20 Interview Questions for Data Analyst Role📊💡
1. Question: What is the difference between Data Mining and Data Analysis? Answer: Data Mining involves discovering patterns in large datasets using methods from machine learning and statistical modeling. Data Analysis, on the other hand, focuses on inspecting, cleaning, and transforming data to extract meaningful insights. 2. Question: What is the importance of data cleaning in analysis? Answer: Data cleaning is crucial as it ensures data quality and reliability. It removes inaccuracies and inconsistencies, improving the accuracy and reliability of the analysis results. 3. Question: Explain the term 'Data Normalization'. Answer: Data normalization is the process of transforming data into a common scale, usually to bring all the data points into a similar range. This is particularly important for algorithms that are sensitive to the scale of the variables. 4. Question: What is a 'Pivot Table'? Answer: A pivot table is a data summarization tool in spreadsheet programs....