Paytail Software Engineer Interview Questions and Answers for Experienced

Q1. Insights about company and candidate
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Q2. If I know Data structures or not?
Ans. 
Yes, I have knowledge of data structures.
• I have experience with common data structures like arrays, linked lists, stacks, queues, trees, and graphs.

• I understand the time and space complexity of different data structures and their operations.

• I have implemented data structures in various programming languages like C++, Java, and Python.

• For example, I have used a hash table to efficiently store and retrieve data in consta
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There were 2 easy question 1 medium
Question were good but have weak test case.

This was project or lld round.
You just be aware of class and other stuff.

Q1. Discussion on project Asked graph coding question in real scenerio. Like asked what algorithm you will use for different real life problems
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Q1. Why engineering and what u know about cred
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Build a typeahead component

Q1. Build a form for personal details
Ans. 
Build a form for personal details
• Include fields for name, email, phone number, address, date of birth

• Use input fields, dropdowns, and date pickers for user input

• Add validation for required fields and correct formats

• Consider user experience with clear labels and easy navigation
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Q2. Add validations to different fields
Ans. 
Implement validations for different fields in software development.
• Identify the fields that require validation such as email, password, phone number, etc.

• Use regular expressions to validate input data format.

• Implement client-side and server-side validations to ensure data integrity.

• Display error messages for invalid input to guide users on correct data entry.
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Implement phone directory search system

There was a Hackerearth test with two questions

Q1. Some standard data structures question on array
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Q2. Standard question on trees
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Q1. Anagram question
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Q2. Sql join questions
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The Question was average, the interviewer had a fixed approach in mind, which he wanted to follow, but was friendly and trying to help. Overall a good experience.

A coding test based on data structure and Algorithms.

Q1. Question based on Projects in the resume
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Q2. Data Structure and Algorithms Object oriented programming Database management system Operating system
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