'Coding has over 700 languages', '67% of programming jobs aren’t in the technology industry', 'Coding is behind almost everything that is powered by electricity'
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SDE - Intern
Samsung
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3 rounds | 15 Coding problems
Interview preparation journey
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Preparation
Duration: 2 months
Topics: DBMS, OS, OOPS, Dynamic Programming, Trie DS, Graphs, Standard Algorithms
Tip
Tip

Tip 1 : Do prepare OOPS, OS and DBMS
Tip 2 : Solve must do interview questions of GFG
Tip 3 : Participate in codeforces & leetcode contests
Tip 4 : Prepare for HR type questions

Application process
Where: Campus
Eligibility: Above 7.5 CGPA
Resume Tip
Resume tip

Tip 1 : Have at least two good projects
Tip 2 : Don't write false things on resume. Write what you know and feel confident about !!
Tip 3 : Mention your technical achievements

Interview rounds
01
Round
Medium
Online Coding Test
Duration70 minutes
Interview date25 Sep 2020
Coding problem3

Online Coding Round held on CoCubes Platform 
Duration: 70 mins Camera and Mic enabled

Tip: 1) CoCubes platform does allow to use in-built library functions. So one cannot use even in-built sort function.
2) Make sure you write the most optimal code in terms of time complexity.

Questions were put from a question bank so they were different to each candidate. 
Shortlisting for next round was done based on time taken, code readability and hidden test cases clearance.
Around 6 students were selected for next round.

1. Ceil from BST
Easy
15m average time
85% success
0/40
Asked in companies
FlipkartPaytm (One97 Communications Limited)Samsung

Ninja is given a binary search tree and an integer. Now he is given a particular key in the tree and returns its ceil value. Can you help Ninja solve the problem?

Note:
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2. Remove BST keys outside the given range
Easy
15m average time
85% success
0/40
Asked in companies
UberSamsungPaypal

Given a Binary Search Tree (BST) and a range [min, max], remove all keys which are outside the given range. The modified tree should also be BST.

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3. Minimum insertions to make a string palindrome
Moderate
30m average time
70% success
0/80
Asked in companies
Paytm (One97 Communications Limited)Morgan StanleyTata Consultancy Services (TCS)

A palindrome string is one that reads the same backward as well as forward.


You are given a string 'str'.


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02
Round
Medium
Video Call
Duration50 minutes
Interview date26 Sep 2020
Coding problem7

Technical Interview held over Skype video call. Interviewer was friendly.
Timing: Around 11 am

I was asked to share my screen and code of any preferred editor.

1. Merge Sort Linked List
Moderate
10m average time
90% success
0/80
Asked in companies
GrabSamsung R&D InstituteNatwest Group

You are given a Singly Linked List of integers. Sort the Linked List using merge sort.

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2. Reverse Linked List
Easy
15m average time
85% success
0/40
Asked in companies
FlipkartPaytm (One97 Communications Limited)Hexaware Technologies


Example:

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3. Implement a priority queue
Moderate
0/80
Asked in companies
OracleOYOSamsung

You have to implement the pop function of Max Priority Queue and implement using a heap.


Functions :
a) push(int x) : 'x' has to be inserted in t...
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4. Insertion in AVL Tree
Moderate
20m average time
80% success
0/80
Asked in companies
OracleGoldman SachsQuikr

Ninja has to implement an ‘AVL_TREE’ from scratch.

He is given ‘N’ values, representing the values of nodes to be inserted. Ninja has to insert these values i...

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5. Longest Palindromic Substring
Moderate
20m average time
80% success
0/80
Asked in companies
Morgan StanleyHCL TechnologiesFlipkart

You are given a string 'str' of length 'N'.


Your task is to return the longest palindromic substring. If there are multiple strings, return any.


...

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6. Puzzle

How do we measure forty-five minutes using two identical wires, each of which takes an hour to burn? We have matchsticks with us. The wires burn non-uniformly. So, for example, the two halves of wire might burn in 10 minutes and 50 minutes respectively.

7. OS Questions

Questions related to virtual memory and cache implementation.

03
Round
Hard
Video Call
Duration32 minutes
Interview date26 Sep 2020
Coding problem5

Technical Interview held over Skype video call. Round stared with "Tell me about yourself ?" question and then the interviewer reviewed my resume and asked some project related question. Then he moved to coding & OOPS related questions.

For coding problems I was asked to share my screen and code in my preferred editor. For each question optimized solution was expected by the interviewer.

1. Remove Consecutive Duplicates
Easy
0/40
Asked in companies
SAP LabsAmazonGoldman Sachs

For a given string(str), remove all the consecutive duplicate characters.

Example:
Input String: "aaaa"
Expected Output: "a"

Input String: "aabbbcc"
Expec...
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2. Maximum subsequence sum such that no three are consecutive
Moderate
15m average time
85% success
0/80
Asked in companies
DunzoPaytm (One97 Communications Limited)Samsung

You are given an array A of length N consisting of positive integers. Your task is to print the maximum subsequence sum such that no three consecutive elements are taken from array A.

Note:...

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3. Longest Substring Without Repeating Characters
Moderate
20m average time
80% success
0/80
Asked in companies
OptumAdobeInfo Edge India (Naukri.com)

Given a string 'S' of length 'L', return the length of the longest substring without repeating characters.

Example:

Suppose given input is ...
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4. Aptitude Question

How many rectangles and squared are there in a chessboard.
 

5. OOPS Questions

Design a class of shapes
Some basic oops questions, singleton design patterns , cons & des calling seq , dangling objects/pointers , diamond problem

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