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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 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






2. 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






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






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

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






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






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






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






9. A resettable protective device used for interrupting execessive current in an electric circuit






10. 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.






11. Having two opposites charge carriers within the transistor structure






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






13. 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






14. In Boolean algebra - the OR operation






15. 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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16. The unit of electrical current






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






18. 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.






19. 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






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






21. 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.






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






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






24. Digital Signal Processor; a special type of microprocessor that processes data in real time






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






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






27. 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






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






29. A digital counter having ten states






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






31. The beginning address of a segment of memory






32. Burst extended data output dynamic random- access memory






33. The number of protons in a nucleus






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






35. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






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






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






38. A relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






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






40. A group of eight bits






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. A combined coder and decoder






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






44. Having two stable states. Flip- flops and latches are bistable multivibrators.






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






46. One current path in a parallel circuit; a current path that connects two nodes






47. A program that converts English- like mnemonics into machine code






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






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






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







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