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






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






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






4. 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






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






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






7. A condition where all the load currents are equal and the neutral current is zero






8. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






9. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






10. 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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11. One of the three regions in a bipolar junction transistor






12. An electrical instrument used to measure current






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






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






15. In Boolean algebra - the AND operation






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






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






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






19. 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.






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






21. 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.






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






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






24. 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






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






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






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






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






29. Altera HDL; a nonstandard HDL






30. Characterized by ten states or values






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






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






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






34. 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






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






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






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






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






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






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






41. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






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






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






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






45. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






46. A set of interconnections that interface one or more devices based on a standardized specification






47. 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






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






49. The digit generated when the sum of two binary digits exceeds 1






50. 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