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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 group of eight bits






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






3. The unit of electrical current






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






5. The actual current in a branch






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






7. Describes a number system with a base of ten






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






9. To decrease the binary state of a counter by one






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






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






12. 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.






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






14. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






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






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






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






18. 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.






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






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






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






22. A transformer in which the primary and secondary are in a single winding






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






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






25. 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.






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






27. An electrical instrument used to measure current






28. Having two opposites charge carriers within the transistor structure






29. The beginning address of a segment of memory






30. Data Communications equipment






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






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






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






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

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35. American wire gauge; a standardization based on wire diameter






36. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






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






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






40. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






41. A measure of the ability of a reactive circuit to permit current; the reciprocal of impedance. the unit is the siemens






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






43. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






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






45. 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






46. 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.






47. 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






48. Burst extended data output dynamic random- access memory






49. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






50. Altera HDL; a nonstandard HDL







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