 
			 
			MCQOPTIONS
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				| 1. | In the signal flow diagram given in the figure, \({u_1}\;and\;{u_2}\) are possible inputs whereas \({y_1}\;and\;{y_2}\) are possible output. When would the SISO system derived from this diagram be controllable and observable? | 
| A. | When \({u_1}\) is the only input and \({y_1}\) is the only output | 
| B. | When \({u_2}\) is the only input and \({y_1}\) is the only output | 
| C. | When \({u_1}\) is the only input and \({y_2}\) is the only output | 
| D. | When \({u_2}\) is the only input and \({y_2}\) is the only output | 
| Answer» C. When \({u_1}\) is the only input and \({y_2}\) is the only output | |