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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 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.






2. 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.






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






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






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






6. A class of integrated logic circuits that is implemented with a type of field effect transistor






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






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






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






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






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






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






13. A type of semiconductor memory that stores data in the form of charge packets and is serially accessed






14. An array of AND gates consisting of a matrix of programmable interconnection






15. Characterized by ten states or values






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






17. The process of rippling an input carry to become the output carry in a full- adder when either or both of the input bits are 1's and the input carry is a 1






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






19. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






21. Burst extended data output dynamic random- access memory






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






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






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






25. American National Standards Institute






26. 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.






27. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






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






29. An electrical instrument used to measure current






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






31. 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






32. Information in numeric - alphabetic - or other form.






33. Transistor-Transistor Logic and is implemented with bipolar junction transistors






34. Dual in - line memory module






35. 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






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






37. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






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






39. The ability of a capacitor to store electrical charge.






40. 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.






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






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






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






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






46. A transformer in which the primary and secondary are in a single winding






47. The action of a circuit in which it accepts current into its output from a load






48. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






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






50. The current left after the total load current is subtracted from the total current into the circuit