In sequential logic circuit the present values of outputs are dependent on\ i) past values of input \ ii) present values of input \ iii) both present values of the inputs and the past values of inputs\ iv) none of them.\ 2. Which one is the true statement? \ i) When S = R = 0, output is unchanged \ ii) When S = 0, R = 1, then output is 1 \ iii) When S = 1, R = 1, then output is 1 \ iv) When S = 1, R = 0, then output is indeterminate condition\ 3. "Irrespective of the present state it complements when clock pulse occurs". Which one of the \ following is true for the above statement? \ i) T FF \ ii) D FF \ iii) J-K FF \ iv) S-R FF. \ 4. How many flip-flops are required to construct a decade counter?\ i) 10\ ii) 8\ iii) 5\ iv) 4\ 5. Which of the following is an invalid output state for an 8421 BCD counter?\ i) 1110\ ii) 0000\ iii) 0010\ iv) 0001\ Very Short Question Answers\ 1. What do you mean by characteristic equation? Write K-map of S-R FF and cha