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𝐖𝐚𝐧𝐭 𝐭𝐨 𝐌𝐚𝐬𝐭𝐞𝐫 𝐒𝐐𝐋? 𝐋𝐞𝐚𝐫𝐧 𝐒𝐐𝐋 𝐭𝐡𝐞 𝐫𝐢𝐠𝐡𝐭 𝐰𝐚𝐲 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐭𝐡𝐞 𝐦𝐨𝐬𝐭 𝐬𝐨𝐮𝐠𝐡𝐭 𝐚𝐟𝐭𝐞𝐫 𝐜𝐨𝐮𝐫𝐬𝐞 - 𝐒𝐐𝐋 𝐂𝐡𝐚𝐦𝐩𝐢𝐨𝐧𝐬 𝐏𝐫𝐨𝐠𝐫𝐚𝐦!
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30 INTERVIEWS IN 30 DAYS- BIG DATA INTERVIEW SERIES
This mock interview series is launched as a community initiative under Data Engineers Club aimed at aiding the community's growth and development
Expert guest interviewer, Sachin R, / sachin-r27 imparts invaluable insights and practical advice derived from extensive experience.
Suman Basu, / basusuman23 skilled guest interviewee, showcases an exceptional approach in answering interview questions.
Link of Free SQL & Python series developed by me are given below -
SQL Playlist - • SQL tutorial for every...
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Social Media Links :
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Student Testimonials - trendytech.in/#testimonials
Discussed Questions : Timestamp
1:37 Introduction
2:50 Brief about your project responsibilities
5:26 Discuss SQL code documentation best practices for ensuring query efficiency.
9:56 What are transformations and actions in PySpark DataFrames?
10:35 What are the best practices you have followed specific to PySpark?
12:39 What is the difference between cache and persist?
13:33 Explain the concept of partitioning.
14:58 When allocating multiple worker nodes/executors, how to increase or decrease the number of partitions?
16:38 Which is more effective in avoiding data skewness. Repartitioning or coalesce? what is data skewness?
18:07 Coding questions
36:20 Dealing with data quality issues
38:30 After fetching data from CSV files, how would you define the schema?
41:00 Preferred file format for data loading.
Tags
#mockinterview #bigdata #career #dataengineering #data #datascience #dataanalysis #productbasedcompanies #interviewquestions #apachespark #google #interview #faang #companies #amazon #walmart #flipkart #microsoft #azure #databricks #jobs

[@Vlogs..573]

Sachin is really knowledgeable, and he is helping to answer the questions as well with Suman.

[@sumitmittal07]

yes both have been great. Kudos to Sachin & Suman.

[@isenhiem]

This is such an amazing initiative...While watching the video I felt like as if I was being interviewed...I cant stress on how helpful this will be for so many people. It gave me a very good idea of the level of my preparation. Thanks a lot and I hope you will create more videos like this.

[@sharankarthick3364]

Informative!

[@prannay19]

Great initiative. Thank you Sumit Sir 🙏. Looking forward to more such videos. Keep up the good work 👍

[@sumitmittal07]

Thanks a ton

[@user-ji9ke8yb2d]

Thank you so much Sumit sir.Really a great initiative

[@sumitmittal07]

thank you very much

[@DataJourneyHuub]

Thank you Sumit Sir

[@sumitmittal07]

you are welcome

[@AliKhanLuckky]

36:03 1.he is asking only highest
2. Dept vise highest
Use sql code as follow
1.select max(salary) from emp;
2 select dept,max(salary) from emp group by dept;
As simple as that he did not asked you to write window function if he ask you then do it 😊

[@sriharidhanakshirur9245]

In case 1 , we should use WinDow function bcoz, we need to print id and name as well

[@AliKhanLuckky]

@@sriharidhanakshirur9245 in this case u can use sub query as well if anyone explicitly ask you is there any other way or do it using windows then at that time interviewer will get impress 😊

[@crunchyworks6374]

Sir as I see from last 3 days everytime cloud tech you use is Azure only , please make it on AWS too it’s very helpful

[@sumitmittal07]

definitely, you will see a lot of variety

[@RohitSharma-ny1oq]

Plz increase little bit complexity of interview because in actual its more complex 😊

[@sumitmittal07]

candidates mostly get stuck in basic fundamentals. These are actual people who conduct interviews in companies.

[@IsmailKhan-jy9ew]

Thankyou sumit sir for this initiative.

[@user-oy9cc8dv8i]

if possible mention the experience also , to which experience level these interview are targeting (like this is for 1 year, fresher or for 3 year experience )