Digital Electronics And Logic Design Set 1

Computer Science Engineering (CSE),

Electronics and Telecommunication Engineering [ENTC]

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This set of Digital Electronics and Logic Design Multiple Choice Questions & Answers (MCQs) focuses on Digital Electronics And Logic Design Set 1

Q1 | The 2s compliment form (Use 6 bit word) of the number 1010 is
  • 111100
  • 110110
  • 110111
  • 1011
Answer: 110110
Q2 | AB+(A+B)’ is equivalent to
  • a ex-nor b
  • a ex or b
  • (a+b)a
  • (a+b)b
Answer: a ex-nor b
Q3 | The hexadecimal number equivalent to (1762.46)8 is
  • 3f2.89
  • 3f2.98
  • 2f3.89
  • 2f3.98
Answer: 3f2.98
Q4 | A three input NOR gate gives logic high output only when
  • one input is high
  • one input is low
  • two input are low
  • all input are low
Answer: all input are low
Q5 | The absorption law in Boolean algebra say that
  • x + x = x
  • x . y = x
  • x + x . y = x
  • none of the above
Answer: x + x . y = x
Q6 | Logic X-OR operation of (4ACO)H & (B53F)H results
  • aacb
  • 0
  • abcd
  • ffff
Answer: ffff
Q7 | What is decimal equivalent of (11011.1000)2 ?
  • 22
  • 22.2
  • 20.2
  • 27.5
Answer: 27.5
Q8 | The negative numbers in the binary system can be represented by
  • sign magnitude
  • 2\s complement
  • 1\s complement
  • all of the above
Answer: sign magnitude
Q9 | Negative numbers cannot be represented in
  • signed magnitude form
  • 1’s complement form
  • 2’s complement form
  • none of the above
Answer: none of the above
Q10 | The answer of the operation (10111)2*(1110)2 in hex equivalence is
  • 150
  • 241
  • 142
  • 1.01e+08
Answer: 142
Q11 | The Hexadecimal number equivalent of (4057.06)8 is
  • 82f.027
  • 82f.014
  • 82f.937
  • 83f.014
Answer: 82f.014
Q12 | The NAND gate output will be low if the two inputs are
  • 0
  • 1
  • 10
  • 11
Answer: 11
Q13 | A binary digit is called a
  • bit
  • character
  • number
  • byte
Answer: bit
Q14 | What is the binary equivalent of the decimal number 368
  • 101110000
  • 110110000
  • 111010000
  • 1.11e+08
Answer: 101110000
Q15 | What is the binary equivalent of the Octal number 367
  • 11110111
  • 11100111
  • 110001101
  • 101110111
Answer: 11110111
Q16 | What is the binary equivalent of the Hexadecimal number 368
  • 1111101000
  • 1101101000
  • 1101111000
  • 1.11e+09
Answer: 1101101000
Q17 | What is the binary equivalent of the decimal number 1011
  • 1111110111
  • 1111000111
  • 1111110011
  • 1.11e+09
Answer: 1111110011
Q18 | The gray code equivalent of (1011)2 is
  • 1101
  • 1010
  • 1111
  • 1110
Answer: 1110
Q19 | The decimal equivalent of hex number 1A53 is
  • 6793
  • 6739
  • 6973
  • 6379
Answer: 6739
Q20 | ( 734)8 =( )16
  • c 1 d
  • d c 1
  • 1 c d
  • 1 d c
Answer: 1 d c
Q21 | The simplification of the Boolean expression (A'BC')'+ (AB'C)' is
  • 0
  • 1
  • a
  • bc
Answer: 1
Q22 | The hexadecimal number ‘A0’ has the decimal value equivalent to
  • 80
  • 256
  • 100
  • 160
Answer: 160
Q23 | The Boolean expression A.B+ A.B+ A.B is equivalent to
  • a + b
  • a\.b
  • (a + b)\
  • a.b
Answer: a + b
Q24 | The 2’s complement of the number 1101101 is
  • 101110
  • 111110
  • 110010
  • 10011
Answer: 10011
Q25 | When simplified with Boolean Algebra (x + y)(x + z) simplifies to
  • x
  • x + x(y + z)
  • x(1 + yz)
  • x + yz
Answer: x + yz
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