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






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






3. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.






4. The rotational rate of a phasor which is related to the frequency of the sine wave that the phasor represents






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






6. A combined coder and decoder






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






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






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






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






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






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






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






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






15. A document that specifies parameter values and operating conditions for an integrated circuits or other device






16. 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






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






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






19. Characterized by ten states or values






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






21. The mathematics of logic circuits






22. A filter that rejects a range of frequencies lying between two critical frequencies and passes frequencies above and below that range.






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






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






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






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






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






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






29. Describes a number system with a base of ten






30. Altera HDL; a nonstandard HDL






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






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






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






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






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






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






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






38. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification






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






40. The unit of electrical current






41. 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.






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






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






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






45. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)






46. A receiving device on a bus






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






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






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






50. 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.