Paytm Senior Software Engineer Interview Questions, Process, and Tips

General reasoning, pattern, codding questions

Q1. Not remember what questions asked.
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Q1. Not remember what questions asked.
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It was DSA round with one basic and one medium question.

Q1. Asked Data structure, project-related, Java, and framework question. Java questions was hard and depth knowledge is needed.
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Q1. This round majorly focuses on the language part and project-related questions and again some in-depth questions on java were asked
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Q1. Questions related to day to day work with some tricky question
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Q1. Write program for internal implementation of hash map
Ans. 
Program for internal implementation of hash map
• Define a hash function to map keys to indices in an array

• Create an array of linked lists to handle collisions

• Implement methods for adding, removing, and retrieving key-value pairs

• Consider resizing the array when it becomes too full

• Handle edge cases such as null keys or values
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Q1. Whole garbage collector and its process in java
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Garbage collector in Java manages memory allocation and deallocation automatically.
• Garbage collector runs in the background and frees up memory that is no longer in use.

• It uses different algorithms like Mark and Sweep, Copying, and Generational.

• System.gc() can be used to request garbage collection, but it's not guaranteed to run immediately.

• Garbage collector can cause performance issues if not tuned properly.

• Java provi...read more
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Q1. About DB and scaling
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