C Sharp (C#) - Polymorphism and Abstract Classes
Which of the following is the correct way to check if
obj is a bool and assign it to b?Which of the following is the correct way to check if obj is a bool and assign it to b?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Understand pattern matching syntax
The correct syntax to check type and assign isif (obj is Type variable).Step 2: Analyze options
if (obj is bool b) uses the correct pattern matching syntax forbool. if (obj as bool b) uses invalid syntax withas. if (obj == bool b) is syntactically incorrect. if (obj is bool) checks type but does not assign.Final Answer:
if (obj is bool b) -> Option DQuick Check:
Pattern matching withisand variable assignment [OK]
Quick Trick: Use 'is Type variable' for type check and assignment [OK]
Common Mistakes:
MISTAKES- Using 'as' keyword incorrectly for pattern matching
- Checking type without variable assignment
- Using equality operator for type check
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