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 graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






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






3. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






4. A code within DOS that allows various operations on files and includes a primitive assembler; to eliminate a problem in hardware or software.






5. 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






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






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






8. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






9. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






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






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






12. 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.






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






14. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.






15. Describes a number system with a base of ten






16. The unit of electrical current






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






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






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






20. 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.


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






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






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






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






25. 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






26. A program that converts English- like mnemonics into machine code






27. 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






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






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






30. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






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






32. Digital Signal Processor; a special type of microprocessor that processes data in real time






33. Having two opposites charge carriers within the transistor structure






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






35. The beginning address of a segment of memory






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






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






38. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






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






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






42. 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






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






44. 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






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






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






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






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






49. The process of rippling an input carry to become the output carry in a full- adder when either or both of the input bits are 1's and the input carry is a 1






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