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






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






3. Data Communications equipment






4. The mathematics of logic circuits






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






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






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






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






9. 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






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






11. 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






12. 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






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






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






15. The actual current in a branch






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






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






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






19. 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






20. 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






21. Altera HDL; a nonstandard HDL






22. 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.






23. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function






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






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






26. 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.






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






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






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






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






31. 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






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






33. A receiving device on a bus






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






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






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






37. The maximum value of a voltage or current






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






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






40. A type of semiconductor memory that stores data in the form of charge packets and is serially accessed






41. A class of integrated logic circuits that is implemented with a type of field effect transistor






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






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






44. 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.






45. 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.






46. Characterized by ten states or values






47. The range of frequencies for which the current (or output voltage) is equal to or greater than 70.7% of its value at the resonant frequency that is considered to be passed by a filter.






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






49. American National Standards Institute






50. A group of eight bits