Absolute Senior Java Developer Interview Questions and Answers

OA test 3 Dsa questions 2 medium 1 hard you have to solve 1.5 questions in 120 minutes

Q1. DSA Round Astreoid collision leetcode
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Q2. Dp question based on exclusion and inclusion
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DSA 2 question
1 -> Find Lca and traverse a tree path available on GFG
2 -> LinkedList pallindrome check (you have to solve that in 0(1) space complexity)

The exam duration is one and a half hours.

The total exam time is one and a half hours.

It encompasses all topics related to full stack development.

Q1. Asks questions on SQL
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Q2. Asks question in typical topics
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Q1. Where do you see yourself in two years?
Ans. 
In two years, I see myself as a senior software developer leading a team on innovative projects.
• Advancing to a senior software developer role

• Leading a team on new and innovative projects

• Continuing to enhance my technical skills through ongoing learning and training
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Q1. LRU Cache - how to tackle
Ans. 
LRU Cache is a data structure that maintains a list of items in order of most recently used to least recently used.
• Implement using a doubly linked list and a hashmap for efficient operations

• When an item is accessed, move it to the front of the list

• When the cache is full, remove the least recently used item from the end of the list
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Q2. LRU Cache implementation based on a real time system. How would the main work which will be called etc etc
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Q1. It was lld question to design a cab booking system.
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Q2. Tell me about yourself
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DSA + JAVA + Spring boot

LLD (bookmyshow) + DSA

Q1. Thread,oops,sql,find character count
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Q1. We have considered to directly send your profile to companies. How much CTC do you expect?
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Round duration - 30 minutes
Round difficulty - Easy

This was just a screening round to check my intention and communication skills. They just asked me why was I looking for a job change, and told me a little bit about the profile.

Q1. Basic HR Questions
Why are you looking for a job change? Are there any problems that you are facing in your current company?
Ans. 
Tip 1 : Keep the answers generic, do not bash or talk ill about your current company as it might create a bad impression.
Tip 2 : Some points that I presented were that I wanted to widen by domain, looking for better opportunities, etc.
Answered by CodingNinjas
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Round duration - 45 Minutes
Round difficulty - Easy

Since I had applied for a full stack profile, this round mainly consisted of front-end questions and some basic DSA questions. They had scheduled a call in the afternoon around 14:00 and the call was on Google meet where I had to share my screen and type in some code, once I was happy with my code and it worked fine, I had to paste it into the google doc. Actually, they had outsourced the interview rounds to the Interview Vector.

Q1. Flatten 2D array
You have to implement an iterator for ‘FLATTEN_2D’ to flatten a two-dimensional array ‘ARR_2D’ into a one-dimensional array ‘ARR_1D’. The iterator should support the following two operatio...read more
Ans. 
Basic DFS.
- Create an empty array and call it the result.
- Loop over the content of the array if it's a number push it into the result array else recursively call the function.
- Return the resultant array.
Answered by CodingNinjas
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Q2. Javascript Question
Write a polyfill for JS Array.reduceReduce is a higher order function that operates on an array and returns 1 single value.
Ans. 
Create the custom reduce function and add it to Array.prototype
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Q3. Javascript Question
Implement the following function:sum(1)(2)(3)(4)() returns 10sum(1)() returns 1sum() returns 0
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Round duration - 90 Minutes
Round difficulty - Easy

This round consisted of multiple easy DSA questions, some frontend questions, and one thought experiment related to design. Again, this round was conducted around 14:00 in the afternoon.

Q1. Anagram Pairs
Pre-requisites: Anagrams are defined as words or names that can be formed by rearranging letters of another word. Such as "spar" can be formed by rearranging letters of "rasp&q...read more
Ans. 
- Compare length of the strings and if they are not equal return false.
- Take a hashmap and store the number of occurrences of each letter in the first string.
- Iterate over the second string and if the ith character is not in the hashmap or the frequency is 0 then return false.
- return true.
Answered by CodingNinjas
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Q2. Technical Question
Let's say that some of our clients are complaining that our website is really slow/crashing for them. What could be possible solutions and how would you identify the problems.
Ans. 
Tip 1 : Mention the common solutions like optimizing assets, and bundle size.
Tip 2 : Think out of the box, maybe the problem was faced by people of a certain geographic location, check your load balancers, pods, use CDN, etc.
Tip 3 : Provide some solutions, in case we can't figure out whats happening because we are not able to reproduce the problem, add some analytics and crashlytics like Sentry in the frontend and enab
Answered by CodingNinjas
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