Mphasis Senior Software Engineer Interview Questions, Process, and Tips

Round duration - 60 minutes
Round difficulty - Easy

This was a technical Interview round where I was asked questions related to Java and OOPS concepts.

Q1. What is a JIT compiler?
Ans. 
JIT compiler stands for Just-In-Time compiler, which compiles code during runtime instead of ahead of time.
• JIT compiler translates bytecode into machine code on-the-fly

• Improves performance by optimizing frequently executed code

• Examples include Java HotSpot, .NET CLR, V8 JavaScript engine
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Q2. Can you explain the SOLID principles in Object Oriented Design?
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SOLID principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.
• S - Single Responsibility Principle: A class should have only one reason to change.

• O - Open/Closed Principle: Software entities should be open for extension but closed for modification.

• L - Liskov Substitution Principle: Objects of a superclass should be replaceable...read more
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Q3. What are Java 8 streams?
Ans. 
Java 8 streams are a sequence of elements that support functional-style operations.
• Streams allow for processing collections of data in a declarative way.

• They can be used to perform operations like filter, map, reduce, and collect.

• Streams are lazy, meaning they only perform operations when necessary.

• Example: List<String> names = Arrays.asList("Alice", "Bob", "Charlie"); Stream<String> stream = names.stream()
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Q4. What is the difference between PermGen and MetaSpace in Java?
Ans. 
PermGen is a fixed size memory space for JVM metadata in Java 7 and earlier, while MetaSpace is a memory space that dynamically resizes in Java 8+.
• PermGen is used for storing class metadata, interned strings, and constant pool data.

• MetaSpace is used for storing class metadata, method data, and JIT code.

• PermGen has a fixed size and can lead to OutOfMemoryError if exceeded.

• MetaSpace dynamically resizes based on applicati...read more
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Round duration - 60 minutes
Round difficulty - Medium

This was a technical Interview round where I was asked questions related to Spring Boot framework and multithreading.

Q1. What is dependency injection?
Ans. 
Dependency injection is a design pattern where components are provided with their dependencies rather than creating them internally.
• Allows for easier testing by providing mock dependencies

• Promotes loose coupling between components

• Improves code reusability and maintainability

• Examples: Constructor injection, Setter injection, Interface injection
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Q2. What does the @SpringBootApplication annotation do internally?
Ans. 
The @SpringBootApplication annotation is used to mark the main class of a Spring Boot application.
• Combines @Configuration, @EnableAutoConfiguration, and @ComponentScan annotations

• Enables Spring Boot to automatically configure the application based on dependencies and classpath

• Marks the entry point of the Spring Boot application
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Q3. What is the default port of Tomcat in Spring Boot?
Ans. 
The default port of Tomcat in Spring Boot is 8080.
• The default port can be changed in the application.properties file by setting server.port property.

• To run the Spring Boot application on a different port, you can specify the port number as a command line argument.

• For example, to run the application on port 9090, you can use the command: java -jar -Dserver.port=9090 myapp.jar
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Round duration - 30 minutes
Round difficulty - Easy

HR round that lasted for about 30 minutes. The Interviewer asked questions to know more about me and we also dicussed the salary.

Q1. C# basics and .net core interview questions
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Q2. Angular life cycle hooks and Directives
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Q3. SQL server questions like dense rank and pivot and stored procedure vs. Function
Ans. 
Answering SQL server questions on dense rank, pivot, stored procedure vs. function
• Dense rank is used to assign a rank to each row within a partition of a result set

• Pivot is used to transform rows into columns

• Stored procedures are precompiled and stored in the database while functions are not

• Functions return a value while stored procedures do not necessarily have to

• Functions can be used in SELECT statements while stored...read more
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