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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. Data Terminal equipment






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






3. The unit of electrical current






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






5. Describes a number system with a base of ten






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






7. 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.






8. A type of magnetic tape format






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






10. The effect created when a signal is sampled at less than twice the signal frequency. Aliasing creates unwanted frequencies that interfere with the signal frequency.






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






12. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






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






14. 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






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






16. The process of rippling an input carry to become the output carry in a full- adder when either or both of the input bits are 1's and the input carry is a 1






17. Burst extended data output dynamic random- access memory






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






19. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






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






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






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






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






24. 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






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






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






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






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






29. 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






30. 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






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






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






33. A digital counter having ten states






34. A type of IC package whose leads must pass through holes to the other side of a PC board






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 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






37. In Boolean algebra - the OR operation






38. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






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






40. A type of counter in which each stage is clocked from the output of the preceding stage.






41. The beginning address of a segment of memory






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






43. Data Communications equipment






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






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






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






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






48. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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






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