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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

Author	Message
Arpita Groupie Joined: 04Jan2007 Online Status: Offline Posts: 73	Topic: Digital Circuits - Sample Qns............. Posted: 13Feb2007 at 5:47pm
	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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