Which of the following statements is correct ?

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Submitted by examrobotsa on

Q: 118 (RAS/2013)

Which of the following statements is correct ?
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question_subject: 

History

question_exam: 

RAS

stats: 

0,36,6,2,2,2,36

keywords: 

{'modem': [0, 0, 0, 2], 'digital signal': [0, 0, 0, 2], 'analog signal': [0, 0, 0, 2], 'operating system': [0, 0, 0, 2], 'software': [0, 1, 1, 5]}