The probability that a single bit will be in error on a typical public telephone

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Question
The probability that a single bit will be in error on a typical public telephone line using 4800 bps modem is 10 to the power -3. If no error detection mechanism is used, the residual error rate for a communication line using 9-bit frames is approximately equal to
Options
A. 0.003
B. 0.009
C. 0.991
D. 0.999
E. None of the above

Correct Answer

0.009

2. Which of the following is most responsible for the inability of auditors to uncover computer crimes?
Options
A. the auditor's lack of knowledge in computer technology
B. the prohibitively expensive audit procedures needed to detect computer frauds
C. the client's concern that the public will learn of the crime
D. the relatively small average take of computer frauds
E. None of the above

4. The combination of the top-down and the bottom-up approach may be referred to as an:
Options
A. interactive approach
B. interpretive approach
C. integrative approach
D. All of the above
E. None of the above

7. Which of the following statement is correct?
Options
A. A spin stabilized satellite used solar cells mounted on a cylinder body that continuously rotates so that 40 a time and it also uses gyroscopic action of a spinning satellite to maintain its orientation towards the earth and the sun.
B. A spin stabilized satellite uses solar panels whose cells are continually oriented toward the sun
C. Satellite transponders use lower frequency reception of radiation from earth stations and higher frequency for transmission to earth stations.
D. satellite transponders use a single frequency for reception and transmission from one point on earth to another
E. None of the above

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