Jio Team Lead and Developer Interview Questions and Answers

Q1. How to optimise fetching 1 lakh entries from db
Ans. 
Use pagination, indexing, caching, and query optimization to fetch 1 lakh entries efficiently from the database.
• Implement pagination to fetch data in smaller chunks

• Create indexes on columns frequently used in queries

• Use caching to store frequently accessed data

• Optimize queries by avoiding unnecessary joins and using appropriate indexes

• Consider using database-specific optimizations like query hints or stored procedures
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Q1. How to handle exception?
Ans. 
Handle exceptions by using try-catch blocks to gracefully manage errors in code execution.
• Use try-catch blocks to catch exceptions and handle them appropriately.

• Throw custom exceptions when necessary to provide more specific error information.

• Use finally block to execute code that should always run, regardless of whether an exception is thrown.

• Avoid catching generic exceptions like Exception class, instead catch specif...read more
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Q2. What is inheritance?
Ans. 
Inheritance is a concept in object-oriented programming where a class can inherit attributes and methods from another class.
• Allows for code reusability by creating a new class based on an existing class

• Derived class inherits properties and behaviors of the base class

• Supports the 'is-a' relationship, where a derived class is a specialized version of the base class
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Q1. About Previous Experience
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Q2. What Do you Know About TELICOM industry
Ans. 
The TELICOM industry refers to the telecommunications industry, which includes companies that provide communication services through various means such as telephone, internet, and television.
• TELICOM industry encompasses companies that offer services like telephone, internet, and television communication.

• Major players in the TELICOM industry include AT&T, Verizon, and Comcast.

• Technological advancements have led to the g...read more
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Q1. Round 1 is about basic questions on technology
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Q1. Round is about high level design and data structure questions
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It involves 2 problem solving logical questions

Case study based on previous work experience, mostly about market entry and situations

Q1. How I would respond to various situations and what my goals are.
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