The snippet that has to be used to check if “a” is not

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The snippet that has to be used to check if “a” is not equal to “null” is _________

1. if(a!==null)
2. if(a!null)
3. if (!a)
4. if(a!=null)
5. None of these

Correct Option: A

A strict comparison (e.g., ===) is only true if the operands are of the same type and the contents match. The more commonly-used abstract comparison (e.g. ==) converts the operands to the same type before making the comparison. The not-equal operator !== compares 0 to null and evaluates to either true or false.