Rajasthan Technical Education Second Year Paper 2016 Digital Electronics

Rajasthan Technical Education Second Year Paper 2016 Digital Electronics

Number of digits used in binary system
(a) 2
(b) 8
(c) 10
(d) 16

Among the following R-S flip flop is
(a) Combinational circuit
(b) Syndronous sequential circuit
(c) One bit memory cell
(d) Counter

An OR gate in a positive logic system becomes in a negative logic system
(a) NOT gate
(b) EX-OR gate
(c) AND gate
(d) EX- NOR gate

Using a common pull up resistor with open collector devices is called
(a) Active pull up
(b) Passive pull up
(c) Active pull down
(d) Passive pull down

Which logic gate gives output only when all inputs are zero
(a) NOT gate
(b) NOR gate
(c) NAND gate
(d) EX-OR gate

By connecting a controlled inverter and full adder, we can build
(a) Adder-subtractor
(b) Multiplexer
(c) De-multiplexer
(d) Encoder

In a serial shift register to shift n bits how many clock transitions are rquired ?
(a) n+1
(b) n+2
(c) n
(d) n-1

A unit counter counts
(a) Number of input pulses at its clock input
(b) Number of one’s at its input
(c) Number of ‘0’ at its input
(d) None of the above

A nibble multiplexer selects at the output
(a) A bit of input
(b) A nibble of input
(c) A byte of input
(d) All of the above

When binary is transmitted on transmission line, a one bit error can be checked by which of the following device
(a) Using full adder
(b) Using Parity generator and checker
(c) Using Logic Pulsar
(d) Using encoder

In PAL devices there is
(a) Programmable AND array
(b) Programmable OR array
(c) Fixed NAND array
(d) Fixed NOR array

In a negative logic ‘1’and ‘0’are respectively represented by
(a) 2 V and -5 V
(b) 0 V and -1 V
(c) -1 V and -3 V
(d) -5 V and 0 V