Java Data Types, Variables and Arrays Mcqs
Our collections of Multiple choice questions and answers focuses on study of Java Data Types, Variables and Arrays . These questions are chosen from a collection of most authoritative and best reference books on Java Data Types, Variables and Arrays. Our aim is to prepare an individual for competitive exams like NTS, GAT, ECAT, University and College entrance exams and various tests and job interviews. One should practice our Mcqs to assimilate Data Types, Variables and Arrays comprehensively.
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2. What is the output of below code snippet?
class A
{
}
enum Enums extends A
{
ABC, BCD, CDE, DEF;
}
class A
{
}
enum Enums extends A
{
ABC, BCD, CDE, DEF;
}
3. What is the output of below code snippet?
enum Levels
{
private TOP,
public MEDIUM,
protected BOTTOM;
}
enum Levels
{
private TOP,
public MEDIUM,
protected BOTTOM;
}
4. What is the output of below code snippet?
enum Enums
{
A, B, C;
private Enums()
{
System.out.println(10);
}
}
public class MainClass
{
public static void main(String[] args)
{
Enum en = Enums.B;
}
}
enum Enums
{
A, B, C;
private Enums()
{
System.out.println(10);
}
}
public class MainClass
{
public static void main(String[] args)
{
Enum en = Enums.B;
}
}
5. Which method returns the elements of Enum class?
6. Which class does all the Enums extend?
7. Which of the following is the advantage of BigDecimal over double?
9. What is the output of below code snippet?
enum Enums
{
A, B, C;
private Enums()
{
System.out.println(10);
}
}
public class MainClass
{
public static void main(String[] args)
{
Enum en = Enums.B;
}
}
enum Enums
{
A, B, C;
private Enums()
{
System.out.println(10);
}
}
public class MainClass
{
public static void main(String[] args)
{
Enum en = Enums.B;
}
}
10. What is the base of BigDecimal data type?
11. What is the limitation of toString() method of BigDecimal?
12. Which of the following is not provided by BigDecimal?
13. BigDecimal is a part of which package?
14. What is BigDecimal.ONE?
15. Which class is a library of functions to perform arithmetic operations of BigInteger and BigDecimal?
16. What is the output of below code snippet?
public class AddDemo
{
public static void main(String args[])
{
BigDecimal b = new BigDecimal("23.43");
BigDecimal br = new BigDecimal("24");
BigDecimal bres = b.add(new BigDecimal("450.23"));
System.out.println("Add: "+bres);
MathContext mc = new MathContext(2, RoundingMode.DOWN);
BigDecimal bdecMath = b.add(new BigDecimal("450.23"), mc);
System.out.println("Add using MathContext: "+bdecMath);
}
}
public class AddDemo
{
public static void main(String args[])
{
BigDecimal b = new BigDecimal("23.43");
BigDecimal br = new BigDecimal("24");
BigDecimal bres = b.add(new BigDecimal("450.23"));
System.out.println("Add: "+bres);
MathContext mc = new MathContext(2, RoundingMode.DOWN);
BigDecimal bdecMath = b.add(new BigDecimal("450.23"), mc);
System.out.println("Add using MathContext: "+bdecMath);
}
}
