Test your basic knowledge |

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






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






3. American wire gauge; a standardization based on wire diameter






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






5. 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.






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






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






8. 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.






9. The beginning address of a segment of memory






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






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






12. A type of magnetic tape format






13. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






14. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)






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






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






17. Consisting of numerals - letters - and other characters






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






19. In Boolean algebra - the AND operation






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






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






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






23. 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.






24. 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






25. A receiving device on a bus






26. A group of eight bits






27. 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






28. A circuit with a complete current path






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






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






31. The number of protons in a nucleus






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.


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






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






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






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






37. A combined coder and decoder






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






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






40. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






41. A digital circuit device that converts coded information into another (familiar) or noncoded form






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






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






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






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






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






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






48. The action of a circuit in which it accepts current into its output from a load






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






50. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic