Juspay Technologies Software Development Engineer Interview Questions and Answers

3 dsa questions medium level

Q1. 2 medium level dp questions based on string and stocks
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Q2. One hard question based on graph
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Q1. Hr questions and java , springboot questions etc
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Coding and aptitude round

Q1. Tree dsa questions
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Q1. Horse race question
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Q1. Location specific question
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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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3 medium leetcode questions

Q1. Questions of SQL and DBMS 2 DSA questions
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Q2. Valid parentheses in o(1) space
Ans. 
Check if parentheses are valid in constant space
• Use a counter to keep track of open parentheses

• Increment counter for '(' and decrement for ')'

• If counter goes negative or not zero at end, return false
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Q1. Projects and brain stroming
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Q2. Projects were asked in depth
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Q3. Interviewer had good technical knowledge
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