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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 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.






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






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






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






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






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






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






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






9. The maximum value of a voltage or current






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






11. The process of producing an output carry in full- adder when both input bits are 1s.






12. A logic circuit used to add two binary numbers






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






14. Altera HDL; a nonstandard HDL






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






16. A circuit with a complete current path






17. In Boolean algebra - the OR operation






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






19. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






21. 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






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






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






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






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






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






27. 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.


28. A digital counter having ten states






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






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






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






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






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






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


35. A group of eight bits






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






37. 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.






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






39. Having two opposites charge carriers within the transistor structure






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






41. The mathematics of logic circuits






42. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






43. Describes a number system with a base of ten






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






45. Data Terminal equipment






46. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






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






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






49. A receiving device on a bus






50. The number of protons in a nucleus