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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 current left after the total load current is subtracted from the total current into the circuit






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






3. In addition - the number to which the addend is added






4. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






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






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






7. Consisting of numerals - letters - and other characters






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






9. 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.






10. An adverse condition that could occur if two or more devices try to communicate at the same time on a bus






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






12. Data Communications equipment






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






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

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15. 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






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






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






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






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






20. Data Terminal equipment






21. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function






22. A group of eight bits






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






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






25. 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.






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






27. Characterized by ten states or values






28. Altera HDL; a nonstandard HDL






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






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






31. In Boolean algebra - the OR operation






32. 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.






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






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






35. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






36. A digital counter having ten states






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






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






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






40. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






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






43. A semiconductor device that conducts current in only one direction






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






45. The beginning address of a segment of memory






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






47. 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.






48. One of the three regions in a bipolar junction transistor






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






50. The number of protons in a nucleus