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Big Data Engineer Interview Questions
1,228 big data engineer interview questions shared by candidates
Main things that were asked mainly revolved around SQL, Databases, Big Data, a bit of Linux or Unix commands. Coding Round consisted of 5 questions 1 question atleast of SQL, rest average coding questions.
What is OLAP?
The first round you will asked the following question. 1. Explain about the tera sort that happens between the map and reduce phase in hadoop job. 2. Explain about class loader, can you have more than one class loader in jvm. 3. Explain how indexing in implemented in sql databases, be prepared to take about b-tree and tree balancing algorithm. 4. How does java guarantee the hashmap look up in O(1). Round 2 1. You will asked to write java streaming code to parse infinite input while keeping memory low the output should predefined length of random sample.
Tell me something about your role in project?
Experienced with big data tools
Scenario-based questions etc. , they requested to delineate proposed architecture.
what is speculative execution in spark
Tell me about your journey that you had experienced or went through in the past 3 -4 years
SQL queries.data warehousing ,your self introduction and some basics questions related to the project.
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