 
			 
			MCQOPTIONS
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				| 1. | The length of the shortest string NOT in the language (over Σ = {a, b}) of the following regular expression is _____________a*b*(ba)*a* | 
| A. | 2 | 
| B. | 3 | 
| C. | 4 | 
| D. | 5 | 
| Answer» C. 4 | |