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. The actual current in a branch






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






3. American National Standards Institute






4. Data Terminal equipment






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






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






7. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






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






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






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






11. Characterized by ten states or values






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






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






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






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






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






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






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






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






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






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






22. 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.






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






24. 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.






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






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






27. The effect created when a signal is sampled at less than twice the signal frequency. Aliasing creates unwanted frequencies that interfere with the signal frequency.






28. The maximum value of a voltage or current






29. A receiving device on a bus






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






31. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






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






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






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






35. A group of eight bits






36. 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.


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






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






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






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






41. 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.






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






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






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






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






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






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






48. 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.






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






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