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






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






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






4. A logic circuit used to add two binary numbers






5. A one- way group of conductors from the to a memory - or other external device - on which the address code is sent






6. The unit of electrical current






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






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






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






10. 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






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






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






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






14. 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.






15. 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






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






17. 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.






18. A group of eight bits






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






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






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






22. 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






23. Describes a number system with a base of ten






24. The mathematics of logic circuits






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






26. Characterized by ten states or values






27. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






28. In addition - the number to which the addend is added






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






30. 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






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






32. 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






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






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






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






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






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






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






39. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






40. American Standard Code for Information Interchange; the most widely used alphanumeric code.






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






42. Having two opposites charge carriers within the transistor structure






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






44. A document that specifies parameter values and operating conditions for an integrated circuits or other device






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






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






47. An electrical instrument used to measure current






48. 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






49. 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.






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