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 digit generated when the sum of two binary digits exceeds 1






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






3. The beginning address of a segment of memory






4. 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.






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






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






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






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






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






10. Consisting of numerals - letters - and other characters






11. 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






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






13. 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.






14. Characterized by ten states or values






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






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






17. A combined coder and decoder






18. A group of eight bits






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






20. To decrease the binary state of a counter by one






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






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






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






24. Having two values or states; describes a number system that has a base of two and utilizes 1 and 0 as its digits






25. 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






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






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






28. The number of protons in a nucleus






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






30. A logic circuit used to add two binary numbers






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






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






33. 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






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






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






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






38. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






39. Describes a number system with a base of ten






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






41. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






42. Sum of all currents entering a node is equal to the sum of all currents leaving the same node


43. In Boolean algebra - the OR operation






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






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






46. A digital circuit device that converts coded information into another (familiar) or noncoded form






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






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






49. 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






50. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative