Java Programming Test 5

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What is the output of this program?

class string_demo {

public static void main(String args[])

{

String obj = “I” + “like” + “Java”;

System.out.println(obj);

}

}

.

What is the output of this program?

class string_class {

public static void main(String args[])

{

String obj = “I LIKE JAVA”;

System.out.println(obj.charAt(3));

}

}

.

What is the output of this program?

class string_class {

public static void main(String args[])

{

String obj = “I LIKE JAVA”;

System.out.println(obj.length());

}

}

.

What is the output of this program?

class string_class {

public static void main(String args[])

{

String obj = “hello”;

String obj1 = “world”;

String obj2 = obj;

obj2 = ” world”;

System.out.println(obj + ” ” + obj2);

}

}

.

What is the output of this program?

class string_class {

public static void main(String args[])

{

String obj = “hello”;

String obj1 = “world”;

String obj2 = “hello”;

System.out.println(obj.equals(obj1) + ” ” + obj.equals(obj2));

}

}

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What is the return type of Constructors?

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Which keyword is used by method to refer to the object that invoked it?

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Which of the following is a method having same name as that of its class?

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Which operator is used by Java run time implementations to free the memory of an object when it is no longer needed?

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Which function is used to perform some action when the object is to be destroyed?

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Which of the folowing stements are incorrect?

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Arrays in Java are implemented as?

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Which of these keywords is used to prevent content of a variable from being modified?

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Which of these cannot be declared static?

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Which of the following statements are incorrect?

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Which of the following statements are incorrect?

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Which of these methods must be made static?

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Which of these is method of ObjectOutput interface used to write the object to input or output stream as required?

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Which of these process occur automatically by java run time system?

.

What is the output of this program?

class Output {

public static void main(String args[])

{

int arr[] = {1, 2, 3, 4, 5};

for ( int i = 0; i < arr.length – 2; ++i)

System.out.println(arr[i]);

}

}