Databricks Certified Data Engineer - Associate

Explanation

The correct answer is D because:

1. f-string syntax: The f"" prefix creates an f-string (formatted string literal) in Python, which allows embedding expressions inside string literals using curly braces {}.

2. Proper concatenation: The desired table name format is nyc100_sales_2021, which means:

   • region and store should be concatenated directly without any separator: nyc100
   • Followed by _sales_
   • Followed by year

3. Why other options are incorrect:

   • A: Uses regular string without f-string prefix, so variables won't be evaluated
   • B: Uses f-string but includes + signs which would create nyc+100+_sales_2021 instead of nyc100_sales_2021
   • C: Regular string without f-string prefix, variables won't be evaluated
   • E: Incorrect syntax mixing string concatenation and variable references

4. Testing with example values:

   region = "nyc"
   store = "100"
   year = "2021"
   table_name = f"{region}{store}_sales_{year}"
   print(table_name)  # Output: nyc100_sales_2021
   

   region = "nyc"
   store = "100"
   year = "2021"
   table_name = f"{region}{store}_sales_{year}"
   print(table_name)  # Output: nyc100_sales_2021
   

This approach correctly uses Python's f-string formatting to dynamically create the table name string with the desired format.