ACT Fibernet Java Developer Interview Questions and Answers

Q1. How to pull the large amount of data in spring data jpa
Ans. 
To pull large amount of data in Spring Data JPA, use pagination, lazy loading, and query optimization techniques.
• Use pagination to limit the amount of data retrieved in each query

• Implement lazy loading to fetch data only when needed

• Optimize queries by using indexes, avoiding N+1 query problem, and fetching only necessary columns
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Q2. Write singleton class
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Singleton class ensures only one instance of a class is created and provides a global point of access to it.
• Create a private static instance of the class

• Provide a private constructor to prevent instantiation

• Create a public static method to access the instance
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Q1. How to make a new products
Ans. 
To make a new product, conduct market research, identify customer needs, develop a prototype, test it, gather feedback, and iterate.
• Conduct market research to identify gaps in the market and customer needs

• Develop a prototype of the product based on the research findings

• Test the prototype with a focus group or beta testers to gather feedback

• Iterate on the product based on the feedback received to improve its features an
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Q2. How to the growth the company
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Q1. Asking related to java, and good knowledge of Oops concepts
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Q2. Basic java program
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Q1. Asking past project and technology that you are using
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Q2. API related question like rest, sop
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Oops, singleton, api, array problems, logical part, springboot, hibernate

Q1. Hibernate coding, sessionFactory, git, maven, oops concepts, multithreading, synchronisation, String
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Q2. Introduction about yourself, project flow, why do you want to switch
Ans. 
I am a Java Developer with experience in project flow and looking to switch for new challenges.
• I have been working as a Java Developer for the past 5 years.

• I have experience in developing and maintaining Java applications.

• I am familiar with the project flow and have worked on various stages of software development life cycle.

• I am seeking new opportunities to enhance my skills and work on challenging projects.

• I am looki...read more
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Q1. Sql related ques mege into, rank,dense rank,queries of joins etc.
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Q2. Java 8 related ques optional and stream
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1st round some apt qns,some prgramming qns are they asked

Q1. C depth concepts and some prgram
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Q1. Some DSA questions they asked
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Q1. Reverse a linked list.
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Q2. Merge sort on a array/
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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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