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






2. 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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3. 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.






4. A code within DOS that allows various operations on files and includes a primitive assembler; to eliminate a problem in hardware or software.






5. The beginning address of a segment of memory






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






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






8. The unit of electrical current






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






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






11. In a pulse waveform - the height or maximum value of the pulse as measured from its low level.






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






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






14. The actual current in a branch






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






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






17. 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






18. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






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






21. A type of semiconductor memory that stores data in the form of charge packets and is serially accessed






22. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






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






24. 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.






25. An electrical instrument used to measure current






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






27. 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.






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






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






31. In Boolean algebra - the OR operation






32. A receiving device on a bus






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






34. A type of magnetic tape format






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






36. A combined coder and decoder






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






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






39. The phasor combination of resistive power (true power) and reactive power. The unit is the volt- amperes (VA).






40. A digital counter having ten states






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






42. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






43. 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






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






45. 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.






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






47. Sum of all currents entering a node is equal to the sum of all currents leaving the same node

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






49. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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