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posted on 15 Apr 2024
I applied via Naukri.com and was interviewed before Apr 2023. There was 1 interview round.
Lookup is used to search for a specific value in a dataset, join is used to combine two datasets based on a common key, and merge is used to combine datasets based on common columns.
Lookup is used to find a specific value in a dataset
Join is used to combine two datasets based on a common key
Merge is used to combine datasets based on common columns
Example: Lookup - searching for a customer's email address in a customer ...
posted on 17 Oct 2023
I applied via Naukri.com and was interviewed before Oct 2022. There were 4 interview rounds.
posted on 16 Jul 2024
I applied via Company Website and was interviewed in Jun 2024. There were 3 interview rounds.
P value is a statistical measure that helps determine the significance of results in hypothesis testing.
P value is the probability of obtaining results as extreme as the observed results, assuming the null hypothesis is true.
A small P value (typically ≤ 0.05) indicates strong evidence against the null hypothesis, leading to its rejection.
A large P value (> 0.05) suggests weak evidence against the null hypothesis, leadi...
Write a code to reverse a list. Write a code to add value to a dataframe and edit the value in data frame
posted on 10 Aug 2024
I applied via Job Portal and was interviewed before Aug 2023. There were 2 interview rounds.
posted on 23 Feb 2022
I applied via Recruitment Consulltant and was interviewed in Aug 2021. There were 3 interview rounds.
posted on 20 Apr 2021
I applied via LinkedIn and was interviewed in Mar 2021. There were 5 interview rounds.
posted on 24 May 2021
Data can be extracted from various sources like databases, APIs, flat files, etc. and transformed using ETL tools before loading into BI.
Identify data sources and their accessibility
Choose appropriate ETL tool for data extraction and transformation
Design data model and schema for BI
Load data into BI using ETL tool
Validate and verify data accuracy and completeness
I applied via Recruitment Consultant and was interviewed before Nov 2020. There were 3 interview rounds.
Data migration is the process of transferring data from one system to another. It should be done when upgrading or changing systems.
Identify the data to be migrated
Determine the target system and format
Develop a migration plan and timeline
Test the migration process
Execute the migration and verify data integrity
posted on 17 Jul 2024
based on 3 reviews
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