E5-OOPJ

var-args means?

• variable number of arguments

• variety number of arguments

• velocity of arguments

• volume of arguments

The purpose of var-args is to

• increase length of the code

• reduce the readability.

• reduce the length of the code

• increase number of methods

syntax for declaration of var-args method m1()

• m1(int, ... x)

• m1(int... x)

• m1(int...., x)

• m1(int x)

class Test{

static void m1(int... x){

System.out.println("Java Lab");

}

public static void main(String[] args){

m1( );

m1(10);

m1(10,20);

m1(10,20,20);

}

}

What is the output of the program?

• java lab

• 10,20

• 10,20,30

• java lab

  java lab

  java lab

  java lab

class Test{

static void sum(int... x){

int total=0;

for(int x1:x){

total=total+x1;

}

System.out.println(" "+total);

}

public static void main(String[] args){

sum( );

sum(10);

sum(10,20);

sum(10,20,30);

}

}

What is the output of the program?

• 0

• 0

  10

  30

  60

• 30

  60

• 60

static modifier/keyword is applicable for

• only variables

• only variables and methods

• only methods and all classes

• variables

  methods

  and nested classes

If we want to create a separate copy for every object, we should go for

• instance variable

• static variable

• object variable

• int variable

if you want to create common copy for all objects, we go for

• instance variable

• static variable

• int variable

• double variable

class Student{

String name;

int rollno;

static string clzname;

getStudentinfo(){

System.out.println(" "+name);

}

getCollegeinfo(){

System.out.println(" "+clzname);

}

}, which is/are the static method?

• Student

• getStudentinfo()

• getCollegeinfo()

• clzname

static class concepts is applicable only for

• Outer class

• Inner class

• Top Level class

• class with main