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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 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






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






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






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






5. Data Communications equipment






6. Altera HDL; a nonstandard HDL






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

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






9. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.






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






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






12. 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.






13. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






14. 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






15. 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






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






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






18. The unit of electrical current






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






20. The number of protons in a nucleus






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






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






24. The maximum value of a voltage or current






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






26. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






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






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






29. An electrical instrument used to measure current






30. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






31. Data Terminal equipment






32. Consisting of numerals - letters - and other characters






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






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






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






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






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






38. The average of a sine wave over one half- cycle. It is 0.637 times the peak value.






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






40. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






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






42. 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.






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






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






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






46. 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






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






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






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






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