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






2. A digital counter having ten states






3. 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






4. In Boolean algebra - the OR operation






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






6. In Boolean algebra - the AND operation






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






8. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






9. 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.






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






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






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






13. A circuit with a complete current path






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






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






16. The beginning address of a segment of memory






17. The mathematics of logic circuits






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






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






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






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






22. 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.






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






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






25. 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






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






27. A receiving device on a bus






28. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






29. The smallest particle of an element possessing the unique characteristics of that element.






30. 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






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






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






33. In addition - the number that is added to another number called the augend






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






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






36. A programming language that uses English like words and has a one- to- one correspondence to machine language






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






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






39. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






40. The actual current in a branch






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






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






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






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






45. A combined coder and decoder






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


47. Burst extended data output dynamic random- access memory






48. An energy source that uses a chemical reaction to convert chemical energy into electrical energy.






49. Describes a number system with a base of ten






50. 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.