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






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






3. The number of protons in a nucleus






4. 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.






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






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






7. An array of AND gates consisting of a matrix of programmable interconnection






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






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






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






11. 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.






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






13. The phasor combination of resistive power (true power) and reactive power. The unit is the volt- amperes (VA).






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






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






16. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






17. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






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






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






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

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21. The maximum value of a voltage or current






22. The beginning address of a segment of memory






23. 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






24. Sum of all the voltage drops in series equals to the source voltage

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25. In a division operation the quantity that is being divided






26. The mathematics of logic circuits






27. 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






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






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






30. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






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






32. 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






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 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






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






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






37. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






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






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






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






42. Having two opposites charge carriers within the transistor structure






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






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






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






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






48. American National Standards Institute






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






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