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






2. A set of interconnections that interface one or more devices based on a standardized specification






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






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






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






6. An electrical instrument used to measure current






7. The beginning address of a segment of memory






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






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






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






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






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






13. 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






14. Having two opposites charge carriers within the transistor structure






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






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






17. A digital counter having ten states






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






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






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






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






22. Data Communications equipment






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






24. The maximum value of a voltage or current






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






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






27. The unit of electrical current






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






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






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






31. The actual current in a branch






32. An arrangement of electrical and/or electronic components interconnected in such a way as to perform a specified function






33. The process of converting an analog signal to digital form






34. Consisting of numerals - letters - and other characters






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






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






37. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






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






39. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






40. The mathematics of logic circuits






41. A program that converts English- like mnemonics into machine code






42. One of the three regions in a bipolar Junction transistor(North junction of NpN)






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

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44. The number of protons in a nucleus






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






46. The ratio of pulse width to period expressed as a percentage






47. A measure of the ability of a reactive circuit to permit current; the reciprocal of impedance. the unit is the siemens






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






49. Dual in - line memory module






50. 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.