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Power Bi data modelling test questions

Quiz by Support - BusinessPromoted .com

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20 questions
Show answers
  • Q1
    1. What is a primary function of data modeling in Power BI?
    To improve data entry speed
    To structure data for easier analysis
    To increase data storage
    To simplify programming tasks
    30s
  • Q2
    2. Which type of relationship is commonly used between fact and dimension tables in a star schema?
    All-to-all
    Many-to-many
    One-to-many
    One-to-one
    30s
  • Q3
    3. What does DAX stand for?
    Data Analysis Expressions
    Data Analytics Extensions
    Direct Access XML
    Data Access Express
    30s
  • Q4
    4. Which DAX function is used to calculate a running total?
    ACCUMULATE
    CUMULATE
    TOTAL
    SUM
    30s
  • Q5
    5. What is the best practice for handling a large dimension table in Power BI?
    Creating aggregations
    Using a flat file format
    Splitting into multiple tables
    Removing non-essential columns
    30s
  • Q6
    6. In a star schema, what role do dimension tables play?
    Logging changes over time
    Describing attributes of business entities
    Storing transactional data
    Aggregating metrics
    30s
  • Q7
    7. What is the significance of a snowflake schema?
    Flat data architecture
    Denormalized form of a star schema
    Normalized form of a star schema to reduce redundancy
    Unstructured data format
    30s
  • Q8
    8. Which function in DAX is used to retrieve the last non-empty value in a column?
    LAST
    LASTNONBLANK
    LASTVALUE
    END
    30s
  • Q9
    9. How do you improve query performance on a large dataset in Power BI?
    Reducing the number of visuals
    Creating indexes on columns
    Storing data in a single table
    Increasing the refresh rate
    30s
  • Q10
    10. Which of the following is not a type of filter in Power BI?
    Document level filter
    Page level filter
    Report level filter
    Visual level filter
    30s
  • Q11
    11. What is the purpose of the RELATED function in DAX?
    To duplicate records
    To perform calculations within a table
    To fetch related data from another table
    To check data validity
    30s
  • Q12
    12. How is data security typically implemented in Power BI?
    Firewall settings
    Data masking
    Column encryption
    Row-level security
    30s
  • Q13
    13. What role does a 'Date' dimension table play in a data model?
    It provides context for trend analysis
    Records time stamps of data entries
    Stores actual transaction dates only
    Calculates fiscal years
    30s
  • Q14
    14. What is the primary benefit of using a many-to-many relationship in Power BI?
    It allows linking tables without a single unique key
    Improves data load time
    Simplifies the data model
    Reduces the need for DAX formulas
    30s
  • Q15
    15. Which DAX function is crucial for creating calculated columns?
    DIVIDE
    MULTIPLY
    SUM
    CALCULATE
    30s

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