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






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






3. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






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






5. A digital counter having ten states






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






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






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






10. Having two opposites charge carriers within the transistor structure






11. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






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






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






14. Having two directions. the stored data can be shifted right or left






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






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






17. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






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






19. 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






20. The actual current in a branch






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






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






23. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






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






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






26. A logic circuit used to add two binary numbers






27. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






28. Data Communications equipment






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






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






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






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






33. 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.






34. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






35. 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






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






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






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






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






40. Describes a number system with a base of ten






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






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






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






44. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






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






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






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






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






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






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