Coding & Classification Systems Flashcards
7 cards from real CET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Coding & Classification Systems flashcards as text
In the EIA color code system, what multiplier does a gold band represent?
Answer: 0.1
A gold band in the multiplier position represents a multiplier of 0.1, shifting the base value one decimal place to the left.
Which JEDEC prefix letter indicates a small-signal NPN transistor in the 2N series?
Answer: 2N
The JEDEC 2N prefix designates a bipolar transistor (both NPN and PNP types) registered with the JEDEC organization.
In binary-coded decimal (BCD), what is the decimal value of the code 1001 0011?
Answer: 93
In BCD, each 4-bit group represents one decimal digit: 1001 = 9 and 0011 = 3, so the value is 93.
Which coding system uses mark and space to represent binary 1 and 0 in serial communications?
Answer: NRZ (Non-Return to Zero)
NRZ coding holds a high voltage (mark) for logic 1 and low voltage (space) for logic 0 throughout each bit period.
What is the hexadecimal equivalent of binary 1101 1010?
Answer: DA
Splitting into nibbles: 1101 = D and 1010 = A, giving hexadecimal DA.
In the military specification (MIL-SPEC) resistor coding system, what does the letter 'R' indicate in a value like 4R7?
Answer: Decimal point position
In MIL-SPEC notation, 'R' serves as the decimal point, so 4R7 means 4.7 ohms.
The Gray code sequence after 0111 (decimal 7) is:
Answer: 1100
Gray code for decimal 8 is 1100; in Gray code only one bit changes between consecutive values, so 0111 transitions to 1100.