'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'
Cerner Corporation interview experience Real time questions & tips from candidates to crack your interview
SDE - Intern
Cerner Corporation
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4 rounds | 4 Coding problems
Interview preparation journey
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Preparation
Duration: 8 months
Topics: Data Structures, OOPS , Computer Networking , OS , SQL Queries , Cyber Security
Tip
Tip

Tip 1 : Practice at least 5-7 Codes daily from the beginning of preparation.
Tip 2 : Be thoroughly prepared with concepts of Data Structure, Database and Operating System
Tip 3 : Always go through the Company's Job description and About the Company and prepare your answers according to that
Tip 4 : Only mention Projects that you've complete idea about.

Application process
Where: Campus
Eligibility: 8.5 CGPA
Resume Tip
Resume tip

Tip 1 : Have a few Projects on your resume and make sure you know it all about your Projects.
Tip 2 : Only mention the Skills you feel you are confident about. Never lie on your resume.

Interview rounds
01
Round
Easy
Online Coding Interview
Duration90 minutes
Interview date9 Sep 2020
Coding problem1

This round was scheduled for 9am in the morning. The test environment was pretty good . I didn't face any issues on the HireVeu platform. The first test was of Aptitude and then in next section it was Technical MCQ's. The level of questions were mid to high level of difficulty.

1. DBMS Questions

What is DML and DDL?
Write an SQL query to print the FIRST_NAME from Worker table after replacing ‘a’ with ‘A’.
Write an SQL query to print details of the Workers whose FIRST_NAME contains ‘a’.
What is Normalization?

Problem approach

Tip 1: Do practice SQL Queries
Tip 2: Read Database Normalisation and Transaction.
Tip 3: Read Raghu Ram Krishnan thoroughly

02
Round
Medium
Online Coding Test
Duration60 minutes
Interview date13 Sep 2020
Coding problem1

The exam was on the same Platform. The first question was about the most difficult Project I've worked on. I have to record a video in that particular platform and then move to the next questions. There was option for a demo video of 1 minute in which you can practice your answers and then can record your answer in the next video of max 5 minutes. The next 2 question were Coding Problems of moderate difficulty and you've to record your approach and then proceed towards solving the code and then record a video stating if you succeed or not and what better could you've done to make it work.

1. Sum Of N Digit Palindromes
Easy
10m average time
80% success
0/40
Asked in companies
WiproCerner Corporation

You are given an integer 'N'. Your task is to return the sum of all N-digit numbers which are palindrome. A number is said to be palindrome if the number formed by...

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Problem approach

Run a loop from 10^(n-1) to 10^(n) – 1 and check when the current number is palindrome or not. If it is, adds its value to answer.

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03
Round
Medium
Face to Face
Duration45 minutes
Interview date1 Oct 2020
Coding problem2

This round was scheduled for 3pm. The interviewer was quite friendly. He asked about me and told me to relax and then answer. He started with asking questions from my Project and how the ideas behind the Project. My Project was related to Deadlock So he asked whether I can implement my Project on any environment. I answered . Then one of my internship Project was related to Web development so He asked me about the backend of the Project. He gave me a few SQL queries and some general DBMS concepts based on the response about using Mysql in the Project. He asked me a few things about AWS and Cloud Computing which I answered. At last he asked some LINUX commands and corrected me once and was satisfied with my answers.

1. OS Questions

1) What is Kernel?
2) What is Deadlock?
3) Why you use Binary semaphores instead of Counting Semaphores?
4) What is threads? What is hardware thread?
5) What is TLB?

Problem approach

Tip 1 : Read Galvin for OS thoroughly
Tip 2 : Practice MCQ's from GFG OS QUIZ Section

2. DBMS & Trees Questions

1) Explain DDL VS DML.
2) Explain Normalization
3) B+ Trees and it's working.

Problem approach

Tip 1 : Do practice SQL queries
Tip 2 : Give answers to Normalisation questions with examples for each
Tip 3 : Keep a paper with you while giving interview from home. Comes handy when I tried explaining B+ trees to him.

04
Round
Easy
HR Round
Duration10 minutes
Interview date1 Oct 2020
Coding problem0

It was late evening that I got a call from the HR team. They told me that they are satisfied with my Technical skills and asked me which role I would like to work for - Software Developer or System engineer. I was fine with both. Then they asked about location preferability and wished me luck for the results.

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