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






3. A combined coder and decoder






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






5. The application of a dc voltage to an electronic device to produce a desired mode of operation






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






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






8. Describes a number system with a base of ten






9. The maximum value of a voltage or current






10. Data Communications equipment






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






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






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






14. 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






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






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






17. 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.






18. A resettable protective device used for interrupting execessive current in an electric circuit






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






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






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






22. A software compiler language for SPLD programming; a type of hardware description language (HDL)






23. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






24. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






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






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






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






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






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






30. 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.






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






32. 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.






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






34. A receiving device on a bus






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






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






37. 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






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






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






40. Altera HDL; a nonstandard HDL






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






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






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






44. In Boolean algebra - the OR operation






45. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






46. A type of inductor used to block or choke off high frequencies






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






48. 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.






49. In addition - the number that is added to another number called the augend






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