Which of the following statements is correct ?

Q: 118 (RAS/2013)

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]}