PCS-Global Trainee Interview Questions and Answers

Q1. What Is Inheritance? Difference between Java and c++?
Ans. 
Inheritance is a mechanism in object-oriented programming where a class inherits properties and behaviors from another class.
• Inheritance allows code reuse and promotes code organization.

• In Java, classes can only inherit from a single class (single inheritance), while in C++, classes can inherit from multiple classes (multiple inheritance).

• Java uses the 'extends' keyword to implement inheritance, while C++ uses the ':' ...read more
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Q2. What is your short-term and lifeterm goals?
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Q1. What is Java ? What is Inheritance?
Ans. 
Java is a popular programming language known for its platform independence.
• Java is an object-oriented language.

• It was developed by Sun Microsystems.

• Java programs are compiled into bytecode and run on a Java Virtual Machine (JVM).

• Java supports inheritance, which allows classes to inherit properties and behaviors from other classes.

• Inheritance promotes code reusability and helps in creating a hierarchical class structure
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Q2. What is Joins? Difference between right join and Left Join?
Ans. 
Joins are used in databases to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables in a single query.

• Right join returns all the rows from the right table and the matching rows from the left table.

• Left join returns all the rows from the left table and the matching rows from the right table.

• In right join, if there is no match, NULL values are re...read more
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Basic coding knowledge

Q1. About yourself?
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