[Solved] Which scenario best demonstrates the use of the Null Object pattern? - Ans: Returning a special object instead of null to avoid conditional checks. | LLD

LLD - Behavioral Design Patterns — Part 2

Which scenario best demonstrates the use of the Null Object pattern?

AThrowing an exception when a null value is encountered.

BReturning a special object instead of null to avoid conditional checks.

CLogging an error message when a null is found.

DUsing a global variable to store null values.

Step-by-Step Solution

Solution:

Step 1: Identify what Null Object pattern does
It returns a special object that behaves safely instead of returning null.
Step 2: Compare options
Throwing exceptions or logging errors are error handling, not Null Object usage. Using global variables for null is unrelated.
Final Answer:
Returning a special object instead of null to avoid conditional checks. -> Option B
Quick Check:
Null Object usage = Return special object [OK]

Quick Trick: Null Object returns safe object, not null [OK]

Common Mistakes:

MISTAKES

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Which scenario best demonstrates the use of the Null Object pattern?