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






2. 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






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

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






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






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






7. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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8. An electrical instrument used to measure current






9. 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.






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






11. A combined coder and decoder






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






13. Having two directions. the stored data can be shifted right or left






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






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






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






17. 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.






18. 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.






19. 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






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






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






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






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






24. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






25. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






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






27. 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






28. 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.






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






30. 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






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






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






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






34. A digital counter having ten states






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






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






37. Burst extended data output dynamic random- access memory






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






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






40. 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.






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






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






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






44. 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.






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






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






47. 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






48. Consisting of numerals - letters - and other characters






49. Having two opposites charge carriers within the transistor structure






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