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. 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






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






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






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






5. 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.






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






7. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






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






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






10. 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






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






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






13. Data Terminal equipment






14. A software compiler language for SPLD programming; a type of hardware description language (HDL)






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






16. Consisting of numerals - letters - and other characters






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






18. Altera HDL; a nonstandard HDL






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






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






21. The unit of electrical current






22. An electrical instrument used to measure current






23. A logic gate that produces a High output only when all of the inputs are HIGH






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






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






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






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






28. A program that converts English- like mnemonics into machine code






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






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






31. The rotational rate of a phasor which is related to the frequency of the sine wave that the phasor represents






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






33. 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






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






35. A group of eight bits






36. In Boolean algebra - the AND operation






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






38. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






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






40. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






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






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






43. 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.






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






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






46. 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






47. 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






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






49. 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.






50. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.