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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 method for the automated testing of printed circuit boards in which the board is mounted on a fixture that resembles a bed of nails that makes contact with test points






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






3. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






4. A logic circuit used to add two binary numbers






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






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






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






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






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






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






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






12. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






13. The actual current in a branch






14. Sum of all the voltage drops in series equals to the source voltage

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






16. A digital counter having ten states






17. 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






18. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






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






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






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






22. 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






23. The process of producing an output carry in full- adder when both input bits are 1s.






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






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






26. Dual in - line memory module






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






28. Burst extended data output dynamic random- access memory






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






30. A receiving device on a bus






31. Data Communications equipment






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






33. 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.






34. 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.






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






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






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






38. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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






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






41. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






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






43. 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






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






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






46. 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.






47. The maximum value of a voltage or current






48. The process or sequence of operations carried out to program a target device






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






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