Vcare Call Center Interview Questions and Answers

Time intelligence functions in DAX are used to perform calculations based on dates and times.

• Time intelligence functions help in comparing data over different time periods.

• Functions like TOTALYTD, SAMEPERIODLASTYEAR, and DATESBETWEEN are commonly used for time intelligence.

• They can be used to calculate year-to-date totals, compare values with previous periods, and more.

Calculated columns are columns created in Power BI by using DAX formulas, while measures are calculations based on the data model.

• Calculated columns are static and stored in the data model, while measures are dynamic and calculated on the fly.

• Calculated columns are used for adding new data to a table, while measures are used for aggregating data or performing calculations.

• Examples of calculated columns include adding a new column for profit margin, while measures can be used ...read more

Numerical range parameter is a parameter that defines a range of numerical values for a specific variable or function.

• It is used to specify a range of numerical values that a parameter can take.

• It helps in filtering data based on a specific numerical range.

• For example, a numerical range parameter can be used to filter sales data for products with prices between $50 and $100.

Use DAX function to shift one cell down in a table

• Use the LAG function in DAX to shift values down in a column

• Specify the number of rows to shift as a parameter in the LAG function

• Example: LAG([Column], 1) will shift values in 'Column' down by one row

A field parameter is a variable that is used to pass values to a function or method.

• Field parameters are used to customize the behavior of functions or methods.

• They can be used to filter, sort, or group data in Power BI reports.

• Examples include filtering data based on a specific date range or sorting data by revenue.

Calculate rolling total without resetting at specified interval

• Use DAX formula with functions like CALCULATE, FILTER, and EARLIER

• Create a measure that calculates the running total based on the current and previous rows

• Consider using variables to store intermediate results for efficiency