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






2. 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






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






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






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






6. 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






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






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






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






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






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






12. The mathematics of logic circuits






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






14. Describes a number system with a base of ten






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






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






17. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






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






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






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






21. A connection at the midpoint of a winding in a transformer






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






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






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






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






26. 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






27. 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






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






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






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






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






32. Data Communications equipment






33. 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.






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






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






36. The number of protons in a nucleus






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






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






39. The action of a circuit in which it accepts current into its output from a load






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






41. 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






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






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






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






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






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






47. 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






48. A type of magnetic tape format






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






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