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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 beginning address of a segment of memory






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






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






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






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






6. To decrease the binary state of a counter by one






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






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






9. The maximum value of a voltage or current






10. A type of inductor used to block or choke off high frequencies






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






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






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






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






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






16. The number of protons in a nucleus






17. 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.






18. Describes a number system with a base of ten






19. Burst extended data output dynamic random- access memory






20. 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.






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






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






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






24. 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






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






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






27. In Boolean algebra - the OR operation






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






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






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






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






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






33. Having two opposites charge carriers within the transistor structure






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






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






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






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






38. 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.






39. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






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

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42. The unit of electrical current






43. 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.






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






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






46. The mathematics of logic circuits






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






48. A set of interconnections that interface one or more devices based on a standardized specification






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






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