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






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






3. A method of analog- to- digital conversion using a 1- bit quantization process






4. 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.






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






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






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






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






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






10. 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.






11. The maximum value of a voltage or current






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






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






14. 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






15. A combined coder and decoder






16. Describes a number system with a base of ten






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






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






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






20. In Boolean algebra - the OR operation






21. Burst extended data output dynamic random- access memory






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






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






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






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






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






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






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






29. A programming language that uses English like words and has a one- to- one correspondence to machine language






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

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31. Data Communications equipment






32. A circuit with a complete current path






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






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






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






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






37. A digital counter having ten states






38. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






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






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






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






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






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






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






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






47. The actual current in a branch






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






49. 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






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