Quiz on Java keywords
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- Question 1 of 15
1. Question
Which form of an association is highly dependent on another entity?
CorrectIncorrect - Question 2 of 15
2. Question
class company {
public void method(String a )
{
return a;
}
}
class Worker {
public void method( String b )
{
return b;
}
}
class Main {
public static void main ( String args [ ] )
{
Company c = new Company();
Worker w = new Worker();
String name = c.method(“DataFlair”);
String text = w.method(“Raj”);
System.out.println(name+text);
}
}
What is the output of the program ?
CorrectIncorrect - Question 3 of 15
3. Question
class Product {
public void store ( String name )
{
String item = this.name;
}
}
class Price {
public void store ( double value )
{
double val = this.value;
}
}
class Store {
public static void main ( String args [ ] )
{
Product p1 = new Product(“Rice”);
Product p2 = new Product(‘Wheat”);
Product p3 = new Product(“Dhal”);
Price m1 = new Price(“80”);
Price m2 = new Price(“70”);
Price m3 = new Price(“50”);
System.out.println(“Product is “ + p1 + “Price is “ + m1 );
System.out.println(“Product is “ + p2 + “Price is “ + m2 );
System.out.println(“Product is “ + p3 + “Price is “ + m3 );
}
}
What is the output of the program ?
CorrectIncorrect - Question 4 of 15
4. Question
Which of the following is an unidirectional way of association ?
CorrectIncorrect - Question 5 of 15
5. Question
class Demo {
public int function ( String a )
{
String text = this.a;
}
}
class Sample {
public void function( String b )
{
String message = this.b;
}
}
class Main {
public static void main ( String args [ ] )
{
Demo d = new Demo(“DataFlair”);
Sample s = new Sample(“Webservices”);
System.out.println( d + s );
}
}
What is the output of the program ?
CorrectIncorrect - Question 6 of 15
6. Question
class Students {
String name;
long rollno;
void display ( String a , long b )
{
name = this.a;
rollno = this.b;
}
}
class Department {
String dep;
void display ( String c )
{
dep = this.c;
}
}
class college {
public static void main ( String args [ ] )
{
Student s1 = new Student(“David” , 14 );
Student s2 = new Student(“Rohit” , 55);
Student s3 = new Student(“Shikar”, 40 );
List <String,int> list = new List();
l.add(s1);
l.add(s2);
l.add(s3);
System.out.println(l.size());
}
}
What is the output of the program ?
CorrectIncorrect - Question 7 of 15
7. Question
What will happen if one entity is deleted in a composition association ?
CorrectIncorrect - Question 8 of 15
8. Question
class Student {
String name;
Student( String a )
{
name = this.a;
}
}
class Subject {
String sub;
Subject ( String b )
{
sub = this.b;
}
}
class Main {
public static void main ( String args [ ] )
{
Student obj1 = new Student(“Ravi”);
Subject s1 = new Subject(“Maths”);
Subject s2 = new Subject(“Science”);
System.out.println( obj1 + “learns “ + s1 + “and also “ + s2 );
}
}
What is the output of the program ?
CorrectIncorrect - Question 9 of 15
9. Question
class BasicSalary {
private double salary;
public void getSalary( double amount )
{
return amount;
}
public void setSalary( double amount)
{
salary = this.amount;
}
}
class Allowances {
private double pay ;
public void getPay( double allow )
{
return allow;
}
public void setPay ( double allow )
{
pay = this.allow;
}
}
class NetPay {
public static void main ( String args [ ] )
{
BasicSalary b = new Basic Salary(10000);
Allowances a = new Allowances(2000);
System.out.println(‘Net pay is “ + ( b + a ) );
}
}
What is the output of the program ?
CorrectIncorrect - Question 10 of 15
10. Question
What is the type of relation that composition associations have ?
CorrectIncorrect - Question 11 of 15
11. Question
class Employee {
String empname;
Employee( String empname )
{
return empname;
}
}
class Salary {
float salary;
Salary ( String salary )
{
return salary;
}
}
class Company {
public static void main ( String args [ ] )
{
Employee e1 = new Employee(“Kumar”);
Employee e2 = new Employee(“Thakur”);
Employee e3 = new Employee(“Singh”);
Salary s1 = new Salary(15000);
Salary s2 = new Salary(13000);
Salary s3 = new Salary(10000);
HashTable<Float , String > list = new HashTable();
list.add(e1,s1);
list.add(e2.s2);
list.add(e3,s3);
System.out.println(list);
}
}
What will be the output of the program ?
CorrectIncorrect - Question 12 of 15
12. Question
class Sample {
public void display()
{
System.out.println(“Sample class is needed”);
}
}
class Concept {
Private Sample sample;
Concept(Sample sample)
{
this.sample = sample:
}
public void display()
{
sample.display();
System.out.println(“Concept is explained”);
}
}
class Main {
public static void main ( String args [ ] )
{
Sample s = new Sample();
Concept c = new Concept();
c.display();
}
}
What is the output of the program ?
CorrectIncorrect - Question 13 of 15
13. Question
Which technique is highly employed while using associations ?
CorrectIncorrect - Question 14 of 15
14. Question
class Associations {
public void print(String a )
{
return a;
}
}
class Aggregation {
public void print(String b)
{
return b;
}
}
class Composition {
public void print( String c )
{
return c;
}
}
class Main {
public static void main ( String args [ ] )
{
Associations a1 = new Associations(“Connection between two class objects”);
Aggregations a2 = new Aggregations(“Is-A relationship association”);
Composition a3 = new Composition (“Has-A relationship association”);
a2.print();
}
}
What is the output of the program ?
CorrectIncorrect - Question 15 of 15
15. Question
class Vegetables {
public void veg ( String vegetable )
{
return vegetable;
}
}
class Fruits {
public void fru ( String fruit )
{
return fruit;
}
}
class Consumable {
public static void main ( String args [ ] )
{
Vegetables v1 = new Vegetables(“Tomato”);
Vegetable v2 = new Vegetables(“Beetroot”);
Vegetable v3 = new Vegetables(“Potato”):
Fruits f1 = new Fruits(“Apple”);
Fruits f2 = new Fruits(“Orange”);
List<String> list = new List();
list.add(v1);
list.add(v2);
list.add(v3);
list.add(f1);
list.add(f2);
if(list.size==5)
{
System.out.println(“Both Vegetables and fruits are added”);
} else {
System.out.println(“Only one is added”);
}
}
What is the output of the program ?
CorrectIncorrect
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