Plumslice Labs Junior Java Developer Interview Questions and Answers

Object-oriented programming (OOP) is a programming paradigm that uses objects to represent and manipulate data.

• Encapsulation: bundling data and methods together in a class

• Inheritance: creating new classes from existing ones

• Polymorphism: using a single interface to represent different types of objects

• Abstraction: simplifying complex systems by breaking them into smaller, manageable parts

A SQL query that combines SELECT, UPDATE, GROUP BY, and ORDER BY clauses.

• Use the SELECT statement to retrieve data from a table.

• Use the UPDATE statement to modify data in a table.

• Use the GROUP BY clause to group rows based on a column.

• Use the ORDER BY clause to sort the result set based on one or more columns.