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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 circuit that prevents loading of an input or output






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






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






4. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






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






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






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






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






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






10. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






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






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






13. American wire gauge; a standardization based on wire diameter






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






15. The application of a dc voltage to an electronic device to produce a desired mode of operation






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


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






18. A receiving device on a bus






19. 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.


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






21. 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






22. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






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






24. An electrical instrument used to measure current






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






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. Consisting of numerals - letters - and other characters






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






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






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






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






32. 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.






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






34. 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






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






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






37. 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






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






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






40. 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.






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






42. 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






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






44. The unit of electrical current






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 two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






47. 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






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






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






50. A circuit with a complete current path