Computer Aptitude Questions Set – 1

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Welcome to Online Computer Aptitude Quiz Section based on New Pattern in AffairsCloud.com. Here we are creating quiz based on Number System conversion for SBI/IBPS Exams.

1. Convert the given Decimal number into Binary form – 175
   1.10001111₂
   2.11111010₂
   3.11101011₂
   4.10101111₂
   5.None of these
   
   Answer & Explanation

   Answer – 4.10101111₂
   Explanation :
   Divide the number by Short division with 2 then note down the remainder one by one. Then write it down from LSB(Least significant bit ) to MSB(Most significant bit )
   175/2 = Remainder 1
   87/2 = Remainder 1
   43/2 = Remainder 1
   21/2 = Remainder 1
   10/2 = Remainder 0
   5/2 = Remainder 1
   2/2 = Remainder 0
   1/2= Remainder 1
   175₁₀ = 10101111₂
   
   
   
2. Convert the given Binary number into Decimal form – 100111₂
   1.39
   2.71
   3.27
   4.16
   5.None of these
   
   Answer & Explanation

   Answer – 1.39
   Explanation :
   100111₂
   2⁵+ 0+ 0+ 2²+ 2¹+ 2⁰
   32+0+0+4+2+1 = 39
   
   
   
3. Convert the given Decimal number into Octal form  – 125
   1.140₈
   2.175₈
   3.125₈
   4.120₈
   5.None of these
   
   Answer & Explanation

   Answer – 2.175₈
   Explanation :
   125/8 = Remainder = 5
   15/8 = Remainder = 7
   1
   
   
   
4. Convert the given Base 10 into Base 16 – 210
   1.2D₁₆
   2.213₁₆
   3.D2₁₆
   4.132₁₆
   5.None of these
   
   Answer & Explanation

   Answer – 3.D2₁₆
   Explanation :
   210/16 = Remainder 2
   13 =>D(A=10, B=11, C=12, D=13)
   
   
   
5. Convert the given Binary number into Octal number 1100110
   1.160₈
   2.164₈
   3.140₈
   4.146₈
   5.None of these
   
   Answer & Explanation

   Answer – 4. 146₈
   Explanation :
   001 /100 /110
   1/4/6
   1100110 = 146₈
   
   
   
6. Convert the given Binary number into Hexadecimal Number 1100110
   1.44₁₆
   2.88₁₆
   3.22₁₆
   4.66₁₆
   5.None of these
   
   Answer & Explanation

   Answer – 4.66₁₆
   Explanation :
   0110/0110
   6/6 = 66
   
   
   
7. What will be the one’s complement of decimal number 33 ?
   1.110011
   2.100001
   3.011110
   4.001101
   5.None of these
   
   Answer & Explanation

   Answer – 3.011110
   Explanation :
   100001=32+0+0+0+0+1 =33
   100001 => 011110
   
   
   
8. What will be the one’s complement of 010010₂ ?
   1.101111
   2.101101
   3.100100
   4.110101
   5.None of these
   
   Answer & Explanation

   Answer – 2.101101
   Explanation :
   Just replace 0 by 1 & 1 by 0
   010010 = 101101
   
   
   
9. Find the 2’s complement of 010010₂?
   1.100100
   2.101101
   3.101100
   4.101110
   5.None of these
   
   Answer & Explanation

   Answer – 4.101110
   Explanation :
   010010 = 101101
   (1+0 or 0+1 =1 and 1+1 =10)
   101101
   1 (+)
   —————-
   101110
   —————-
   
   
   
10. Convert the given Hexadecimal into Decimal number(Base 10) – CB2
    1.25₁₀
    2.1211₁₀
    3.3250₁₀
    4.1250₁₀
    5.None of these
    
    Answer & Explanation

    Answer – 3.3250₁₀
    Explanation :
    CB2 => 12 11 2
    12*16² + 11*16¹+ 2*16⁰
    3072+176+2 = 3250₁₀