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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. A combined coder and decoder






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






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






4. The normal level of a pulse waveform; the voltage level in the absence of a pulse.






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






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






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






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






9. 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.






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






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






12. Burst extended data output dynamic random- access memory






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






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






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






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






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






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






19. 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.






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






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






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

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






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






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






26. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






27. 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






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






29. A receiving device on a bus






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






31. 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






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






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






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






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






36. A condition where all the load currents are equal and the neutral current is zero






37. A type of magnetic tape format






38. Altera HDL; a nonstandard HDL






39. The digit generated when the sum of two binary digits exceeds 1






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






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






42. 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






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






44. 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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45. To decrease the binary state of a counter by one






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






47. A group of eight bits






48. Having two opposites charge carriers within the transistor structure






49. 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






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