Data Analytics Quiz Latest Update with Verified Answers

Data Analytics Quiz Latest Update with Verified Answers What is an example of structured data? a) Data stored in a relational database with tables and columns b) Images stored in a digital format c) Text data from social media d) Audio recordings What is the difference between descriptive and predictive analytics? a) Descriptive analytics uses data to make future predictions b) Descriptive analytics summarizes historical data, while predictive analytics forecasts future outcomes c) Descriptive analytics focuses on visualization, while predictive analytics focuses on text analysis d) Descriptive analytics uses machine learning algorithms What does the term "big data" refer to? a) Data that is stored in a small file format 2 b) Data with limited variables c) Data that is large in volume, variety, and velocity d) Data that is easy to analyze What is the role of a data warehouse? a) To store unstructured data b) To create data models c) To centralize and store large amounts of structured data for analysis d) To visualize data What is a key feature of a dashboard in data analytics? a) It stores raw data b) It displays key performance indicators and visualizations for easy monitoring c) It cleans and preprocesses data d) It stores large datasets for analysis What is the purpose of data normalization in analytics? a) To reduce the size of the dataset 3 b) To adjust the scale of data so that it can be analyzed without bias c) To convert data into a textual format d) To visualize the data What is an example of unstructured data? a) Text data from customer reviews b) Data from a SQL database c) Excel spreadsheets with tables d) Data in a CSV format What is the purpose of regression analysis in data analytics? a) To understand relationships between variables and predict outcomes b) To classify data into categories c) To visualize data patterns d) To create time series forecasts What is the primary function of SQL in data analytics? a) To visualize data 4 b) To clean and preprocess data c) To query and manipulate structured data in databases d) To generate reports What is a common tool used for data visualization in analytics? a) Tableau b) RStudio c) Jupyter Notebook d) GitHub What is a key challenge in data analytics?