GQ India Java Developer Interview Questions and Answers

Q1. What you do? Description with analysis
Ans. 
I am a Java Developer responsible for designing, developing, and maintaining Java applications.
• Design and develop Java applications

• Write clean, efficient, and maintainable code

• Collaborate with team members to troubleshoot and solve technical issues
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Q1. Java,sql,python
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Q1. What is your goal
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Q1. Basic python qyestions
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Q2. Oops concepts in python
Ans. 
Oops concepts in Python include inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance allows a class to inherit attributes and methods from another class.

• Encapsulation restricts access to certain components within a class.

• Polymorphism allows objects to be treated as instances of their parent class.

• Abstraction hides complex implementation details and only shows the necessary features.
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Q3. Sql queries in framework
Ans. 
SQL queries are commonly used in frameworks for data manipulation and retrieval.
• SQL queries are used to interact with databases within a framework.

• Frameworks like Hibernate, Entity Framework, and Django ORM use SQL queries to perform database operations.

• SQL queries can be written directly in code or generated by the framework based on object-relational mapping.

• Examples: SELECT * FROM table_name WHERE condition, INSERT ...read more
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Q4. Inheritance and polymorphism
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Q5. Design pattern in python
Ans. 
Design patterns in Python are reusable solutions to common problems in software design.
• Design patterns help in creating maintainable and scalable code.

• Some common design patterns in Python include Singleton, Factory, Observer, and Strategy.

• Each design pattern has its own purpose and implementation.

• Design patterns promote code reusability and flexibility.
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There was aptitude test out of which 12 candidate selected

Q1. Asked me about my project in details
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Q2. What does group by do in SQL.
Ans. 
GROUP BY in SQL is used to group rows that have the same values into summary rows.
• GROUP BY is used with aggregate functions like COUNT, SUM, AVG, etc.

• It is used to summarize data by grouping rows based on specified columns.

• GROUP BY is often used in conjunction with the SELECT statement.
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Q3. Then asked about spring boot
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Q1. How do yo sharding in mongodb
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Q1. Python questions
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Q1. Why you want to work here
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Generale questions about my previous experience

Q1. Leetcode problem solving
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Q2. Leetcode problem solving 2
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Q1. Core java , spring boot , mysql , lunix
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Apt + coding questions, medium difficulty

Q1. Basics qs on oops and known programming language
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Q1. In-depth of oops and live coding questions
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Q1. Basics qs like y and what
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