USHA International Data Analyst Interview Questions and Answers

I rate myself 8/10 in Advanced Excel and 9/10 in SQL.

• Advanced Excel: proficient in pivot tables, VLOOKUP, macros, and data visualization

• SQL: skilled in writing complex queries, joins, subqueries, and stored procedures

• Experience in using Excel and SQL together to analyze large datasets

To work with dynamic data, remove duplicates and fix errors, use data cleaning techniques.

• Use software tools like OpenRefine or Excel to clean data

• Identify and remove duplicate data using unique identifiers

• Fix errors by standardizing data formats and using regular expressions

• Use data validation to ensure accuracy and completeness

• Create a data cleaning plan and document all changes made

• Test the cleaned data to ensure it

Formula is a mathematical expression while function is a pre-built formula that performs a specific task.

• Formula is a combination of mathematical operators and values used to calculate a result.

• Function is a pre-built formula that performs a specific task, such as finding the average of a range of numbers.

• Formulas can be customized and modified, while functions are fixed and cannot be changed.

• Examples of functions incl