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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. The number of protons in a nucleus






2. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.






3. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






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






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






7. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






8. 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






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






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






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






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






13. 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.






14. The action of a circuit in which it accepts current into its output from a load






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






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






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






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






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






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






21. 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.






22. 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






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






24. The time from the application of a valid memory address to the appearance of valid output data






25. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






26. A digital counter having ten states






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






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






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






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






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






32. A logic circuit used to add two binary numbers






33. A series of bits describing a final design that is sent to the target device during programming






34. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






35. Burst extended data output dynamic random- access memory






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






37. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






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






39. 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.


40. The actual current in a branch






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






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






43. 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.






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






45. In Boolean algebra - the OR operation






46. The total number of data units(bits - nibbles - bytes - words) that a memory can store.






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






48. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






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