Mindtree Solutions Senior Software Engineer Interview Questions and Answers

Q1. What is metaspace?
Ans. 
Metaspace is a memory space in Java that stores metadata about classes and methods.
• Metaspace replaces the permanent generation (PermGen) in Java 8 and later versions.

• It is used to store class metadata, such as class names, method names, field names, annotations, etc.

• Metaspace is dynamically allocated and resized by the JVM as needed.

• It helps prevent OutOfMemoryError caused by PermGen space exhaustion.
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Q1. Are you familiar with Object-Oriented Programming (OOP)?
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Q2. What is the definition of a constant in PHP?
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General aptitude test

Q1. Basics of Python
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Q2. Basics of SQL and SQL query questions
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Q1. Detailed discussion about previous projects
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Q2. Python and SQL questions
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Easy round anyone with basic maths can clear the round.

The topic given to us is online education system,and the round was easy to clear.

Q1. Call by value vs call by reference
Ans. 
Call by value passes a copy of the variable, while call by reference passes the actual variable.
• Call by value: changes to the parameter inside the function do not affect the original variable.

• Call by reference: changes to the parameter inside the function affect the original variable.

• Example: Call by value - int x = 5; func(x); // x remains 5. Call by reference - int x = 5; func(&x); // x changes to the value set i
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Q1. Spark architecture.
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Q2. Narrow and wide transformations
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I applied for java developer role. I have 1 question paper I written the test . Then they will check and conduct for second round.

Q1. Strecture of sql statement
Ans. 
SQL statements are used to interact with databases by performing operations like querying, updating, and deleting data.
• SQL statements are made up of keywords like SELECT, INSERT, UPDATE, DELETE, etc.

• They are structured in a specific order, with clauses like WHERE, ORDER BY, GROUP BY, etc.

• Tables are referenced using their names, and conditions are specified to filter data.

• Joins can be used to combine data from multiple
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