9th Class Computers Science Question Bank

done Introduction to Logic Gates and Number System Total Questions - 10

• question_answer1)
  A binary variable can take values:
  A)
   0 only              done clear
  B)
   1 and 0 done clear
  C)
   0 and 1                        done clear
  D)
   2 only done clear
  E)
   None of these done clear
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• question_answer2)
  Symbol representing AND operation:
  A)
   +                                done clear
  B)
   . done clear
  C)
  -                              done clear
  D)
   / done clear
  E)
   None of these done clear
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• question_answer3)
  Truth table is way of expressing:
  A)
   boo lean function           done clear
  B)
   boo lean Operators done clear
  C)
   boo lean addition           done clear
  D)
   boo lean subtraction done clear
  E)
   None of these done clear
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• question_answer4)
  A Boolean function may be transformed into:
  A)
   logical diagram              done clear
  B)
   logical graph done clear
  C)
   matrix             done clear
  D)
   All of these done clear
  E)
   None of these done clear
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• question_answer5)
  \[X.{{X}^{1}}\] is equal to:
  A)
   1               done clear
  B)
   0 done clear
  C)
   X                                 done clear
  D)
  \[{{X}^{1}}\] done clear
  E)
   None of these done clear
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• question_answer6)
  NOR is a complement of:
  A)
   AND                          done clear
  B)
   OR done clear
  C)
   XOR               done clear
  D)
   Both [a] and [b] done clear
  E)
   None of these done clear
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• question_answer7)
  Steve wants to convert 10111 to decimal number. Which one of the following is the correct conversion?
  A)
   48                                done clear
  B)
   23 done clear
  C)
   29                                done clear
  D)
   3000 done clear
  E)
   None of these done clear
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• question_answer8)
  Find out the one's complement of 1100111?
  A)
   0011000     done clear
  B)
   0011111 done clear
  C)
   1100110                       done clear
  D)
   0100110 done clear
  E)
   None of these done clear
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• question_answer9)
  The hexadecimal number system is based on 16. Which one of the following is an example of hexadecimal number?
  A)
   232G                           done clear
  B)
   137H done clear
  C)
   120AG                         done clear
  D)
   121BC done clear
  E)
   None of these done clear
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• question_answer10)
  Which one of the following is the correct conversion of \[{{64}_{10}}\]?
  A)
   1000000     done clear
  B)
   0000001 done clear
  C)
   1000100                       done clear
  D)
   1111111 done clear
  E)
   None of these done clear
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