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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
- 1. What command is used to display the characteristics of a process?
Options- A. au
- B. ps
- C. du
- D. pid
- E. None of the above Discuss
- 2. Conversion of decimal number 4210 to it's octal number equivalent is
Options- A. 578
- B. 428
- C. 478
- D. 528
- E. None of the above Discuss
- 3. The rate at which scanning is repeated is called the:
Options- A. stroke rate
- B. refresh rate
- C. bandwidth
- D. resolution
- E. None of the above Discuss
- 4. What form of energy is used to maintain an imbalance of charges between the terminals of a battery?
Options- A. Electronical energy
- B. Mechanical energy
- C. Chemical energy
- D. Solar energy
- E. None of the above Discuss
- 5. Which command is used with vi editor to search a pattern in the forward direction?
Options- A. /
- B. ?
- C. //
- D. ??
- E. None of the above Discuss
- 6. A _____ means that one record in a particular record type may be related to more than one record of another record type.
Options- A. One-to-one relationship
- B. One-to-many relationship
- C. Many-to-one relationship
- D. Many-to many relationship
- E. None of the above Discuss
- 7. PCM stands for _____
Options- A. plug-compatible manufacturer
- B. personal computer media
- C. PC-manufacturer
- D. PC-modem
- E. None of the above Discuss
- 8. The command chmod 761 note is equivalent to
Options- A. chmod 167 note
- B. chmod u=rwx, g=rw, o=x note
- C. chmo a =761 note
- D. chmod 4=7, g=6,0 =1 note
- E. None of the above Discuss
- 9. When installing a SCSI CD-ROM drive, you must set the CD-ROM SCSI adapter to:
Options- A. B0007
- B. An unused SCSI address
- C. The same address as the SCSI device before the CD-ROM
- D. SCSI ID=1
- E. None of the above Discuss
- 10. Which of the following commands is used to save the output of the who command in a file named user.lst, as well as display it?
Options- A. who | tee user.lst
- B. who > user.lst
- C. who >> user.lst
- D. who < user.lste
- E. None of the above Discuss
More questions
Correct Answer: ps
Correct Answer: 528
Correct Answer: refresh rate
Correct Answer: Chemical energy
Correct Answer: /
Correct Answer: One-to-many relationship
Correct Answer: plug-compatible manufacturer
Correct Answer: chmod u=rwx, g=rw, o=x note
Correct Answer: An unused SCSI address
Correct Answer: who | tee user.lst
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