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






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






3. The maximum value of a voltage or current






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






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






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

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






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






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






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






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






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






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






15. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






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






17. Burst extended data output dynamic random- access memory






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






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






20. A relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






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






22. Altera HDL; a nonstandard HDL






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






24. A digital counter having ten states






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






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






27. A logic circuit used to add two binary numbers






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






29. 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.






30. 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






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






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






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






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






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






36. 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.






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






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






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






40. Data Terminal equipment






41. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






42. Having two opposites charge carriers within the transistor structure






43. A group of eight bits






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






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






46. A combined coder and decoder






47. 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.






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






49. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






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