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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. The actual current in a branch






3. An expression of variables and operators used to express the operation of a logic circuit






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






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






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






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






8. 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






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






10. In Boolean algebra - the AND operation






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






12. The number of protons in a nucleus






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






14. 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.






15. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






16. The beginning address of a segment of memory






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






18. The ability of a capacitor to store electrical charge.






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






20. Burst extended data output dynamic random- access memory






21. Dual in - line memory module






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

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






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






25. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






26. A logic circuit used to add two binary numbers






27. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






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






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






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






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






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






33. A receiving device on a bus






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






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






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






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






38. The digit generated when the sum of two binary digits exceeds 1






39. The mathematics of logic circuits






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






41. Describes a number system with a base of ten






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






43. 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.






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






45. Data Terminal equipment






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






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






48. Digital audio tape; a type of magnetic tape format






49. Consisting of numerals - letters - and other characters






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