ECSA 102 PRINTING REVIEW SHEET TESTED
QUESTIONS AND ACCURATE ANSWERS
ALREADY PASSED
⩥ What does PCI stand for?
Answer: Peripheral component interconnect, legacy
⩥ Type of communication of PCI?
Answer: 32bit and 64bit parallel communication
⩥ Voltage of PCI?
Answer: 3.3V and 5V
⩥ What is the NFC range?
Answer: 4cm
⩥ What does LCD stand for and how does it work?
Answer: Liquid crystal display, light shines through liquid filters
⩥ What are the types of LCD and what do they stand for?
Answer: TN = twisted nemantic
,IPS = in plane switching
VA = vertical alignment
⩥ Difference between different LCD types?
Answer: TN = better response time, bad wide angles, low power
IPS = better colors, more expensive, good angles
VA = best contrast, bad angles
⩥ Different types of LCD backlights?
Answer: CCFL = cold cathode fluorescent lamp
LED
⩥ What is special about CCFL?
Answer: Uses AC power when the computer requires DC, so need an
inverter
⩥ How many pins is USB-C? What makes it special?
Answer: 24pins, can be used to transmit other signals (HDMI,
DisplayPort)
⩥ What was used before USB connectivity and with what kind of
signal? How many pins?
Answer: DB-9 cable with RS232 signal, 9pin
,⩥ What kind of stylus' are there?
Answer: Capacitive stylus = touch pen
Active stylus = apple pencil, can communicate independently of the
screen
⩥ What is the older type of headset connection? With what type of
signal?
Answer: 3.5mm TRRS (tip ring ring sleeve) with an analog signal
⩥ What were the 2G networks? What did they stand for?
Answer: GSM = global system for mobile communication
CDMA = code division multiple access
⩥ What companies used GSM and how did it work?
Answer: AT+T and T-Mobile, has multiplexing
⩥ What does multiplexing mean?
Answer: Multiple data signals use the same channel without interference
⩥ What companies used CDMA? How did it work?
Answer: Verizon and Sprint, each person used a different code
, ⩥ What was the purpose of 4G? What did it stand for?
Answer: To combine GSM and CDMA, LTE = long term evolution
⩥ What does EDGE stand for?
Answer: Enhanced data rates for GSM evolution
⩥ What is PRL? How does it update?
Answer: Preferred roaming list, so your cell phone can connect to the
right tower, updates OTA (over the air)
⩥ How does GPS work?
Answer: 30 satellites in the air, your device needs to see 4 for accurate
location
⩥ What does MDM stand for? And do?
Answer: Mobile device management, companies can manage user
devices through one console
⩥ What is meant by a partition?
Answer: Keeping company data and private data separate
⩥ What are the two types of IP payloads? What do they stand for?
QUESTIONS AND ACCURATE ANSWERS
ALREADY PASSED
⩥ What does PCI stand for?
Answer: Peripheral component interconnect, legacy
⩥ Type of communication of PCI?
Answer: 32bit and 64bit parallel communication
⩥ Voltage of PCI?
Answer: 3.3V and 5V
⩥ What is the NFC range?
Answer: 4cm
⩥ What does LCD stand for and how does it work?
Answer: Liquid crystal display, light shines through liquid filters
⩥ What are the types of LCD and what do they stand for?
Answer: TN = twisted nemantic
,IPS = in plane switching
VA = vertical alignment
⩥ Difference between different LCD types?
Answer: TN = better response time, bad wide angles, low power
IPS = better colors, more expensive, good angles
VA = best contrast, bad angles
⩥ Different types of LCD backlights?
Answer: CCFL = cold cathode fluorescent lamp
LED
⩥ What is special about CCFL?
Answer: Uses AC power when the computer requires DC, so need an
inverter
⩥ How many pins is USB-C? What makes it special?
Answer: 24pins, can be used to transmit other signals (HDMI,
DisplayPort)
⩥ What was used before USB connectivity and with what kind of
signal? How many pins?
Answer: DB-9 cable with RS232 signal, 9pin
,⩥ What kind of stylus' are there?
Answer: Capacitive stylus = touch pen
Active stylus = apple pencil, can communicate independently of the
screen
⩥ What is the older type of headset connection? With what type of
signal?
Answer: 3.5mm TRRS (tip ring ring sleeve) with an analog signal
⩥ What were the 2G networks? What did they stand for?
Answer: GSM = global system for mobile communication
CDMA = code division multiple access
⩥ What companies used GSM and how did it work?
Answer: AT+T and T-Mobile, has multiplexing
⩥ What does multiplexing mean?
Answer: Multiple data signals use the same channel without interference
⩥ What companies used CDMA? How did it work?
Answer: Verizon and Sprint, each person used a different code
, ⩥ What was the purpose of 4G? What did it stand for?
Answer: To combine GSM and CDMA, LTE = long term evolution
⩥ What does EDGE stand for?
Answer: Enhanced data rates for GSM evolution
⩥ What is PRL? How does it update?
Answer: Preferred roaming list, so your cell phone can connect to the
right tower, updates OTA (over the air)
⩥ How does GPS work?
Answer: 30 satellites in the air, your device needs to see 4 for accurate
location
⩥ What does MDM stand for? And do?
Answer: Mobile device management, companies can manage user
devices through one console
⩥ What is meant by a partition?
Answer: Keeping company data and private data separate
⩥ What are the two types of IP payloads? What do they stand for?
