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






2. 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






3. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






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






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






7. A combined coder and decoder






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






9. 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.






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






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






12. 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






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






14. An electrical instrument used to measure current






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






16. 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






17. The beginning address of a segment of memory






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

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






20. Sum of all currents entering a node is equal to the sum of all currents leaving the same node

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






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






23. 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.






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






25. A relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






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






27. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






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






29. A code within DOS that allows various operations on files and includes a primitive assembler; to eliminate a problem in hardware or software.






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






31. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






32. Dual in - line memory module






33. 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






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






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






37. The normal level of a pulse waveform; the voltage level in the absence of a pulse.






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






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






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






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






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






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






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






45. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






46. Having two opposites charge carriers within the transistor structure






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






48. Characterized by ten states or values






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






50. In Boolean algebra - the AND operation







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