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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 ratio of pulse width to period expressed as a percentage






2. In Boolean algebra - the AND operation






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






4. An expression of variables and operators used to express the operation of a logic circuit






5. An adverse condition that could occur if two or more devices try to communicate at the same time on a bus






6. The digit generated when the sum of two binary digits exceeds 1






7. A document that specifies parameter values and operating conditions for an integrated circuits or other device






8. A digital counter having ten states






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






10. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






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






12. A method of analog- to- digital conversion using a 1- bit quantization process






13. A filter that rejects a range of frequencies lying between two critical frequencies and passes frequencies above and below that range.






14. A device used to convert an analog signal to a sequence of digital codes






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






16. The total number of data units(bits - nibbles - bytes - words) that a memory can store.






17. A type of inductor used to block or choke off high frequencies






18. To decrease the binary state of a counter by one






19. A unit of the cross - sectional area of a wire.






20. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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21. The unit of electrical current






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






23. 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






24. Having two opposites charge carriers within the transistor structure






25. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously






26. In addition - the number that is added to another number called the augend






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






28. A circuit with a complete current path






29. Altera HDL; a nonstandard HDL






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






31. A type of magnetic tape format






32. Characterized by ten states or values






33. Digital audio tape; a type of magnetic tape format






34. A method for the automated testing of printed circuit boards in which the board is mounted on a fixture that resembles a bed of nails that makes contact with test points






35. In a PLD - a matrix formed by rows of product- term lines columns of input lines with a programmable cell at each junctions. In VHDL - an array is an ordered set of individual items called elements with a single identifier name.






36. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






37. A logic circuit used to add two binary numbers






38. A filter that passes a range of frequencies lying between two critical freqencies and rejects frequencies above and below that range.






39. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.






40. Burst extended data output dynamic random- access memory






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






42. A logic gate that produces a High output only when all of the inputs are HIGH






43. The application of a dc voltage to an electronic device to produce a desired mode of operation






44. Having two directions. the stored data can be shifted right or left






45. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






46. 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






47. The maximum value of a voltage or current






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






49. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






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