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






2. The mathematics of logic circuits






3. A type of magnetic tape format






4. 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






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






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






7. Burst extended data output dynamic random- access memory






8. 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.






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






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






11. 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.






12. A digital counter having ten states






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






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






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






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






17. 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.






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






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






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






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






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






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

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






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






26. A group of eight bits






27. One of the three regions in a bipolar Junction transistor(North junction of NpN)






28. A circuit with a complete current path






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






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






31. A code within DOS that allows various operations on files and includes a primitive assembler; to eliminate a problem in hardware or software.






32. In Boolean algebra - the AND operation






33. 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.






34. Data Terminal equipment






35. 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






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






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






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






39. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






40. In a PLD - a matrix formed by rows of product- term lines columns of input lines with a programmable cell at each junctions. In VHDL - an array is an ordered set of individual items called elements with a single identifier name.






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






42. An arrangement of electrical and/or electronic components interconnected in such a way as to perform a specified function






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






44. Data Communications equipment






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






46. The unit of electrical current






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






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






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






50. An electrical instrument used to measure current