Valor PayTech Linux Server Administrator Interview Questions and Answers

Q1. Internal Implementation of HashMap
Ans. 
HashMap is implemented using an array of linked lists to handle collisions.
• HashMap stores key-value pairs in an array of linked lists

• Hash function is used to determine the index of the array where the key-value pair will be stored

• Collision handling is done by chaining, where multiple key-value pairs with the same hash value are stored in the same linked list

• HashMap allows null keys and values

• HashMap is not synchronized...read more
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Test was based on arrays and some dsa concepts.

Q1. They asked Java coding question
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It was a basic profitability case study

Profitability case study

Profitability case study

Q1. Basic questions why do you want to join and how would you tackle different situations in a work place
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Q1. What is Java String pool?
Ans. 
Java String pool is a special memory area in Java heap where String literals are stored to optimize memory usage.
• String pool is a part of Java heap memory.

• String literals are stored in the String pool to avoid duplicate objects.

• Strings created using double quotes are stored in the String pool.

• Strings created using new keyword are not stored in the String pool.
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Q1. Did you have any conflicts with your peers and have did you handle it?
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There was a hacker rank assignment

Leetcode style question, medium

Q1. System design question normal
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Coding question of moderate difficulty

Online Assessment - Maths, Verbal, Logical reasoning

Quant heavy case study from credit field