Cognic Systems SDE Interview Questions and Answers

Q1. Traverse Binary Tree
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Q2. How does bittorent work
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Q1. Find minimum no. of increment operations to make array unique
Ans. 
To make an array of strings unique, count the number of duplicate elements and increment them accordingly.
• Iterate through the array and keep track of the frequency of each element.

• For each duplicate element, increment it to make the array unique.

• Return the total number of increment operations needed.
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Q2. Given a binary tree whose every node value is a number. find the sum of all the numbers that are formed from root to leaf paths
Ans. 
Sum all numbers formed from root to leaf paths in a binary tree
• Traverse the tree from root to leaf nodes, keeping track of the current number formed

• Add the current number to the sum when reaching a leaf node

• Recursively explore left and right subtrees
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Aptitude is pretty easy

Need to be good in communication skills

Q1. Focused more on Technical skills and behavioral + tech
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Q1. Resume and project based questions
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Q1. Current work and Salary
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Puzzle based questions and Math problems

Given a laptop and problem statement. Had to solve problems at eclipse.

Q1. F2F one on one technical interview
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Q1. Core java questions
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Q2. Depper into projects
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Q1. Basic and sone tricky hr questions
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Abcdef jssu ksye ksyd kahe jeheb

Q1. Introduce yourself
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Q2. Project related questions
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Graph dp and tree related mid-hard

Q1. Longest increasing subsequence
Ans. 
Find the longest increasing subsequence in an array.
• Use dynamic programming to keep track of the longest increasing subsequence ending at each index.

• Iterate through the array and update the longest increasing subsequence for each index.

• Return the maximum length of the longest increasing subsequence found.
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Apti test was easy 30 min test

Q1. How many year of experience
Ans. 
I have 5 years of experience in software development.
• I have worked in various roles such as software engineer, senior software engineer, and team lead over the past 5 years.

• During my time in the industry, I have gained experience in developing web applications, mobile apps, and backend systems.

• I have also worked with technologies such as Java, Python, JavaScript, and SQL.

• I have experience in Agile methodologies and hav...read more
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Q2. Your current ctc ?
Ans. 
My current CTC is $80,000 per year.
• My current CTC is $80,000 per year.

• I am currently earning $80,000 annually.

• My current salary package is $80,000 per annum.
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