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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. An electrical instrument used to measure current






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






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






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






5. 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






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






7. The process of converting an analog signal to digital form






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






9. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






10. A receiving device on a bus






11. Burst extended data output dynamic random- access memory






12. 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.






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






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






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






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






17. A digital counter having ten states






18. 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






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






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






21. 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.






22. A software compiler language for SPLD programming; a type of hardware description language (HDL)






23. 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






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






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






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






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






28. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






29. Having two opposites charge carriers within the transistor structure






30. Characterized by ten states or values






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






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






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






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






36. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






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






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

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






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






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






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






44. The process or sequence of operations carried out to program a target device






45. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously






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






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






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






49. One current path in a parallel circuit; a current path that connects two nodes






50. 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