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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. American National Standards Institute






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






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






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






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






6. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






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






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






9. A logic circuit used to add two binary numbers






10. In Boolean algebra - the AND operation






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






12. A transformer in which the primary and secondary are in a single winding






13. The ratio of pulse width to period expressed as a percentage






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






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






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






17. 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






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






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






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






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






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






23. The mathematics of logic circuits






24. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






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

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26. The beginning address of a segment of memory






27. In Boolean algebra - the OR operation






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






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






30. 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






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






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






33. 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.






34. A receiving device on a bus






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






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






37. 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






38. 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.






39. In addition - the number that is added to another number called the augend






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






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






42. A digital counter having ten states






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






44. The actual current in a branch






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






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






47. 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






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






49. A group of eight bits






50. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte