WorksheetsDigital Electronics
Total questions: 30
Worksheet time: 15mins
Convert the binary number 01011 into decimal
10
11
13
12
What is the radix of hexadecimal number?
15
10
16
2
Which bit has the highest weightage?
MSB
LSB
Middle most bit
none
The number 15 is represented as ............in Hexadecimal.
C
E
F
D
Which logic gate is this?
AND
OR
XOR
NOT
Which among the following is a combinational circuit
Flip Flop
Latch
Counter
Encoder
Full Adder can be formed by cascading two half adders
True
False
The combinational circuit used for routing the input value to the output line based on the select signal combination
Multiplexer
Demultiplexer
Encoder
Decoder
Which among the following is the BCD representation of the decimal number 12
1100
0001 0010
1101
0001 0011
Which flip flop is used for designing counters
T flip flop
SR flip flop
D flip flop
T latch
A T flip flop can be obtained by shorting the input lines of:
SR Flip Flop
D Flip Flop
JK Flip Flop
RS Latch
The excess-3 code of 0010
0101
0011
0100
0110
Which among the following gates is an inequality detector
XOR Gate
XNOR Gate
NAND Gate
NOR Gate
Minterms are:
Sum of Products
Product of Sums
Cannot be determined
Which are the UNIVERSAL GATES?
XOR Gate & NOT Gate
AND Gate & OR Gate
NAND Gate & NOR Gate
All of the above
NAND Gate is called a universal logic element, because
It is used by everybody
Any logic function can be realised by NAND Gate alone
Many digital computers use NAND Gate
All the minimisation techniques are applicable to optimum NAND Gate realisation
Which is the correct order of sequence for representing input values in K-map?
(00,01,10,11)
(00,10,01,11)
(00,01,11,10)
(00,10,11,01)
5) The Boolean expression for a 3-input AND gate is ________.
A )X = AB
B) X = ABC
C) X = A + B + C
D) X = AB + C
Sequencing elements are
Latches
Flip flops
Shift registers
Both A&B
clocked sequential circuits are
Two phase overlapping clock
Two phase non overlapping clock
Four phase overlapping clock
Four phase non overlapping clock
Sequential circuit includes
only Delays
Only Feed backs
Delays and Feed backs from input to output
Delays and Feed backs from output to input
Maximum delay after which all outputs are stable once input changes
Propagation delay
contamination delay
What type of register would shift a complete binary number in one bit at a time and shift all the stored bits out one bit at a time?
PISO
SISO
PIPO
SIPO
…………………….. Logic circuits depends upon both the input as well as the previous output of the circuit
(a)
Latches and Flip flops are the examples of …………………. Logic circuits
Combinational
Sequential
Sequential circuits are faster than combinational circuit say True or False
True
False
