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Welcome to the Data Types,Variables and Arrays MCQs Page

Dive deep into the fascinating world of Data Types,Variables and Arrays with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Data Types,Variables and Arrays, a crucial aspect of Java Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Data Types,Variables and Arrays, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Java Programming.

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Check out the MCQs below to embark on an enriching journey through Data Types,Variables and Arrays. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Java Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Data Types,Variables and Arrays. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Data Types,Variables and Arrays MCQs | Page 2 of 32

Discuss
Answer: (a).Sorted in the order of declaration of Enums
Q12.
What is the output of below code snippet?
class A
{
 
}
 
enum Enums extends A
{
    ABC, BCD, CDE, DEF;
}
Discuss
Answer: (b).Compilation Error
Q13.
What is the output of below code snippet?
enum Levels 
{
    private TOP,
 
    public MEDIUM,
 
    protected BOTTOM;
}
Discuss
Answer: (d).Compilation Error
Q14.
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;
    }
}
Discuss
Answer: (a).10
10
10
Q15.
Which method returns the elements of Enum class?
Discuss
Answer: (b).getEnumConstants()
Q16.
Which class does all the Enums extend?
Discuss
Answer: (c).Enum
Q17.
Are enums are type-safe?
Discuss
Answer: (a).True
Q18.
Which of the following is the advantage of BigDecimal over double?
Discuss
Answer: (d).Precision
Q19.
Which of the below data type doesn’t support overloaded methods for +,-,* and /?
Discuss
Answer: (d).BigDecimal
Q20.
What is the output of below code snippet?
   double a = 0.02;
   double b = 0.03;
   double c = b - a;
   System.out.println(c);
 
   BigDecimal _a = new BigDecimal("0.02");
   BigDecimal _b = new BigDecimal("0.03");
   BigDecimal _c = b.subtract(_a);
   System.out.println(_c);
Discuss
Answer: (a).0.009999999999999998
0.01
Page 2 of 32

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