Sigmoid Software Development Engineer Intern Interview Questions and Answers for Freshers

First round was on Hacker Earth

• Q1. Technical round was on Spring Data Jpa, Pagination, SOLID principles
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• Q1. Basics of sql and some coding questions
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• Q2. Data structures
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• Q1. Putin arrays strings
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• Q1. I was interviewed for 2yr experience. Normal Core java and basic sql question.
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• Q2. Oops concept. Collections. Abstract class and interface. Sql procedures and functions Sql basic query
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• Q1. Questions related to the projects worked till date. Explain your project. And counter question on your project.
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• Q2. How many projects have you worked on? Explain each in short.
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Round duration - 90 minutes
Round difficulty - Medium

The online test was scheduled on 10:00 AM. Total 304 students were eligible who appeared for the test. 93 students were shortlisted in this round. MCQs were asked and two coding question

MCQs were of medium to hard level.
OOPS(2 Question)
DBMS(2 questions)
Networking(2 Questions)
Operating System(2 Questions),
Aptitude(2 Questions)

• Q1. Maximum Subarray Sum You are given an array (ARR) of length N, consisting of integers. You have to find the sum of the subarray (including empty subarray) havin...read more
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• Q2. Flipping Coins Gary has N coins placed in a straight line. Some coins have head side up, and others have the tail side up. Convention: 1 denotes the HEAD side i...read more
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Round duration - 60 minutes
Round difficulty - Medium

It was technical interview round, which was purely based on coding followed by 1 SQL query. Duration of round was of 1 hour from 10 AM-11AM. Interviewer asked me 2 Coding questions one to solve and run on Hackerrank codepair platform and for another one she asked only my approach to solve problem. In the remaining last 10 minutes interviewer asked me 1 SQL query on JOIN. Total 28 students were shortlisted in this round.

• Q1. First Missing Positive You are given an array 'ARR' of integers of length N. Your task is to find the first missing positive integer in linear time and ...read more
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• Q2. Kth missing element Given an increasing sequence 'VEC', find the 'Kth' missing contiguous element in the given sequence starting from the leftmo...read more
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Round duration - 60 Minutes
Round difficulty - Medium

First there was a preplacement talk of company and interview process. Soon online test was conducted around 10 AM in consisting of MCQs, and coding question. Platform was smooth enough.

• Q1. Longest Palindromic Substring Given a string ’S’ consisting of lower case English letters, you are supposed to return the longest palindromic substring of ‘S’. ...read more
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Round duration - 45 Minutes
Round difficulty - Medium

The day after online test is done , Technical round was conducted at 9AM . Interview went well without distractions though it was online.

• Q1. Merge Sort Given a sequence of numbers ‘ARR’. Your task is to return a sorted sequence of ‘ARR’ in non-descending order with help of the merge sort algorithm. E...read more
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• Q2. SQL Question

  Gave three tables and attributes and asked to find names of employees whose balance is less than 200.

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Round duration - 45 Minutes
Round difficulty - Medium

• Q1. OS Questions

  paging 
  segmentation
  deadlock

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Round duration - 35 Minutes
Round difficulty - Medium

• Q1. Basic HR Questions

  Where do you see yourself  in 5 years?

  What is your greatest achievement?

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