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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 type of inductor used to block or choke off high frequencies






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






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






4. 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.






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






6. A transformer in which the primary and secondary are in a single winding






7. 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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8. A semiconductor device that conducts current in only one direction






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






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






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






12. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






13. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






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






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






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






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






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






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






20. 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






21. 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.






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






23. A logic circuit used to add two binary numbers






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






25. The unit of electrical current






26. A programming language that uses English like words and has a one- to- one correspondence to machine language






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.

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28. 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






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






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






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






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






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






34. A receiving device on a bus






35. Data Communications equipment






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






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






38. 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.






39. A connection at the midpoint of a winding in a transformer






40. A circuit with a complete current path






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






42. The mathematics of logic circuits






43. A digital counter having ten states






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






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






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






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






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






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






50. The process or sequence of operations carried out to program a target device