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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. Consisting of numerals - letters - and other characters






2. The maximum value of a voltage or current






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






5. 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






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






7. A filter that rejects a range of frequencies lying between two critical frequencies and passes frequencies above and below that range.






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






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






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






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






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






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






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






16. Dual in - line memory module






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






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






19. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






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






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






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






23. Having two stable states. Flip- flops and latches are bistable multivibrators.






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






25. The ability of a capacitor to store electrical charge.






26. An expression of variables and operators used to express the operation of a logic circuit






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






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






29. The beginning address of a segment of memory






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






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






32. A filter that passes a range of frequencies lying between two critical freqencies and rejects frequencies above and below that range.






33. American Standard Code for Information Interchange; the most widely used alphanumeric code.






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






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






36. 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.






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






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






39. 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.






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






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






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






43. In Boolean algebra - the OR operation






44. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs






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






46. The unit of electrical current






47. An electrical instrument used to measure current






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






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






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