FireCompass Interview Questions, Process, and Tips

Q1. How would you debug an error
Ans. 
I would start by reproducing the error, checking logs, reviewing code, and using debugging tools.
• Reproduce the error to understand the exact conditions that trigger it

• Check logs for any error messages or warnings

• Review the code related to the error to identify potential issues

• Use debugging tools like breakpoints, print statements, or a debugger to step through the code

• Isolate the problem by narrowing down the scope of
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Dataweave logic questions

Q1. Basic HR questions
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Q2. Prepare basic interview answers
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Aptitude Test + some JAVA + SQL Questions

DSA+SPRING+SQL+JAVA
IN THIS ROUND INTERVIEWER ASKED ME 1DSA QUESTION WHICH IS BASED ON DEQUE SOME SQL QUERIES WHICH IS ON JOINS AND BASIC SPRING QUESTIONS

SAME AS THE 2ND ROUND BUT THE LEVEL INCREASED AS COMPARISON TO ROUND-2

Q1. IN THIS ROUND MANAGER ASKED ME SOME QUESTIONS ABOUT MY BACKGROUND AND COLLEGE PROJECT AND ASKED ABOUT MY PREVIOUS EXP
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Easy problem on java

Q1. Technical discussion
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Q1. Threading: Write and use a mutex?
Ans. 
A mutex is a synchronization primitive that ensures only one thread can access a resource at a time.
• Create a mutex object using the appropriate library or language-specific function.

• Lock the mutex before accessing the shared resource to prevent other threads from accessing it.

• Unlock the mutex after finishing the operation on the shared resource to allow other threads to access it.

• Example: pthread_mutex_t mutex; pthread...read more
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Q2. Find the memory leak in a given set of code.
Ans. 
Identify memory leak in code
• Check for any dynamically allocated memory that is not being freed

• Look for any infinite loops or recursive functions that consume memory

• Use memory profiling tools like Valgrind to detect leaks

• Check for any global variables that are not properly managed
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Q1. How to check a number is power of 2
Ans. 
To check if a number is a power of 2, we can use bitwise operations.
• A power of 2 has only one bit set to 1, so we can use the bitwise AND operator to check if the number is a power of 2.

• If n is a power of 2, then n & (n-1) will be 0.

• For example, 8 (1000 in binary) is a power of 2, and 8 & 7 (0111 in binary) is 0.
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Q2. Sort a stack without using another data structure
Ans. 
Sort a stack without using another data structure
• Use recursion to pop the top element and insert it at the bottom of the remaining stack

• Repeat until the stack is sorted in ascending order

• Time complexity: O(n^2), space complexity: O(n) due to recursion
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Q3. Check weather array have continuous increasing than decreasing value
Ans. 
Check if array has continuous increasing and decreasing values
• Loop through the array and check if each element is greater than the previous one

• Once you find the maximum element, check if the remaining elements are in decreasing order

• If yes, return true else false
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Q1. Design a cricinfo (LLD)
Ans. 
Design a cricinfo (LLD)
• Identify the entities: players, teams, matches, scorecards, tournaments, etc.

• Define the relationships between entities

• Create a database schema to store the data

• Implement APIs to fetch and update data

• Design a UI to display the information

• Consider scalability and performance

• Ensure data security and privacy
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Q1. Share details of your previous job.
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Q2. Why should we hire you?
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Q3. What are your strengths and weaknesses?
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