An Approach to Solve a Real-world Problem

Interview process

The object-oriented design interview tests a candidate's understanding of OOP concepts and principles. The candidate is usually provided with a problem statement that the candidate deciphers and solves using their object-oriented design skills.

Generally, all OOD interview questions follow a similar pattern, where an ambiguous problem is presented to the candidate along with a group of constraints. It is for the candidate to understand the problem and identify all the main entities that will play a part and design a workable solution, one that is flexible and adaptable to change in the future.

To simplify things, you can use the following process to solve any OOD question.

Identify the requirements

The first few minutes (usually around 10 minutes) of the interview are for you to understand the entirety of the problem. You should use this time to gather the system's requirements by asking the interviewer questions. It is easier to work on a solution if there is a well-defined requirement set. You should also ask the interviewer if they expect you to implement the solution fully or give a structural overview. Try ...