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






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






3. Characteristic of cells in a Karnaugh map in which there is a single- variable change from one cell to another cell next to it on any of its four sides






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






5. In Boolean algebra - the AND operation






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






7. A type of inductor used to block or choke off high frequencies






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






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






10. A type of IC package whose leads must pass through holes to the other side of a PC board






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

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






13. The smallest particle of an element possessing the unique characteristics of that element.






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






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






16. American National Standards Institute






17. 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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18. 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.






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






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






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






22. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously






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






24. The mathematics of logic circuits






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






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






27. Data Terminal equipment






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






29. 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






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






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






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






33. 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.






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






35. A receiving device on a bus






36. 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.






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






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






39. Transistor-Transistor Logic and is implemented with bipolar junction transistors






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






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






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






43. Having two opposites charge carriers within the transistor structure






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






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






46. A software compiler language for SPLD programming; a type of hardware description language (HDL)






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






48. A series of bits describing a final design that is sent to the target device during programming






49. 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.






50. In Boolean algebra - the OR operation