Sunknowledge Services Data Analyst Interview Questions and Answers

Window functions like lag and lead are used to analyze data over a specific range or window.

• Lag function can be used to calculate the difference between current and previous values in a time series data.

• Lead function can be used to calculate the difference between current and future values in a time series data.

• Window functions can be used to calculate moving averages, cumulative sums, and other statistical measures.

• Fo...read more

Data management involves organizing, storing, protecting, and maintaining data to ensure its accuracy and accessibility.

• Identify the type of data and its source

• Establish a data governance framework

• Implement data security measures

• Use data management tools and software

• Regularly backup and archive data

• Ensure compliance with data regulations

• Monitor data quality and integrity

• Provide access to authorized users only

Data analytics is the process of examining data sets to draw conclusions about the information they contain.

• It involves collecting, cleaning, and transforming data

• Applying statistical and mathematical models to analyze the data

• Visualizing and presenting the results in a meaningful way

• Examples include predicting customer behavior, identifying trends, and optimizing business processes

Analytics helps us make data-driven decisions and improve business outcomes.

• Analytics provides insights into customer behavior and preferences.

• It helps identify trends and patterns in data that can be used to optimize business processes.

• Analytics can also be used to measure the effectiveness of marketing campaigns and other initiatives.

• It enables businesses to make data-driven decisions that lead to improved outcomes a...read more