Digital Logic & Microprocessors 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 Digital Logic & Microprocessors flashcards as text
A euthanasia system microcontroller must read a temperature sensor every 500 milliseconds. Which microprocessor feature is best suited to trigger this periodic reading without continuously consuming CPU cycles?
Answer: Hardware timer/interrupt
Hardware timers generate periodic interrupts that signal the CPU at precise intervals, freeing the processor from constant polling loops.
In Boolean algebra used for designing euthanasia equipment safety logic, which law states that A + (B × C) = (A + B) × (A + C)?
Answer: Distributive Law
The Distributive Law in Boolean algebra allows OR to distribute over AND and vice versa, useful for simplifying complex safety logic circuits.
A CO2 euthanasia controller uses a 4-bit DAC (Digital-to-Analog Converter) to control gas flow rate. How many distinct flow rate levels can this DAC produce?
Answer: 16
A 4-bit DAC produces 2^4 = 16 distinct analog output levels, from 0 to full scale.
Which microprocessor bus carries data between the CPU, memory, and peripherals in a euthanasia equipment controller?
Answer: Data bus
The data bus is a bidirectional pathway that transfers actual data values between the CPU, memory, and I/O peripherals.
De Morgan's first theorem states that NOT(A AND B) equals what expression?
Answer: NOT(A) OR NOT(B)
De Morgan's first theorem: the complement of a product (NAND) equals the sum of the complements — NOT(A AND B) = NOT(A) OR NOT(B).
A euthanasia system uses a flip-flop to remember whether a safety alarm has been triggered. Which flip-flop type has only SET and RESET inputs and is most commonly used for simple alarm latching?
Answer: SR (Set-Reset) flip-flop
The SR flip-flop is the most basic bistable element with dedicated Set and Reset inputs, making it ideal for alarm latching applications.
In an embedded microcontroller used for euthanasia equipment, GPIO stands for what?
Answer: General Purpose Input/Output
GPIO (General Purpose Input/Output) pins on a microcontroller can be individually configured as digital inputs or outputs to interface with sensors, valves, and indicators.