MasterCard Software Engineering Manager Interview Questions, Process, and Tips

Q1. Lazy loading and eager loading in Java in context of Singleton class
Ans. 
Lazy loading defers the initialization of an object until it is actually needed, while eager loading initializes the object immediately.
• Lazy loading is commonly used in Singleton pattern to delay the creation of the instance until it is requested.

• Eager loading initializes the Singleton instance at the time of class loading.

• Lazy loading can help improve performance by only creating the instance when needed, while eager ...read more
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Q2. Connect master and slave instances of a DB in spring boot project
Ans. 
Use Spring Boot configuration to connect master and slave instances of a DB
• Configure multiple data sources in application.properties or application.yml file

• Use @Primary annotation for the master data source and @Qualifier annotation for the slave data source

• Define separate DataSource, JdbcTemplate, and EntityManager beans for each data source

• Use @Transactional annotation with the appropriate data source to specify whic
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Q3. Global Exception handler in Spring boot
Ans. 
Global exception handler in Spring Boot handles all exceptions thrown by the application.
• Global exception handler can be implemented using @ControllerAdvice annotation in Spring Boot.

• It allows centralized exception handling for all controllers in the application.

• You can define methods annotated with @ExceptionHandler to handle specific exceptions.

• Global exception handler can return custom error responses or redirect to
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Q1. Basic oops, .net, c# coding, sql questions
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Q1. More coding and details on project
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Q1. More on projects and system design and troubleshooting approach
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Q1. Salary discussion
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Q1. More technical + managerial round even after HR round
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Q1. Basic Java questions
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The Two-Sum Problem solve using any programming language(like C#, Python, JavaScrpit ...)

Q1. -About Your project & architecture -Dependency injection -Azure Function & other services -Authentication & Authorization (JWT)
Ans. Dependency injection is a technique for achieving inversion of control between class and their objects
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Q2. What is Angular Interceptor?
Ans. 
Angular Interceptor is a middleware that intercepts HTTP requests and responses.
• It can be used to add headers, modify requests, handle errors, and more.

• Interceptors can be global or specific to a certain request.

• Example use cases include adding authentication tokens to requests or logging responses.

• Interceptors are implemented using the HttpInterceptor interface in Angular.
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Q3. What is Microservice C#?
Ans. 
Microservice C# is a software architecture pattern where an application is built as a collection of small, independent services.
• Each service is responsible for a specific task or feature

• Services communicate with each other through APIs

• Allows for scalability, flexibility, and easier maintenance

• Examples include Netflix, Amazon, and Uber
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Q4. About angular state management?
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Q5. It's the process of managing the state of the user controls.
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Q1. Tell me about yourself.
Ans. 
I am a senior software developer with over 10 years of experience in developing and implementing software solutions.
• I have expertise in multiple programming languages including Java, Python, and C++.

• I have experience in developing web applications using frameworks such as Spring and Django.

• I have worked on projects involving database design and management using SQL and NoSQL databases.

• I have experience in leading devel...read more
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Q1. Tell me about yourself and about previous organisation.
Ans. 
I am a software developer with 5 years of experience. I previously worked at XYZ Company as a full-stack developer.
• 5 years of experience in software development

• Previous role as a full-stack developer at XYZ Company

• Proficient in programming languages such as Java, Python, and JavaScript
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Q2. Basic technical questions about the framework and the specific language.
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Q1. More technical questions
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SQL and coding questions

Q1. Salary negotiation
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Basic aptitude , same syllabus that of tcs

Two debugging questions, of medium level

Q1. What are react hooks, class based components ,linked list ,palindrome , state in components , virtual and real dom
Ans. 
A set of concepts and tools used in React for managing state and rendering UI components.
• React hooks are functions that allow you to use state and other React features without writing a class component.

• Class based components are a way of defining React components using ES6 classes.

• Linked list is a data structure that consists of a sequence of nodes, each containing a reference to the next node.

• Palindrome is a word, phr...read more
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Q2. Sql quries, 2nd max salary, Nth max salary , Group by, deff between delete, truncate,drop
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