100;

• final intpass_mark = 50;

• final int max value = 50

• final float P1 = 3.14159;

In java characters are compared based on their _______ values.

• Bytecode

• Unicode

• Ascii code

• Assembly code

Find the output of the following code:

public class Main {

public static void main(String[] args) {

String[] fruits = {"Apple","Mango","orange","Grapes"};

fruits[1] ="pineapple";

System.out.println(fruits[1]);

}

}

• Apple

• Mango

• orange

• pineapple

Find the output of the following code:

public class Main {

public static void main(String[] args) {

int[][] myNumbers = { {1, 2, 3, 4}, {5, 6, 7} };

int x = myNumbers[1][2];

System.out.println(x);

}

}

• 1

• 2

• 5

• 7

public class Main {

public static void main(String[] args) {

System.out.println(Math.abs(-9.7));

}

}

• -9.7

• 9,7

• . 9

• error

Which of these operators can be used to concatenate two or more String objects?

• +

• +=

• &

• ||

Output of the progrm

classMain {

public static void main(String args[]) {

int x = 0;

int y = 10;

int z = y/x;

}

}

• Compiler error

• Compiles and Run file

• Compiles fine but throws arithmetic exception.

• None

Which of these is a super class of all errors and exceptions in the Java language?

• Runtime Exception

• Throwable

• Catchable

• None

The backslash character constant “\t” represents ________

• form feed

• newline

• horizontal tab

• backslash

Find the output of the following code:

String firstName = "hello"

String lastName = "John"

System.out.println(firstName +lastName);

• Hello + John

• Hello+John

• Hello

• Hello John