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Digital Fundamentals

Subject : engineering
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. The time from the application of a valid memory address to the appearance of valid output data






2. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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3. Consisting of numerals - letters - and other characters






4. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






5. A complex programmable logic device that consists basically of muliple SPLD arrays with programmable interconnections.






6. A type of IC package whose leads must pass through holes to the other side of a PC board






7. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






8. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






9. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






10. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






11. The maximum value of a voltage or current






12. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






13. Altera HDL; a nonstandard HDL






14. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






15. A digital circuit device that converts coded information into another (familiar) or noncoded form






16. Sum of all the voltage drops in series equals to the source voltage

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17. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative






18. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






19. One of the three regions in a bipolar junction transistor






20. A software compiler language for SPLD programming; a type of hardware description language (HDL)






21. A binary digit - which can be either 1 or 0






22. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






23. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






24. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






25. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






26. A circuit with a complete current path






27. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






28. The process or sequence of operations carried out to program a target device






29. A programming language that uses English like words and has a one- to- one correspondence to machine language






30. A reduction of the output signal compared to the input signal - resulting in a ratio with a value of less than 1 for the output voltage to the input voltage of a circuit.






31. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






32. The process that prevents two sources from using a bus at the same time






33. A condition where all the load currents are equal and the neutral current is zero






34. The actual current in a branch






35. A semiconductor device that conducts current in only one direction






36. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






37. A circuit that prevents loading of an input or output






38. One current path in a parallel circuit; a current path that connects two nodes






39. A series of bits describing a final design that is sent to the target device during programming






40. The smallest particle of an element possessing the unique characteristics of that element.






41. The effect created when a signal is sampled at less than twice the signal frequency. Aliasing creates unwanted frequencies that interfere with the signal frequency.






42. A one- way group of conductors from the to a memory - or other external device - on which the address code is sent






43. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






44. The phasor combination of resistive power (true power) and reactive power. The unit is the volt- amperes (VA).






45. Digital Signal Processor; a special type of microprocessor that processes data in real time






46. American National Standards Institute






47. In Boolean algebra - the OR operation






48. A digital code in which each of the decimal digits - 0 through 9 - is represented by a group of four bits






49. The unit of electrical current






50. In Boolean algebra - the AND operation







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