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






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






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






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






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






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






7. A program that converts English- like mnemonics into machine code






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






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






10. Data Communications equipment






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

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






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






14. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






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






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






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






18. Consisting of numerals - letters - and other characters






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






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






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






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






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






24. A logic circuit used to add two binary numbers






25. The beginning address of a segment of memory






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






27. Describes a number system with a base of ten






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






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. Information in numeric - alphabetic - or other form.






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






34. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






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






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






37. Characterized by ten states or values






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






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






41. In Boolean algebra - the OR operation






42. 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






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






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






45. 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






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






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






48. Altera HDL; a nonstandard HDL






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






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