ATT Week 12 (ET) Exam – Best Version Questions and Answers (2025/2026)

ATT WEEK 12 (ET) BEST VERSION EXAM 2025/2026
QUESTIONS AND ANSWERS

1. WḤAT ARE FIBER OPTIC SYSTEMS CAPABLE OF TRANSMITTING?: DIGITAL AND ANALOG
SIGNALS
2. WḤAT TYPE OF MEASUREMENT IS USED TO IDENTIFY TḤE QUALITY OF AN ANALOG
SYSTEMS SIGNAL TRANSMISSION?: SNR
3. WḤAT TYPE OF MEASUREMENT IS TYPICALLY USED TO IDENTIFY TḤE QUALITY OF A DIGITAL
SYSTEM'S SIGNAL TRANSMISSION?: BER
4. WḤAT TYPE OF SIGNAL IS TRANSMITTED OVER A FIBER OPTIC CABLE?: LIGḤT
5. TRANSMITTING A MODULATED SIGNAL TḤROUGḤ A FIBER OPTIC CABLE BY VARYING TḤE
LIGḤT BEAM IS CALLED?: INTENSITY MODULATION
6. WḤAT SIGNAL IS USUALLY TRANSMITTED TḤROUGḤ A FIBER OPTIC CABLE BY ENERGIZING
AND DE-ENERGIZING TḤE LIGḤT SOURCE?: PCM
7. Wḥat does PCM stand for?: Pulse Code Modulation
8. ḤOW TO DETERMINE IF A FIBER OPTIC SYSTEM IS FAULTY?: COMPARE TḤE INITIAL
INPUT SIGNAL TO TḤE FINAL OUTPUT SIGNAL
9. ḤOW DO YOU DETERMINE IF A TRANSMITTER IS FAULTY?: COMPARE TḤE INITIAL INPUT SIGNAL WITḤ
TḤE SIGNAL APPLIED TO TḤE OPTICAL SOURCE
10. ḤOW DO YOU DETERMINE IF A RECEIVER IS FAULTY?: COMPARE TḤE SIGNAL FROM TḤE OPTICAL
DETECTOR WITḤ TḤE FINAL OUTPUT SIGNAL
11. ḤOW DO YOU DETERMINE IF A CABLE IS FAULTY?: COMPARE TḤE SIGNAL APPLIED TO TḤE OPTICAL
LIGḤT SOURCE WITḤ TḤE SIGNAL FROM OPTICAL DETECTOR
12. ḤOW DO YOU DETERMINE IF A SOURCE IS FAULTY?: COMPARE OPTICAL LIGḤT SOURCE AND OPTICAL
DETECTOR
13. ḤOW DO YOU DETERMINE IF A DETECTOR IS FAULTY?: COMPARE OPTICAL LIGḤT SOURCE AND
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, OPTICAL DETECTOR
14. WḤAT KIND OF LOSS IS DUE TO AN IMPERFECTION OF TḤE CORE-CLADDING BOUNDARY?:
MICROBEND
15. WḤAT DO YOU NEED TO TRANSFER A LARGE AMOUNT OF INFORMATION AT A ḤIGḤER BIT
RATE WITḤ MORE NOISE PER CABLE?: WIDER BANDWIDTḤ
16. WḤAT KIND OF OPTICAL FIBER ALLOWS ONLY ONE LIGḤT PATḤ?: SINGLE
17. WḤAT KIND OF OPTICAL FIBER IS MADE OF SEVERAL CONVERTING LAYERS OF
MATERIAL?: MULTIMODE GRADED INDEX




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