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191

Figure 1 above is a logic gate. Use it to answer questions 12 to 14.

Figure 1 represents?   

 

 

 

  • A.  a NOT gate.     
  • B.   a NAND gate
  • C. an AND gate     
  • D. an OR gate.
View Answer & Discuss (13) WAEC 2015
192

X, Y and Z respectively, represents?   

  • A.  input, output and input signals.   
  • B.  output, output and input signals     
  • C.   output, input and output signals.     
  • D.  input, input and output signals.
View Answer & Discuss (8) WAEC 2015
193

Use the Logic gate above to answer this question.

When signals X= 0 and Y= 1, signal Z is?     

  • A. 0.1   
  • B. 0    
  • C. 1      
  • D. 0+1
View Answer & Discuss (3) WAEC 2015
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194

The memory unit of the computer belongs to the?  

  • A. control unit     
  • B.  input device      
  • C. output device     
  • D. system unit
View Answer & Discuss (4) WAEC 2015
195

Which of the following is not a function of the operating system?          

  • A. Analysis of the computer components.     
  • B. Ensuring the proper functioning of hardware.                    .
  • C. Maintenance of directories in external storage.          
  • D. Opening and closing files.
View Answer & Discuss (4) WAEC 2015
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