Que. 1 A divide by 78 counter can be realized by using
A 6 nos. of mod-13 counters
B 13 nos. of mod-10 counters
C one mod-13 counters followed by one mod-6 counter
D 13nos. and mod-13 counters
Que. 2 Decimal number 5 in level parity self correcting code
A 00101
B 01011
C 01100
D 10000
Que. 3 The resolution of a D/A convertor is approximately 0.4% of its full scale
range.it is
A an 8-bit convertor
B a 10-bit convertor
C a 12-bit convertor
D a 16-bit convertor
Que. 4 The switching speed of ECL is very high,because
A the transistors are switched between cutoff and saturation regions
B the transistors are switched between active and saturation regions
C the transistors are switched between active and cutoff regions
D the transistors may be operated in three regions
Que. 5 _
the logical expression Y=A + AB is equal to
A y=AB
B y=AB
C y=A+B
D y=A+B
Que. 6 Which of the following use least power?
A TTL
B ECL
C CMOS
D all use same power
Que. 7 A system has a word length of 4-bits.If in this system -ve numbers are
represented by their Two's compliment,then the range of numbers that can
be represented by the word length is
A -8 to +8
B -7 to +7
C -16 to +16
D none of these
Que. 8 Hamming codes are used for error dection and correction.if the minimim
hammining distance is m, then the number of errors correctable is
A equal to m
B less than m/2
C equal to 2m
D greater than m
Que. 9 An analog voltage is in the range of 0 to 8v is divided in eight equal
intervals for conversion to 3-bit digital output the maximum quantization
error is
A 0v
B 0.5v
C 1v
D 2v
Que. 10 Dule slop integration type A/D converters provide
A higher speeds compaired to all other types of A/D converters
B very good accuracy without putting extreme requirments on component
stability
C poor rejection of power supply hum
D better resolution compared to all other type of A/D convertors
for the same number ofbits
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