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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 binary digit - which can be either 1 or 0






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






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






4. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






5. 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






6. 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.






7. The maximum value of a voltage or current






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






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






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






11. An electrical instrument used to measure current






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






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






14. Data Terminal equipment






15. Consisting of numerals - letters - and other characters






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






17. In Boolean algebra - the AND operation






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






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






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






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






22. The unit of electrical current






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






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






25. 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.






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






27. Altera HDL; a nonstandard HDL






28. A group of eight bits






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






30. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






31. 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.






32. 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






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






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






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






36. A digital counter having ten states






37. 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






38. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






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






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






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






42. The beginning address of a segment of memory






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






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






45. Having two opposites charge carriers within the transistor structure






46. 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






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






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






49. 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.






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