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An index is a data structure that improves the speed of data retrieval operations in a database by allowing quick access to specific data.
Indexes are used to quickly locate data without having to search every row in a database table.
They are created on specific columns in a table to speed up queries that filter or sort by those columns.
Examples of indexes include primary keys, unique keys, and non-unique indexes.
I applied via Referral and was interviewed before Jun 2021. There were 3 interview rounds.
SQL server
SQL DBA
I applied via Walk-in and was interviewed in Apr 2021. There was 1 interview round.
posted on 20 Jan 2025
A data analyst is a professional who collects, processes, and analyzes data to provide insights and support decision-making.
Collects data from various sources
Cleans and processes data to ensure accuracy
Analyzes data using statistical methods and tools
Interprets data to identify trends and patterns
Presents findings and recommendations to stakeholders
To delete duplicates, use SQL query with DISTINCT keyword or remove duplicates programmatically in Python using sets.
Use SQL query with DISTINCT keyword to remove duplicates from a database table
In Python, remove duplicates from a list using sets: list(set(original_list))
For pandas DataFrame, drop duplicates using df.drop_duplicates()
I applied via LinkedIn and was interviewed in Jan 2024. There were 3 interview rounds.
Spark Sql and Spark Scripting
Data Modelling for retail brand like dmart
ETL Pipeline which handles streaming data as well
I applied via Walk-in and was interviewed in Nov 2023. There were 3 interview rounds.
I applied via Campus Placement
Basic apt questions. Can easily practice online
The total number of flowers accumulated at the end of the day can be calculated by multiplying the number of people by the number of flowers each person offers.
Multiply the number of people by 5 to get the total number of flowers accumulated
For example, if there are 10 people, the total number of flowers accumulated would be 10 * 5 = 50
based on 1 interview
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