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






2. In Boolean algebra - the OR operation






3. 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.






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






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






6. Data Terminal equipment






7. A method of analog- to- digital conversion using a 1- bit quantization process






8. 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.


9. A programming language that uses English like words and has a one- to- one correspondence to machine language






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






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






12. The mathematics of logic circuits






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






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






15. Having two values or states; describes a number system that has a base of two and utilizes 1 and 0 as its digits






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






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






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






19. 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.






20. 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






21. Consisting of numerals - letters - and other characters






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






23. A series of bits describing a final design that is sent to the target device during programming






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






25. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






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






27. The smallest particle of an element possessing the unique characteristics of that element.






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






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






30. 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






31. A digital counter having ten states






32. The range of frequencies for which the current (or output voltage) is equal to or greater than 70.7% of its value at the resonant frequency that is considered to be passed by a filter.






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


34. American National Standards Institute






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






36. Describes a number system with a base of ten






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






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






39. 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.






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






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






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






43. Characterized by ten states or values






44. 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






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






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






47. A combined coder and decoder






48. Information in numeric - alphabetic - or other form.






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






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