Mastercard Interview Process (Part 1) — Core Java | Spring Boot | Coding Round | CodeToCloud Academy

Part one, Mastercard interview process, round one and two. Welcome to Code to Cloud Academy, where you learn, build, and deploy. In today's video, we're diving deep into the Mastercard interview process, part one, covering round one and round two, the technical screening and the first Super Day round. Let's get started. Round one, technical

screening. The first round is all about your fundamentals, core Java, Spring Boot, and basic coding skills. It's usually a quick video or telephonic round conducted by a technical recruiter or an engineer. Let's look at some commonly asked questions. Java basics. What's the difference between hashmap and concurrent hashmap in Java? What's the difference between callable and

runnable? How does garbage collection work in Java? Spring Boot fundamentals. Explain the life cycle of a Spring Bean. What is dependency injection and why is it important? How does the at transactional annotation work in Spring Boot? Coding tasks. Write a function to find the second largest number in an array. Convert digits to words.

Implement a CRUD service in Spring Boot. This round checks how well you understand the basics and how quickly you can write clean working code. Round two, technical round one. The second round is more detailed. This is where your backend and architecture knowledge really get tested. You'll discuss APIs, microservices, and performance optimization. Some of the questions you

might face include multiple coding questions using Java streams, map, filter, reduce and collect. What's the difference between at rest controller and at controller and spring boot? How does spring boot handle security by default? What is the circuit breaker design pattern in microservices? How do you optimize a database query with millions of rows? And of course, what