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

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2. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






3. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






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






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






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






7. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






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






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






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






11. 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






12. 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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13. The maximum value of a voltage or current






14. The number of protons in a nucleus






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






16. 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.






17. A set of conductive paths hat connects the CPU to other parts of the computer to coordinate its operations and to communicate with external devices






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






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






20. 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.






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






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






23. Consisting of numerals - letters - and other characters






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






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






26. 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






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






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






29. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






30. Data Communications equipment






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






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






33. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






34. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






35. A digital counter having ten states






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






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






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






39. A combined coder and decoder






40. 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.






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






42. Having two directions. the stored data can be shifted right or left






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






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






45. A group of eight bits






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






47. A series of bits describing a final design that is sent to the target device during programming






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






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






50. The rotational rate of a phasor which is related to the frequency of the sine wave that the phasor represents







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