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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 circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






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






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






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






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






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






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






8. The actual current in a branch






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 combined coder and decoder






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

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12. 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






13. Characterized by ten states or values






14. A digital counter having ten states






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






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






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






18. The beginning address of a segment of memory






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

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






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






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






23. One current path in a parallel circuit; a current path that connects two nodes






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






25. Having two opposites charge carriers within the transistor structure






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






27. A receiving device on a bus






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






29. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






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






31. Describes a number system with a base of ten






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






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






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






35. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






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






37. Data Communications equipment






38. A class of integrated logic circuits that is implemented with a type of field effect transistor






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






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






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






43. Data Terminal equipment






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






45. 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.






46. The number of protons in a nucleus






47. In Boolean algebra - the AND operation






48. In Boolean algebra - the OR operation






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






50. 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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