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






2. 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.






3. A logic circuit used to add two binary numbers






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






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






6. The actual current in a branch






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






8. A group of eight bits






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






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






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






12. A type of magnetic tape format






13. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative






14. 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






15. 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.






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






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






18. An array of AND gates consisting of a matrix of programmable interconnection






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






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






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






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






24. 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.






25. Burst extended data output dynamic random- access memory






26. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






27. An expression of variables and operators used to express the operation of a logic circuit






28. The maximum value of a voltage or current






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






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






31. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






32. The rotational rate of a phasor which is related to the frequency of the sine wave that the phasor represents






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






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






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






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






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






38. 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.






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






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






41. 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






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






43. The number of protons in a nucleus






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






45. One of the three regions in a bipolar junction transistor






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






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






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






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






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






Can you answer 50 questions in 15 minutes?



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