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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. In a pulse waveform - the height or maximum value of the pulse as measured from its low level.






2. The mathematics of logic circuits






3. An energy source that uses a chemical reaction to convert chemical energy into electrical energy.






4. A type of magnetic tape format






5. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






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






7. American wire gauge; a standardization based on wire diameter






8. 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






9. Data Communications equipment






10. A resettable protective device used for interrupting execessive current in an electric circuit






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






12. A connection at the midpoint of a winding in a transformer






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






14. A receiving device on a bus






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






16. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






17. American Standard Code for Information Interchange; the most widely used alphanumeric code.






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






19. In a division operation the quantity that is being divided






20. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






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






22. A circuit with a complete current path






23. 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






24. The number of protons in a nucleus






25. A set of conductive paths hat connects the CPU to other parts of the computer to coordinate its operations and to communicate with external devices






26. In Boolean algebra - the AND operation






27. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function






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






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






30. The average of a sine wave over one half- cycle. It is 0.637 times the peak value.






31. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






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






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






34. 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.






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






36. The time from the application of a valid memory address to the appearance of valid output data






37. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs






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






39. 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






40. A type of counter in which each stage is clocked from the output of the preceding stage.






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






42. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






43. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






44. 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.






45. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






46. Dual in - line memory module






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






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






49. Having two values or states; describes a number system that has a base of two and utilizes 1 and 0 as its digits






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

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