MasterCard Software Engineering Manager Interview Questions, Process, and Tips

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Q1. Design File Search
Ans. 
Design a file search feature for a software application.
• Implement a search bar where users can input keywords or phrases to search for files.

• Include filters for file type, date modified, and other relevant criteria.

• Display search results in a user-friendly format with relevant file details.

• Allow users to preview files before opening or downloading them.

• Consider implementing search suggestions or autocomplete functional...read more
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Q2. Design BookMyShow
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Asked to write a bank application - which includes adding,removing,transferring of money

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. Basics of angular, ts,js
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Q1. Programming questions
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Q1. Family backgroud
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The topic was -> "One nation one election"

Q1. What is a String pool in Java?
Ans. 
String pool in Java is a pool of unique strings stored in memory to optimize memory usage.
• String pool is a part of Java's memory where unique string literals are stored.

• When a new string is created, Java checks if it already exists in the pool to save memory.

• Strings created using double quotes are added to the pool, while those created using 'new' keyword are not.

• Example: String str1 = "hello"; String str2 = "hello"; /...read more
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Q2. Explain different types of exception in Java.
Ans. 
Java has checked and unchecked exceptions. Checked exceptions must be handled at compile time, while unchecked exceptions do not need to be handled explicitly.
• Checked exceptions: Must be caught or declared in the method signature. Example: IOException, SQLException

• Unchecked exceptions: Do not need to be caught or declared. Example: NullPointerException, ArrayIndexOutOfBoundsException
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Q1. Sort the list, after many queries
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Q2. LRU cache with multi level caching
Ans. 
LRU cache with multi level caching involves implementing a cache with multiple levels of storage, where the least recently used items are evicted first.
• Implement a two-level cache system with a primary cache (e.g. in-memory) and a secondary cache (e.g. disk-based).

• Use a data structure like a doubly linked list and a hash map to efficiently manage the cache and track the least recently used items.

• When an item is accesse...read more
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