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You Are On Multi Choice Question Bank SET 1142

57101. The K-map for a Boolean function is shown in figure. The number of essential prime implicants for this function is





57102. When microprocessor processes both positive and negative numbers, the representation used is



57103. An AND gate has four inputs. One of the inputs is low and other inputs are high. The output





57104. In the given figure, the flip flop is





57105. The number of switching functions of 3 variables are





57106. The applications of shift registers are Time delayRing counterSerial to parallel data conversionSerial to serial data conversion Which of the above are correct?





57107. Assertion (A): ECL is fast as compared to TTL.Reason (R): ECL dissipates less power than TTL.





57108. Assertion (A): Synchronous counter has higher speed of operation than ripple counter Reason (R): Synchronous counter uses high speed flip flops.





57109. What will be the maximum conversion time in 6 bit dual slope A/D converter uses a reference of -6v and a 1 MHz clock. It uses a fixed count of 40 (101000).





57110. The modulus of counter in the given figure is





57111. The input to a parity detector is 1001. The output is





57112. A 4 bit modulo 16 ripple counter uses JK flip-flops. If the propagation delay of each FF is 50 ns. The max. clock frequency that can be used is equal to





57113. As the number of flip flops are increased, the total propagation delay of





57114. In a 4 input OR gate, the total number of High outputs for the 16 input states are





57115. For the ring oscillator shown in the figure, the propagation delay of each inverter is 100 pico sec. What is the fundamental frequency of the oscillator output __________





57116. If A is 1011, A" is





57117. Which of the following is not a characteristic of a flip flop?





57118. The number of flip flops needed for a Mod 7 counter are





57119. For AB + A C + BC = AB + A C the dual form is





57120. A DAC has full scale output of 5 V. If accuracy is ± 0.2% the maximum error for an output of 1 V is





57121. Binary number 1101101101 is equal to decimal number





57122. A 16:1 multiplexer has 4 select input lines.



57123. Which one of the following can be used as parallel to series converter?





57124. What will be conversion time of a successive approximation A/D converter which uses 2 MHz clock and 5 bit binary ladder containing 8 V reference.?





57125. A 4 bit down counter can count from





57126. Assertion (A): In computers the data is stored in hexadecimal formReason (R): Hexadecimal representation is short as compared to binary representation.





57127. For the circuit of the given figure, the output equation is





57128. Using 2's complement, the largest positive and negative number which can be stored with 8 bits are





57129. Three Mod-16 counters are connected in cascade. The maximum counting range is





57130. TTL is used in electronic calculators.



57131. Inverter 74 LS04 has following specifications I0H max = - 0.4 mA, I0L max = 8 mA, IIH max = 20 μA, IIL max = 0.1 mA The fan out of this inverter is





57132. A 4 bit ripple counter starts in 0000 state. When the counter reads 0010 the number of clock pulses which have occurred is





57133. The number FF in hexadecimal system is equivalent to number __________ in decimal system.





57134. The inputs A, B, C of the given figure are applied to a 3 input NOR gate. The output is





57135. Assertion (A): XOR gate is not universal gate.Reason (R): It is not possible to realize any Boolean function using XOR gates only.





57136. The number of logic devices required in a Mod-16 synchronous counter are





57137. A 2 bit BCD D/A converter is a weighted resistor type with ER = 1V, R = 1 MΩ and Rf = 10KΩ then Resolution in percent and volt is __________ .





57138. The number of bits in EBCDIC is





57139. The number of memory locations in which 14 address bits can access is





57140. What will be conversion rate for a counter type A/D converter contains a 4 bit binary ladder and a counter driven by a 2 MHz clock. Then conversion time





57141. A 6 bit R-2R ladder D/A converter has a reference voltage of 6.5 V. It meets standard linearity then resolution in percent and volts.





57142. What will be output for decimal input 82?





57143. The circuit of the given figure gives the output Y =




57144. In a 4 bit ripple counter using flip flops with tpd = 40 ns, the maximum frequency can be





57145. What will be FSV in 2 bit BCD D/A converter is a weighted resistor type with ER = 1V, R = 1 MΩ and Rf = 10KΩ





57146. The number of product terms in the minimized sum of product expression obtained through the following K-map, where d, don't care.





57147. BCD equivalent of - 810 is





57148. The number of inputs and outputs in a full adder are





57149. A + A . B =





57150. The device 'one shot' has





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