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Building a data pipeline involves extracting, transforming, and loading data from various sources to a destination for analysis.
Identify data sources and determine the data to be collected
Extract data from sources using tools like Apache NiFi or Apache Kafka
Transform data using tools like Apache Spark or Python scripts
Load data into a destination such as a data warehouse or database
Schedule and automate the pipeline fo...
I was interviewed in Mar 2017.
I believe the recruiting process is thorough and well-organized.
The company uses a combination of resume screening, interviews, and assessments to evaluate candidates.
They have a clear timeline for the hiring process and keep candidates informed of their progress.
Feedback is provided to candidates after interviews to help them improve for future opportunities.
I applied via Naukri.com and was interviewed in Sep 2022. There were 3 interview rounds.
SQL test has been conducted nearer to 12-15 questions.
I applied via Campus Placement and was interviewed in Mar 2024. There were 2 interview rounds.
60 minutes 60 questions
I applied via Campus Placement and was interviewed in Nov 2023. There were 2 interview rounds.
It was a 3 hour test with 144 questions
I applied via Campus Placement and was interviewed in Jul 2023. There were 5 interview rounds.
Multiple sections on cognitive ability, quant and logical reasoning.
1 coding question
Easy
50% went to next round
UNION combines and removes duplicates, UNION ALL combines without removing duplicates.
UNION merges the results of two or more SELECT statements and removes duplicates.
UNION ALL merges the results of two or more SELECT statements without removing duplicates.
UNION is slower as it has to remove duplicates, while UNION ALL is faster.
Example: SELECT column1 FROM table1 UNION SELECT column1 FROM table2;
Example: SELECT column...
SQL commands include SELECT, INSERT, UPDATE, DELETE, CREATE, and DROP.
SELECT: retrieves data from a database
INSERT: adds new records to a table
UPDATE: modifies existing records in a table
DELETE: removes records from a table
CREATE: creates a new table, view, or index
DROP: deletes a table or index
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