JAVA Exam Set -1

Which of the following are legal lines of Java code?

1. int w = (int)888.8;
2. byte x = (byte)100L;
3. long y = (byte)100;
4. byte z = (byte)100L;

What is the order of variables in Enum?

The default value of a static integer variable of a class in Java is?

 Which statement is not true in the java language?

Which of these is an incorrect array declaration?

What will be the output of the following Java code?

class array_output

{

public static void main(String args[])

{

char array_variable [] = new char[10];

for (int i = 0; i < 10; ++i)

{

array_variable[i] = ‘i’;

System.out.print(array_variable[i] + “”);

}

}

}

What will be the output of the following Java program?

class Output

{

public static void main(String args[])

{

final int a=10,b=20;

while(a<b)

{

System.out.println(“Hello”);

}

System.out.println(“World”);

}

}

From where break statement causes an exit?

In the following Java code, which call to sum() method isappropriate?

class Output

{
public static int sum(int …x)
{
return;
}

static void main(String args[])

{

sum(10);

sum(10,20);

sum(10,20,30);

sum(10,20,30,40);

}

}

What will be the output of the following Java program?

class String_demo

{

public static void main(String args[])

{

char chars[] = {‘a’, ‘b’, ‘c’};

String s = new String(chars);

System.out.println(s);

}

}

Consider the two methods (within the same class)

public static int foo(int a, String s)
{
s = “Yellow”;
a=a+2;
return a;
}
public static void bar()
{
int a=3;
String s = “Blue”;
a = foo(a,s);
System.out.println(“a=”+a+” s=”+s);
}
public static void main(String args[])
{
bar();
}
What is printed on execution of these methods?

Consider the following class definition:

public class MyClass
{
private int value;
public void setValue(int i){ / code / }
// Other methods…
}

The method setValue assigns the value of i to the instance field value. What could you write for the implementation of setValue?

class IfStatement{
public static void main(String args[])
{
int a=2, b=3;
if (a==3)
if (b==3)
System.out.println(“===============”);
else
System.out.println(“#################”);
System.out.println(“&&&&&&&&&&&”);
}
}

Which of the following will the output be?

How is Date stored in database?

What does LocalTime represent?

What will be the output of the following Java program?

class exception_handling

{

public static void main(String args[])

{

try

{

System.out.print(“Hello” + ” ” + 1 / 0);

}

catch(ArithmeticException e)

{

System.out.print(“World”);

}

}

}

What will be the output of the following Java code?

class output

{

public static void main(String args[])

{

String a = “hello i love java”;

System.out.println(a.indexOf(‘i’)+” “+a.indexOf(‘o’) +” “+a.lastIndexOf(‘i’)+” “+a.lastIndexOf(‘o’));

}

}

What will be the output of the following Java code?

class output

{

public static void main(String args[])

{

char c[]={‘a’, ‘1’, ‘b’ ,’ ‘ ,’A’ , ‘0’};

for (int i = 0; i < 5; ++i)

{

if(Character.isDigit(c[i]))

System.out.println(c[i]+” is a digit”);

if(Character.isWhitespace(c[i]))

System.out.println(c[i]+” is a Whitespace character”);

if(Character.isUpperCase(c[i]))

System.out.println(c[i]+” is an Upper case Letter”);

if(Character.isLowerCase(c[i]))

System.out.println(c[i]+” is a lower case Letter”);

i=i+3;

}

}

}

What will be the output of the following Java code?

class output

{

public static void main(String args[])

{

char ch;

ch = “hello”.charAt(1);

System.out.println(ch);

}

}

A protected member can be accessed in,

Which is the false option?