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𝐖𝐚𝐧𝐭 𝐭𝐨 𝐌𝐚𝐬𝐭𝐞𝐫 𝐒𝐐𝐋? 𝐋𝐞𝐚𝐫𝐧 𝐒𝐐𝐋 𝐭𝐡𝐞 𝐫𝐢𝐠𝐡𝐭 𝐰𝐚𝐲 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐭𝐡𝐞 𝐦𝐨𝐬𝐭 𝐬𝐨𝐮𝐠𝐡𝐭 𝐚𝐟𝐭𝐞𝐫 𝐜𝐨𝐮𝐫𝐬𝐞 - 𝐒𝐐𝐋 𝐂𝐡𝐚𝐦𝐩𝐢𝐨𝐧𝐬 𝐏𝐫𝐨𝐠𝐫𝐚𝐦!
"𝐀 8 𝐰𝐞𝐞𝐤 𝐏𝐫𝐨𝐠𝐫𝐚𝐦 𝐝𝐞𝐬𝐢𝐠𝐧𝐞𝐝 𝐭𝐨 𝐡𝐞𝐥𝐩 𝐲𝐨𝐮 𝐜𝐫𝐚𝐜𝐤 𝐭𝐡𝐞 𝐢𝐧𝐭𝐞𝐫𝐯𝐢𝐞𝐰𝐬 𝐨𝐟 𝐭𝐨𝐩 𝐩𝐫𝐨𝐝𝐮𝐜𝐭 𝐛𝐚𝐬𝐞𝐝 𝐜𝐨𝐦𝐩𝐚𝐧𝐢𝐞𝐬 𝐛𝐲 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐢𝐧𝐠 𝐚 𝐭𝐡𝐨𝐮𝐠𝐡𝐭 𝐩𝐫𝐨𝐜𝐞𝐬𝐬 𝐚𝐧𝐝 𝐚𝐧 𝐚𝐩𝐩𝐫𝐨𝐚𝐜𝐡 𝐭𝐨 𝐬𝐨𝐥𝐯𝐞 𝐚𝐧 𝐮𝐧𝐬𝐞𝐞𝐧 𝐏𝐫𝐨𝐛𝐥𝐞𝐦."
𝐇𝐞𝐫𝐞 𝐢𝐬 𝐡𝐨𝐰 𝐲𝐨𝐮 𝐜𝐚𝐧 𝐫𝐞𝐠𝐢𝐬𝐭𝐞𝐫 𝐟𝐨𝐫 𝐭𝐡𝐞 𝐏𝐫𝐨𝐠𝐫𝐚𝐦 -
𝐑𝐞𝐠𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧 𝐋𝐢𝐧𝐤 (𝐂𝐨𝐮𝐫𝐬𝐞 𝐀𝐜𝐜𝐞𝐬𝐬 𝐟𝐫𝐨𝐦 𝐈𝐧𝐝𝐢𝐚) : rzp.io/l/SQLINR
𝐑𝐞𝐠𝐢𝐬𝐭𝐫𝐚𝐭𝐢𝐨𝐧 𝐋𝐢𝐧𝐤 (𝐂𝐨𝐮𝐫𝐬𝐞 𝐀𝐜𝐜𝐞𝐬𝐬 𝐟𝐫𝐨𝐦 𝐨𝐮𝐭𝐬𝐢𝐝𝐞 𝐈𝐧𝐝𝐢𝐚) : rzp.io/l/SQLUSD
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
Our highly experienced guest interviewer, Solon Kumar Das, / solondas shares invaluable insights and practical guidance drawn from his extensive expertise in the Big Data Domain.
Our expert guest interviewee, shashank chakrawarty, / cshashank has an interesting approach to answering the interview questions on Spark, SQL, Azure Services & Big Data Project.
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 :
LinkedIn - / bigdatabysumit
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Student Testimonials - trendytech.in/...
TIMESTAMPS : Questions Discussed
00:58 Introduction and project explanation
2:51 Reason for migrating from GCP to AWS?
3:57 Use cases solved in migration projects, challenges faced, and volume of data?
9:44 Explanation of cost savings and performance improvements mentioned in the resume?
10:40 Explain the reason for the out of memory issue that you faced.
12:00 How can you optimize data access performance for teams using ingested data during the day, given nightly ingestion in RDBMS?
20:56 How is the history stored in delta tables?
22:50 Features offered by delta tables?
23:35 Explain meaning and types of ACID properties.
25:35 Explanation of normalization and denormalization, types of normalization?
28:05 Preferred table type for aggregated reporting: wide or long?
29:21 Sql coding questions
37:10 Python coding questions
Music track: Retro by Chill Pulse
Source: freetouse.com/...
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#mockinterview #bigdata #career #dataengineering #data #datascience #dataanalysis #productbasedcompanies #interviewquestions #apachespark #google #interview #faang #companies #amazon #walmart #flipkart #microsoft #azure #databricks #jobs

[@imranhossain1660]

Delta table maintains history with the help of transaction lo files which are in json format. This log files helps delta table to maintain different table snapshot version, time travel feature and maintain ACID property. As we know concurrent read and write opearions is possible in delta tabel by the log files. The actual data is stored in delta table stored in parquet format. Over the time it geneerates so much small data files and to comapct the smaller files we can use optimize and zorder command on delta table.
The VACUUM command in Delta Lake is used to remove old data files that are no longer accessible from the current state of the table and are beyond the retention period and not part of the latest snapshot version of delta table.

[@solondas96]

Great explanation ❤

[@imranhossain1660]

@@solondas96 Thank you

[@divakarjona7603]

Data Engineer interview series helping a lot. Please make videos on GCP as well. Thanks.

[@dipakchavan4659]

This Mock interviews series is really good, but how do we know that candidates attending interview is anwering correctly or not. If he or she answers wrong then how do we know?

[@abhishekmohanty9971]

Just my suggestion, dont look for correct answers in interview. If you know the answer already then you know whether its wrong or correct. If you dont know then i would suggest please read on that topic because you will not get complete picture even if the interviewee is correct. Just look how the interviwee is approaching the questions even to the unknown questions plus what kind of questions are being asked.
I hope your query is aptly answered.

[@solondas96]

Aptly explained abhishek.
Mock interviews are mostly to test a candidate’s approach to a certain problem. In an interview there is no complete right or wrong answer. It basically tests on the candidates ability to hold their composure and try their best to reach the solution to the question asked.
Let me know if you want to know all the correct answer to the questions i have asked. I would post it in the comments section for your reference. 😊
Happy Learning