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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. Information in numeric - alphabetic - or other form.






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






3. Characterized by ten states or values






4. Transistor-Transistor Logic and is implemented with bipolar junction transistors






5. 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.






6. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






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






8. In addition - the number to which the addend is added






9. A logic circuit used to add two binary numbers






10. 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






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






12. Digital Signal Processor; a special type of microprocessor that processes data in real time






13. 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






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






15. In Boolean algebra - the OR operation






16. 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






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






18. 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






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






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






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






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






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






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






25. A circuit with a complete current path






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






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






28. In a division operation the quantity that is being divided






29. The beginning address of a segment of memory






30. A digital code in which each of the decimal digits - 0 through 9 - is represented by a group of four bits






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






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






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






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






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






36. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






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






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






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






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






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






43. 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.






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






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






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






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






48. A semiconductor device that conducts current in only one direction






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






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.