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SDE - 1

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3 rounds | 2 Coding problems

Interview preparation journey

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Preparation
Duration: 2 months
Topics: Data Structures, DBMS, Computer Networks, System Design, Operation System(Basic), OOPS
Tip
Tip

Tip 1 : Focus on OOPS fundamentals more.
Tip 2 : Prepare Data structures at least for moderate level
Tip 3 : Mention about projects only which you are fully confident about

Application process
Where: Referral
Eligibility: Need two development projects on Resume
Resume Tip
Resume tip

Tip 1 : At least 2 projects should be there
Tip 2 : Internships will help in 2nd round.

Interview rounds

01
Round
Medium
Online Coding Interview
Duration60 Minutes
Interview date17 Jan 2021
Coding problem1

Timing was around 6 pm in the evening, Interviewer was friendly enough to make me feel good. He started off with one problem on data structures. I solved that with in 20 mins. Then he asked me a problem on low level design. 
The exact problem was to design a Database schema for Coronavirus tracking. After writing the basic table structures, he came up with some followup questions like querying the scheme prepared.
In Last, he ended up with some questions for the company and best wishes.

1. Maximum Subarray Sum

Moderate
0/80
Asked in companies
AmazonOracleOptum

You are given an array/list ARR consisting of N integers. Your task is to find the maximum possible sum of a non-empty subarray(contagious) of this array.

Note: An array C is a subarray of array D if it can be obtained by deletion of several elements(possibly zero) from the beginning and the end of array D.

For e.g.- All the non-empty subarrays of array [1,2,3] are [1], [2], [3], [1,2], [2,3], [1,2,3].

Problem approach

I had already done this problem in past so i gave him a O(n^2) approach first.
But later, when he asked for optimisation, i gave him the proper Kadane's algorithm approach.

Try solving now
02
Round
Medium
Face to Face
Duration60 Minutes
Interview date16 Jan 2021
Coding problem1

It was around 7pm in the evening. The interview started with my and interviewer's introduction.
He started with system design and asked for the Database schema of a website that will be similar to StackOverflow.
After i made the schema he asked to write a query to fetch all the questions asked and the answers related to it.
Then he came up with some questions related to core concepts like:
1. Difference between multithreading and multiprocessing.
2. IpV4 vs IPV6

End was followed with me asking a couple of questions about company's culture.

1. Technical Question

System Design- Tables and relationships for Stackoverflow like platform.
1. Difference between multithreading and multiprocessing.
2. IpV4 vs IPV6

Problem approach

Tip 1 : Do practice for SQL queries.
Tip 2 : Watch Somyajit Bhatacharya's system design playlist
Tip 3 : Revise Core concepts well

03
Round
Easy
HR Round
Duration30 Minutes
Interview date17 Jan 2021
Coding problem0

It was at around 2pm in the day. Interview started with my introduction and followed up by some behavioral questions like:
1. Do you know about the company
2. Why Hashedin (Most important)
3. Case where i pushed my limits
4. What. will i do if my team member is not performing well enough

Here's your problem of the day

Solving this problem will increase your chance to get selected in this company

Skill covered: Programming

What is recursion?

Choose another skill to practice
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