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Data Modeling Quiz Questions

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20 questions
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  • Q1
    What is the primary purpose of data modeling in Power BI?
    To simplify programming tasks
    To structure data for analysis
    To increase data storage
    To improve data entry speed
  • Q2
    Which type of relationship is most commonly used in Power BI data models?
  • Q3
    What is a Star Schema in data modeling?
    A schema where all tables are related in a circular manner
    A method to create hierarchical data models
    A type of database schema that uses one fact table and several dimension tables
    A way to store unstructured data
  • Q4
    What is a primary key in data modeling?
    A unique identifier for a record in a table
    A key that can be duplicated across tables
    A key used only for creating relationships
    A non-unique identifier for a record
  • Q5
    What is the benefit of using a Snowflake Schema over a Star Schema?
    Increases query performance
    Reduces data redundancy
    Requires fewer tables
    Simplifies the schema design
  • Q6
    Which DAX function is used to create calculated columns?
  • Q7
    What is the role of a fact table in a data model?
    Stores quantitative data for analysis
    Stores user information
    Stores dimensional data
    Stores metadata
  • Q8
    Which of the following is a best practice for handling many-to-many relationships in Power BI?
    Create a direct relationship
    Use calculated columns
    Avoid relationships
    Use a bridging table
  • Q9
    What does the RELATEDTABLE() function do in DAX?
    Joins two tables
    Calculates the total for a related table
    Filters data in a related table
    Returns a table related to the current table
  • Q10
    What is the purpose of using hierarchies in Power BI?
    To enable drill-down capabilities
    To store metadata
    To avoid data redundancy
    To create flat data structures
  • Q11
    How does Power BI handle circular dependencies in data models?
    It resolves them automatically
    It does not allow them
    It ignores them
    It combines the tables
  • Q12
    What is the use of calculated tables in Power BI?
    To create relationships
    To store raw data
    To import data from external sources
    To create new tables based on DAX formulas
  • Q13
    What is the primary advantage of using DirectQuery mode in Power BI?
    Reduced storage requirements
    Simplified data modeling
    Faster query performance
    Real-time data updates
  • Q14
    What is the role of dimension tables in a data model?
    To store descriptive attributes related to fact data
    To store quantitative data
    To create calculated columns
    To manage user permissions
  • Q15
    Which of the following is a characteristic of a good data model?
    Complex relationships
    Minimal indexing
    High data integrity
    High data redundancy

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