UST Sdet Lead Interview Questions and Answers

Add very long numbers integers.

Q1. System Design. Design central logging system.
Ans. 
Design a central logging system for efficient monitoring and troubleshooting.
• Use a centralized server to collect logs from all systems

• Implement log aggregation tools like ELK stack or Splunk

• Set up alerts for critical errors or anomalies

• Ensure secure access controls for log data

• Consider scalability and storage requirements
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Q2. Central logging system
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Q3. Ratelimit apis not system design
Ans. 
Ratelimiting APIs is a crucial aspect of ensuring system stability and preventing abuse.
• Implement rate limiting to restrict the number of API calls a user can make within a specific time frame.

• Use tokens or counters to track and enforce rate limits.

• Consider using a distributed cache or database to store rate limit data for scalability.

• Monitor and adjust rate limits based on usage patterns and system performance.

• Provide...read more
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Q1. Selenium framework, exceptions, how to right click double click,
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Q2. Rest assured, serialization , how to send POST request
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Q1. 2 sum problem in different approach
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Q2. Maximum sub array sum
Ans. 
Find the maximum sum of a contiguous subarray within an array of integers.
• Use Kadane's algorithm to find the maximum subarray sum efficiently.

• Initialize two variables - maxEndingHere and maxSoFar.

• Iterate through the array and update the variables accordingly.

• Example: Input [1, -2, 3, 4, -1, 2, 1, -5, 4], Output: 10 (subarray [3, 4, -1, 2, 1])
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Q1. Design LLD for factory pattern
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Factory pattern is a creational design pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created.
• Create an interface or abstract class to define the factory method

• Create concrete classes that implement the interface or extend the abstract class

• Factory class should have a method that returns an object of the interface type based on in
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Good and easy, guesstimate and puzzles

Questions are not much top .They asked one API response to validate a selenium code and a java programming .

Q1. Tell me about yourself
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It was actually a mix of aptitude and technical. 1st round included aptitude, English, essay writing and coding questions.

Q1. This was an online technical interview round. Questions were moderate on difficulty level. The interviewer was friendly and asked questions from the resume.
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Q1. Technical+HR round
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