LLD - Advanced LLD Concepts
Which of the following is the correct syntax to register an event handler in a typical event-driven system?
Which of the following is the correct syntax to register an event handler in a typical event-driven system?
easy🧠 Conceptual Q3 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand event handler registration
Common pattern is to use an 'on' method with event name and handler function.Step 2: Check syntax correctness
eventSystem.on('click', handleClick) uses correct method call with event name and function reference.Final Answer:
eventSystem.on('click', handleClick) -> Option AQuick Check:
Correct syntax = on(event, handler) [OK]
Quick Trick: Use on(event, handler) to register events [OK]
Common Mistakes:
MISTAKES- Calling handler instead of passing reference
- Assigning handler to event property
- Using incorrect method names
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