# Looker Studio (Google Data Studio) (Data Analytics) > Data sources, calculated fields, filters, parameters, blending, interactive charts, sharing - 20 interview questions - Mid-Level - [Interview Questions: Data Analytics](https://sharpskill.dev/en/technologies/data-analytics/interview-questions.md) ## 1. What is Looker Studio (formerly Google Data Studio)? **Answer** Looker Studio is a free data visualization tool from Google that allows creating interactive reports and dashboards. It connects to numerous data sources (Google Analytics, BigQuery, Google Sheets, etc.) and enables easy report sharing with teams. ## 2. What is the difference between a data source and a connector in Looker Studio? **Answer** A connector is the technical link to an external system type (BigQuery, Google Sheets, MySQL). A data source is a configured instance of that connector with specific parameters (which table, which fields). Multiple data sources can use the same connector. ## 3. What types of native connectors does Looker Studio offer? **Answer** Looker Studio offers native Google connectors (Analytics, BigQuery, Sheets, Ads, Search Console) and third-party connectors via the partner connector gallery. Native Google connectors are free and optimized, while some partner connectors may be paid. ## 17 more questions available - How to create a calculated field in Looker Studio? - What is the correct syntax to create a calculated field that categorizes sales as 'Small', 'Medium' or 'Large' based on amount? 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