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Currency symbols

 
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Q48
Which are valid identifiers?
1) _class
2) $value$
3) zer@
4) �ngstr
5) 2muchuq
Naturally I selected 1,2.
But correct answers are 1,2,4.
How can any one guess � is a currency symbol? Will there be questions in the main exam like this?
 
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The real exam is not intended to test your familiarity with international currency symbols. It is probably best to regard a question such as that one as a learning experience rather than as a preview of what might be on the real exam.
 
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I think becuase this is from a Chinese Mock I got this question.
 
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