java MCQ

Print the output of following code snippet.

{

  int p= 5000;

  int q=2000;

while(-- p < ++ q);

System.out.println(p);

}

• a) 4999

• 5000

• 4989

• 4888

 public class XYZ

{

  public static void main(String[] args)

{

  short x = 50, Y;

  Y = x * 100;

  System.out.print(y);

  }

}

• 1

• Run time error

• 5000

• Compile time error

public class XYZ

 {

  public static void main(String[] args) {

  String str = "GLBAJAJ";

  str = "GLBIAN";

  System.out.println(str);

  }

}

• "GLBAJAJ"

• GLBIAN

• GLBIAN"

• GLBIAN

 public class XYZ {

  public static void main(String arg[]) {

  int i;

  for (i = 1; i <= 12; i += 2) {

  if (i == 8) {

  System.out.println(i);

  break;

  }

  }

  }

}

• A. No output

• 2

• 23232

• 121

What is the purpose of the instanceof operator?

• Check if an object is an instance of a specific class or interface

• Compare two object references

• Check if an object is an instance of a specific class or interface

• Multiply instances

 Print the output of following code snippet.

{

  int p= 5000;

  int q=2000;

while(-- p < ++ q)

System.out.println(p);

}

• a) No any output

• a) Compile time error

• a) Run time error

• 0

Which method in java is used to generate random numbers in Java?

• random.nextInt()

• random()

• rand()

• All of these

How can we access methods for file handling in java?

• Java.FileHandling

• Java.io.File

• Java.files

• J

  Java.io

What will be the output of the following code?

public class Test {

public static void main(String[] args) {

int a = 5;

int b = 10;

int result = a++ + --b * a;

System.out.println(result);

}

}

• 54

• 50

• 45

• 55

What will be the output of the following code?

public class Test {

public static void main(String[] args) {

String str1 = "Hello";

String str2 = new String("Hello");

if (str1 == str2) {

System.out.println("Equal");

} else {

System.out.println("Not Equal");

}

}

}

• Compilation error

• Runtime error

• Not Equal

• Equal