First interview questions: 1) You have array of subsequent non-repeating integers, one is substituted with zero, then array is mixed, describe algorithm to sort array and find missing integer, its complexity. 2) Describe algorithm to find longest palindrome in a string, in what case amount of iterations will be biggest and in what smallest.
Big Data Experience
L1 round has questions on SQL, Hive, Python, Spark.Cleared the first round. L2 was F2F where i was asked to write code on Python. SparkCore, SQL, SparkSQL. The question were to read the files and find out max sold product basis of each product. And then was F2F which was on Hadoop: Rack Awarness Map and FlatMap Map and Reduce Partititon and Bucketting. Could not answer 2 questions on Hadoop Architecture.
How long was taking your Hive task to produce the output?
Hive Load vs Insert
Default number of mappers for a sqoop job? Can we import a table without primary key into hdfs using sqoop?
Your role in current organisation
Basics of SQL, spark data set creation
What is HAVING clause used with? (They wanted to hear Group By and Order By, they do not ask white board coding or any test to actually check your skills) What is Map-reduce?
How to know that the model is overfitting are not?
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