Developer Big Data Interview Questions

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Data Modeling: Data Modeling Question for a hypothetical scenario where you have scope to work on your Data Warehousing knowledge. How will you design ETL pipelines for the model? SQL question to display data from your model. Python/SQL questions.
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Data Engineer

Interviewed at Meta

3.5
Dec 21, 2020

Data Modeling: Data Modeling Question for a hypothetical scenario where you have scope to work on your Data Warehousing knowledge. How will you design ETL pipelines for the model? SQL question to display data from your model. Python/SQL questions.

1. Given the sample: id, status 1, active 2, active 3, active 4, pending 5, expired 6, expired 7, expired 8, pending Pull the unique statuses that show up consecutively 3 times, e.g. from the sample, the output would be 'active', 'expired'. 2. Given the sample: employee, in_out, time A, IN, 6:00 B, IN, 7:00 A, OUT, 8:00 C, IN, 9:30 A, IN, 9:00 A, OUT, 10:00 B, OUT, 11:00 C, OUT, 10:00 Determine which employees are in the building at 10:30.
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Senior Data Engineer

Interviewed at Amazon

3.5
Jan 7, 2022

1. Given the sample: id, status 1, active 2, active 3, active 4, pending 5, expired 6, expired 7, expired 8, pending Pull the unique statuses that show up consecutively 3 times, e.g. from the sample, the output would be 'active', 'expired'. 2. Given the sample: employee, in_out, time A, IN, 6:00 B, IN, 7:00 A, OUT, 8:00 C, IN, 9:30 A, IN, 9:00 A, OUT, 10:00 B, OUT, 11:00 C, OUT, 10:00 Determine which employees are in the building at 10:30.

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