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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 converting an analog signal to digital form






2. Characterized by ten states or values






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






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






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






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






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






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






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






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






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






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






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






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






15. Having two opposites charge carriers within the transistor structure






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






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






18. A receiving device on a bus






19. 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






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






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






22. 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.






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






24. 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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25. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






26. 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.






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






28. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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29. Burst extended data output dynamic random- access memory






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






31. The unit of electrical current






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






33. 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






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






35. In Boolean algebra - the AND operation






36. Having two directions. the stored data can be shifted right or left






37. Dual in - line memory module






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






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






40. 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.






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






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






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






44. The digit generated when the sum of two binary digits exceeds 1






45. 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






46. 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






47. 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.






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

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49. A digital counter having ten states






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