Computer Aptitude Questions Set – 2

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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. If ∆ represents ‘0’ and ○ represents ‘1’. What will be the one’s complement of  ∆○∆∆○○? 
   1.101100
   2.010011
   3.100110
   4.001100
   5.None of these
   

   Answer & Explanation

   Answer – 1.101100
   Explanation :
   ∆○∆∆○○ => 010011
   010011 1’s complement is 101100
   
   
   
2. represents which of the following logic gate ?
   1.AND
   2.OR
   3.NOT
   4.NOR
   5.None of these
   

   Answer & Explanation

   Answer – 1.AND
   Explanation :
   AND Gate is a Boolean operator which gives the value one if and only if all the operands are one, and otherwise has a value of zero.
   
   
   
3. Which Boolean operator will operate with only one variable ?
   1.NOT
   2.NAND
   3.NOR
   4.Exclusive NOR
   5.None of these
   

   Answer & Explanation

   Answer – 1.NOT
   Explanation :
   NOT is a Boolean operator with only one variable that has the value one when the variable is zero and vice versa.
   
   
   
4. represent ________________
   1.AND Gate
   2.OR Gate
   3.NOT Gate
   4.NOR Gate
   5.None of these
   

   Answer & Explanation

   Answer – 2.OR Gate
   Explanation :
   A Logic OR Gate or Inclusive-OR gate is a type of digital logic gate that has an output which is normally at logic level “0” and only goes “HIGH” to a logic level “1”
   
   
   
5. Triangle represents ∆ (0) and circle represents o (1). If triangle appears in unit’s place then its value is 1. If it appears in 10’s place its value is doubled to 2 like that it continues. Using the given terminology answer the following questions. For example: 
   How will you represent ‘102’ in this code language?
   1.oo∆∆ooo
   2.oo∆∆o∆∆
   3.∆o∆oo∆o
   4.oo∆∆oo∆
   5.None of these
   

   Answer & Explanation

   Answer – 4.oo∆∆oo∆
   Explanation :

   128	64	32	16	8	4	2	1
   	1	1	0	0	1	1	0

   
   
6. The code ∆∆o∆o∆∆ represents
   1.26
   2.12
   3.20
   4.16
   5.None of these
   

   Answer & Explanation

   Answer – 3.20
   Explanation :
   ∆∆o∆o∆∆ => 0010100
   16+0+4+0+0=20
   
   
   
7. Hexadecimal is a positional numeral system with a radix
   1.8
   2.2
   3.10
   4.16
   5.None of these
   

   Answer & Explanation

   Answer – 4.16
   Explanation :
   In mathematics and computing, hexadecimal (also base 16, or hex) is a positional numeral system with a radix, or base, of 16. It uses sixteen distinct symbols, most often the symbols 0–9 to represent values zero to nine, and A, B, C, D, E, F (or alternatively a, b, c, d, e, f) to represent values ten to fifteen.
   
   
   
8. Which among the following is an appropriate Octal conversion for  10101001 ?
   1.125
   2.152
   3.251
   4.521
   5.None of these
   

   Answer & Explanation

   Answer – 3.251
   Explanation :
   010 = 2
   101  = 5
   001 =1
   10101001 = 251
   
   
   
9. If P and Q are the inputs, then output X = P+Q is the output of
   1.NOR
   2.NAND
   3.AND
   4.OR
   5.None of these
   

   Answer & Explanation

   Answer – 4.OR
   Explanation :
   A =1, B= 0
   Then y =1+0 = 1
   
   
   
10. If A and B are the inputs, then output Y = A.B is the output of which logical operator ?
    1.NOT
    2.NAND
    3.NOR
    4.AND
    5.None of these
    

    Answer & Explanation

    Answer – 4.AND
    Explanation :
    A =1, B= 0
    Then y =1.0 = 0