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






2. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






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






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






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






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






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






8. In Boolean algebra - the OR operation






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






10. Dual in - line memory module






11. Burst extended data output dynamic random- access memory






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






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






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






15. The number of protons in a nucleus






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






17. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






18. 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






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






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






21. 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.






22. The process of rippling an input carry to become the output carry in a full- adder when either or both of the input bits are 1's and the input carry is a 1






23. Consisting of numerals - letters - and other characters






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






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






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






27. 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






28. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






29. In Boolean algebra - the AND operation






30. The range of frequencies for which the current (or output voltage) is equal to or greater than 70.7% of its value at the resonant frequency that is considered to be passed by a filter.






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






32. A digital counter having ten states






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






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






35. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






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






37. 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






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






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






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






41. 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






42. 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.






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






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






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






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






49. American National Standards Institute






50. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






Can you answer 50 questions in 15 minutes?



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