Databricks Certified Data Engineer - Associate

Explanation

Let's analyze each option:

Option A: if day_of_week= 1 and review_period:

• Uses assignment operator = instead of equality operator ==
• This would assign the value 1 to day_of_week and always evaluate to True
• Incorrect

Option B: if day_of_week=1 and review period =."True":

• Uses assignment operator = instead of equality operator ==
• Has syntax errors with review period (should be review_period)
• Uses incorrect syntax =."True"
• Incorrect

Option C: if day_of_week==1 and review_period=="True":

• Correctly uses == for comparison with day_of_week
• However, compares review_period to string "True" instead of boolean True
• In Python, True is a boolean literal, not a string
• Incorrect

Option D: if day_of_week==1 and review_period:

• Correctly uses == for numerical comparison
• Correctly checks review_period as a boolean (evaluates to True if review_period is True)
• This is the correct syntax

Option E: if day_of_week= 1 & review period:= "True":

• Uses assignment operator = instead of equality operator ==
• Uses bitwise AND & instead of logical AND and
• Uses walrus operator := incorrectly
• Has syntax errors with review period (should be review_period)
• Incorrect

Key Points:

1. Equality operator: Use == for comparison, not = (which is assignment)
2. Boolean checking: For boolean variables, simply using the variable name in a condition checks if it's True
3. Logical operators: Use and for logical AND, not & (which is bitwise AND)
4. Python boolean literals: True and False are boolean literals, not strings

Correct Answer: D