Epps Infotech Software Engineer Interview Questions and Answers for Experienced

Some maths related questions

Q1. Related to testing
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4 Coding Questions Were Given.
Check Palindrome String
Longest Increasing Subsequence
Group Anagrams
Add Two Numbers(Linked List)

Questions were picked from leetcode but the restriction of not using any inbuild function made them difficult to solve in the given time frame.

Q1. Basic Java Technical Questions
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Q2. Throws Vs Throw
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Throws is used for checked exceptions in Java, while throw is used to explicitly throw an exception.
• Throws is used in method signature to declare that the method may throw a checked exception.

• Throw is used to actually throw an exception in the code.

• Example: public void method() throws IOException { //code }

• Example: throw new IOException();
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Q3. Method Overriding Basics and Output-Based Questions
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Q4. Springboot annotations
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Q5. Inheritance and Concept of Abstract Classes and Interfaces
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Inheritance allows a class to inherit properties and behaviors from another class. Abstract classes cannot be instantiated and can have abstract methods. Interfaces define a contract for classes to implement.
• Inheritance allows a class to inherit properties and behaviors from another class

• Abstract classes cannot be instantiated and can have abstract methods

• Interfaces define a contract for classes to implement
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Q1. Questions on current projects. How & why were the frameworks used
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Q2. Asked basic questions on OS, networking, database
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Q3. Gave take home assignment of DSA questions. One question was to design LRU cache. Don't remember the other one,
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Q1. Difference between concurrency and parallelism
Ans. 
Concurrency is about dealing with multiple tasks at the same time, while parallelism is about executing multiple tasks simultaneously.
• Concurrency is about managing multiple tasks and switching between them quickly.

• Parallelism is about actually executing multiple tasks at the same time.

• Concurrency can be achieved in a single-core processor through task switching.

• Parallelism requires multiple cores or processors to execu...read more
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Q2. How will you sort 1TB of array/data
Ans. 
Use external sorting techniques like merge sort or quick sort to efficiently sort large amounts of data.
• Divide the 1TB array into smaller chunks that can fit into memory

• Sort each chunk individually using a fast sorting algorithm like merge sort or quick sort

• Merge the sorted chunks back together to get the final sorted array

• Consider using parallel processing or distributed systems for faster sorting

• Example: Divide the 1...read more
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Had to brief about myself, my technical skills and projects. Few Technical questions regarding the tech stack and casual discussion.

Q1. Oops concepts ?
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Q2. SQL queries related?
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General coding questions

30days training and project building

Q1. Completely on java
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Q1. Asked java questiona
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