========================================================================= Date: 04-29-89 (11:16) Number: 457 Comp-U-Ease To: ALL Refer#: NONE From: PHIL MARCELLO Read: NO Subj: DC COURSE TEST PART 1 Conf: (6) TeleComm ------------------------------------------------------------------------ Data Comm Test - Instructions : Please provide the MORE correct answer to each question by filling in the blank or selecting from 2 or more answers. Send your Response to me via R/O. Thankyou. 1. A DATA WORD is made up of Data A. Bits B. Bytes C. Blocks D. Letters -------------------------------------------------------- 2. The ODD Parity Bit for 1011010 is a _____ -------------------------------------------------------- 3. If you received the following Data Word 1101 0000 You have received in ASCII the letter ______ -------------------------------------------------------- 4. The speed of a Parallel Interface is limited to A. Speed of the CPU B. Speed of the Interface Clock C. Access time of the Hard Drive D. Preselected Baud Rate -------------------------------------------------------- 5. Start and Stop Bits are primarily used in Synchronous Communication. True or False -------------------------------------------------------- 6. At 2400 bps , a Bit Length would be how long ? -------------------------------------------------------- 7. A Data Block can be no longer than A. 1024 characters B. 1024 Data Bits C. 1024 Clocks D. A Data Block can be almost any size --------------------------------------------------------- 8. A CRC Character checks the integrity of A. Parity B. The whole Data Block preceeding it C. The Control signals D. Voltage Levels ------------------------------------------------------------ 9. The UART is a device for A. Converting Serial to Parallel Data B. Converting Parallel to Serial Data C. Converting Async to Sync Data Blocks D. Converting Sync to Bi Sync E. A & B above ------------------------------------------------------------ For the Following Questions, select your answers as A. The Modem B. The Phone Lines C. The Computer D. None 10. You can not communicate. You see the LED's on your Modem. DSR (MR) is on. DTR (TR) is OFF. The problem most likely is (A,B,C or D) 11. You can not communicate. You see the LED's on your Modem. DSR (MR) is OFF. DTR (TR) is ON. The problem most likely is (A,B,C or D) 12. You can not communicate. You see the LED's on your modem. DSR (MR) is on. DTR (TR) is on. RTS (RS) is on. CTS (CS)is Off. The problem most likely is (A,B,C or D) 13. You have a breakout box looking at your Computer to Modem Interface. You look at the RTS (RS) signal. It Reads 1.5 Volts. You break the connection between the computer and the modem for the RS signal only; Leaving all the other signals connected. You look at RS on the Computer side and see 1.5 volts. You look at the RS signal on the Modem side and see 1.5 Volts. The problem most likely is (A,B,C or D) NOTE: I did not cover the material the properly let you answer question number 13. I will cover when we go over the test. Take a guess and EXPLAIN you answer if you can. ----------------------------------------------------------------------- 14. Is it OK to Locate your Modem 100 feet away from your Computer. Yes or No (if no explain) ----------------------------------------------------------------------- 15. Is it OK to run your Parallel Interface cable to your printer that is 50 Feet away. (Yes or No) (If No explain) ----------------------------------------------------------------------- 16. If we Modulate our signal at 4 bits per baud at a Baud rate of 600 Baud, what is our BPS rate. ----------------------------------------------------------------------- 17. If your modem is transmitting at 500 milli volts, peak to peak What is the DB level of your transmitter. ----------------------------------------------------------------------- Well I think that will do for now. It will give me a chance to see how you are doing. Got any questions for ME ????