EECS 473 Final UPDATED Exam Questions and CORRECT Answers
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Course
EECS 473
Institution
EECS 473
EECS 473 Final UPDATED Exam
Questions and CORRECT Answers
Source decoding generally involves checking error correction bits and doing error
correction/detection as needed. - Correct Answer- false
We generally prefer to use primary cells rather than secondary cells when powering a lowpower el...
EECS 473 Final UPDATED Exam
Questions and CORRECT Answers
Source decoding generally involves checking error correction bits and doing error
correction/detection as needed. - Correct Answer- false
We generally prefer to use primary cells rather than secondary cells when powering a low-
power electronic device that is rarely used over a period of years. - Correct Answer- true
We sometimes use an LDO followed by a buck converter in order to get both a more efficient
conversion and less noise on the output. - Correct Answer- false
An LDO which converts 20V to 5V will waste at least 75% of the input power as heat, while
a switching regulator would almost certainly waste significantly less than that. - Correct
Answer- true
16 QAM modulation sends 4 bits of information in a single encoding. - Correct Answer- true
You could reasonably expect a LIPO battery being drained at a constant rate of 0.01C to last
at least 90 hours but couldn't expect that same battery being drained at 2C to last for at least
an hour. - Correct Answer- true
Most PCB fab houses today require a clearance of at least 25 mills between traces. - Correct
Answer- false (4-6 mils)
A convolution code is an error correction scheme that uses a fixed block of data rather than a
sliding window of the data. - Correct Answer- false
On-off keying (OOK) can be viewed as a simple form of ASK. - Correct Answer- true
When doing RM scheduling with 4 ideal tasks, any combination of tasks which has a total
CPU utilization of 67.6% or less can be RM scheduled. - Correct Answer- true
, A buck converter and a LDO both drive a lower voltage out than was provided as input. -
Correct Answer- true
All else being equal you would expect higher frequency wireless signal to travel farther than
a lower frequency wireless signal. - Correct Answer- false
Source encoding generally involves adding error correction bits and is dependent on the
characteristics of the "source" data. - Correct Answer- false
We generally prefer to use LiPo batteries rather than alkaline batteries when powering a low-
power electronic device that is rarely used over a period of years. - Correct Answer- false
One primary advantage of round-robin scheduling is that it can schedule any set of tasks that
have less than 63% total CPU utilization (assuming dependencies between tasks). - Correct
Answer- false
A buck converter is a switching power supply where power is supplied by the capacitor when
in what is called "discontinuous mode". - Correct Answer- true
Shannon's Limit provides an upper-bound on the rate of useful data we can send over a given
channel. - Correct Answer- true
An LDO which converts 20V to 15V can potentially waste less than 15% of the input power
as heat, while a switching regulator would almost certainly waste significantly less than that.
- Correct Answer- false
When designing a power distribution network, high frequency noise (say over 500MHz)
should be largely handled by the capacitor formed from the power and ground planes. -
Correct Answer- true
8-PSK sends 3 bits of information in a single encoding. - Correct Answer- true
You could reasonably expect a LIPO battery being drained at a constant rate of 0.1C to last
close to 10 hours. - Correct Answer- true
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