This Java Questions and Answers are prepared with the students and those preparing for their interviews in mind. The questions have been designed by the leading experts from various Educational and Corporate Institutions. This covers all the aspects of the language needed for the easy understanding and the appreciation of the language usefulness. The best […]
What is a Private Constructor in Java
Most novice programmers are not aware of the possibility to have private constructor in Java. Private constructor is special constructor which is commonly used in classes containing static members. In classes which have private constructor and no public constructor, other classes won’t create any instance in this class. When methods are declared as a private […]
Difference between method overloading and overriding
The confusion between the method overloading and method overriding is a common problem among novice Java programmers. This article will provide you the explanations for overloading and overriding with some fair examples. What is Method Overloading? When two or more methods belonging to same class with similar name and different parameters, method overloading occurs. Always […]
How the System.out.println() is working in Java?
Most interviewers don’t expect the correct answer for this question. But this question is asked to know about the candidate’s knowledge about Java and their thinking ability. This question is a sample for how you can solve a problem with some fundamental dogma in Java. In Java, dot operator is only used to call variables […]
SQL: Inner vs Outer join
To comprehend the difference between the two types of joins i.e. inner join and Outer join in SQL, let’s first revise the basic knowledge about the join in SQL, the inner join and the outer join. What is a join in SQL? A join in SQL may be defined as a way which is used […]
SQL: Clustered vs non clustered Index
An index in SQL may be defined as a structure linked with a particular table and is stored on the disk, mainly created to enhance the speed of the retrieval of data. The key for an index in SQL is created from one or more than one column present in a particular table or even […]
SQL questions: What is an index?
An Index in SQL may be defined as the secondary database object which is connected to a specific table to enhance the process of retrieval of the associated rows from that particular table. It can be defined for a specific single column or for multiple columns. We can also view an index of SQL as […]
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