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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 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






2. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






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






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






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






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






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






8. A combined coder and decoder






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






10. 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






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






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






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






14. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






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






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






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






18. Digital audio tape; a type of magnetic tape format






19. A transformer in which the primary and secondary are in a single winding






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






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






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






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






24. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






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






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






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






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

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






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






31. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






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






33. Consisting of numerals - letters - and other characters






34. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






35. A receiving device on a bus






36. 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






37. A type of magnetic tape format






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






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






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






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

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






43. Describes a number system with a base of ten






44. American National Standards Institute






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






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






47. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






48. In Boolean algebra - the AND operation






49. One of the three regions in a bipolar Junction transistor(North junction of NpN)






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