Tree, Stack, Multithreading.
Big Data Engineer Interview Questions
1,228 big data engineer interview questions shared by candidates
Shared in DescriptionQuestion1) If we have input.csv, we need to find the output. File and desired output are given below. username, mobile user1,999999991:888888882 user3,777777771 user2,777777234:823232351 user5,734452343:943433434:834323434 user1,999999991:9994433777 output user1:3 user2:2 user3:1 Question2) How can we read a csv file into dataframe Question3) Option to modify the encoding while reading a file in Scala Question 4) Optin to modify the timestamp while reading a file Question 5) How to introduce separators like "," while reading a file Question 6) How to infer Schema =============================== Question 7) How have below 2 tables, we need to find out users who visited a bank but didn't make any transactions? -- Visits table: -- +---------+------------+ -- | user_id | visit_date | -- +---------+------------+ -- | 1 | 2020-01-01 | -- | 2 | 2020-01-02 | -- | 12 | 2020-01-01 | -- | 19 | 2020-01-03 | -- | 1 | 2020-01-02 | -- | 2 | 2020-01-03 | -- | 1 | 2020-01-04 | -- | 7 | 2020-01-11 | -- | 9 | 2020-01-25 | -- | 8 | 2020-01-28 | -- +---------+------------+ -- Transactions table: -- +---------+------------------+--------+ -- | user_id | transaction_date | amount | -- +---------+------------------+--------+ -- | 1 | 2020-01-02 | 120 | -- | 2 | 2020-01-03 | 22 | -- | 7 | 2020-01-11 | 232 | -- | 1 | 2020-01-04 | 7 | -- | 9 | 2020-01-25 | 33 | -- | 9 | 2020-01-25 | 66 | -- | 8 | 2020-01-28 | 1 | -- | 9 | 2020-01-25 | 99 | -- +---------+------------------+--------+
phone interview: two sum and basic java knowledge
SQL question to find max salary in each department from employee table.
Find number of occurrences of a substring in the given string.
Python, SQL, Scenario based questions on big data
Print out a grade-school multiplication table up to 12x12 (Should be aligned)
Tell me about yourself
4 rounds of interviews: 1)Technical test was hosted on Hacker earth. 2) HR 3) Hiring Manager 4) Co Founder assess "cultural fit" (Are you willing to work like a donkey for the company)
How do you look at critical reviews of your work or other's people work ?
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