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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 connection at the midpoint of a winding in a transformer






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






3. 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






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






5. 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






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






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






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






9. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






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






11. In Boolean algebra - the AND operation






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






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






14. 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






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






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






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






18. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






19. A group of eight bits






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






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






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






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






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






25. 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






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






27. A document that specifies parameter values and operating conditions for an integrated circuits or other device






28. The process or sequence of operations carried out to program a target device






29. A type of magnetic tape format






30. 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.






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






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






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






34. A circuit with a complete current path






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






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






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






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






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






40. In Boolean algebra - the OR operation






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






42. Having two opposites charge carriers within the transistor structure






43. 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






44. 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






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

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






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






48. A logic circuit used to add two binary numbers






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






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