IBM Mainframe Tester Interview Questions and Answers

Method overloading is a feature in OOP where multiple methods can have the same name but different parameters.

• Method overloading is used to improve code readability and reusability.

• The methods must have different parameters, either in number or type.

• Example: void print(int num), void print(String str), void print(int num1, int num2)

• Method overloading is resolved at compile-time based on the number and type of arguments

A class is a blueprint for creating objects that have similar attributes and behaviors.

• A class is a user-defined data type that encapsulates data and functions.

• It provides a way to organize and structure code.

• Objects are instances of a class.

• Classes can inherit properties and methods from other classes.

• Examples of classes in programming languages include String, Integer, and List.

SQL is a programming language used to manage and manipulate relational databases.

• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• Common commands include SELECT, INSERT, UPDATE, and DELETE

• SQL is used in a variety of industries, including finance, healthcare, and e-commerce

DBMS stands for Database Management System. It is a software system that allows users to define, create, maintain and control access to databases.

• DBMS is used to manage large amounts of data efficiently.

• It provides a way to store, retrieve and manipulate data in a structured way.

• Examples of DBMS include MySQL, Oracle, and Microsoft SQL Server.