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Er werd een Hadoop Engineer gevraagd...6 november 2013

Decorator pattern

4 antwoorden

do you remember any other questions asked?

equal() vs hashcode() record reader vs input format

thanks , where hadoop Mapreduce code asked during coding round?

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Mostly about Hadoop technologies HDFS, MapReduce, Hbase, Hive.

2 antwoorden

Answered almost all questions

Hello, Thank you for your interest in Nisum and taking the time to provide feedback. We take all input very seriously here at Nisum, and would like to take this opportunity to help clarify the situation you've referenced. As we discussed and was conveyed to you, Nisum (like many other firms looking for excellent talent) believes in offering the best offer to a candidate after a thorough technical and behavioral assessment. After our evaluation, we found that there was misalignment in expectations between parties. Your expectations seemed to be based on hearsay about working on the west coast. There was also an apparent mismatch between your current views as a contractor versus joining as a full time employee. Finally, we did not say that "you are eligible for less salary." A formal offer was never extended as we could not meet each other's expectations. We apologize if you believe that the interview process was not as you'd hoped. Again, thank you for your interest in Nisum Technologies! Wishing you the best! Nisum HR Minder


Better dont ask

2 antwoorden

Prepare well for interview. Interviewer knows what they need . Better upgrade your skills. Minder

Interviewer should also know how to behave. His attitude towards interview candidates is regressive Minder


I was not asked even a single proper technical question. It was more so like an hr round.


print department wise salary using mapreduce, hive, pig, spark. One question with different concepts.

1 antwoorden

in hive select salary from tablename order by dept in spark scala val sl=sqlContext.sql(select salary from tablename order by dept) Minder

Larsen & Toubro

Technical questions related to your technology

1 antwoorden

I have answer for most of them


Describe how you implemented MapReduce jobs Describe what data is generated when you run a MR/Tez job Which file format is best to store files in?

1 antwoorden

Best file format (at the time) was ORC as it was compressed and not cleartext/flat file. Parquet is also a good option and is now considered standard (this was before Delta). Minder

Happiest Minds Technologies

4. given the http url,write the regex to get different parts of url like : protocol, server, path

1 antwoorden

provided the regex and parts but not sure why they rejected.


Hive Static partition vs Dynamic partition

1 antwoorden

Insert input data files individually into a partition table is Static Partition, fast, can alter the partition, set hive.mapred.mode = strict Single insert to partition table is known as a dynamic partition, slow, can’t perform alter, don’t know how many columns Minder


Sqoop - JDBC connection. How does Sqoop work

1 antwoorden

How does Flume work? Explain Flume config file

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