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






2. Data Terminal equipment






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






4. 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






5. 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.






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






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






8. The number of protons in a nucleus






9. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






11. The unit of electrical current






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






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






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






15. In Boolean algebra - the AND operation






16. The process of producing an output carry in full- adder when both input bits are 1s.






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






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






19. 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






20. A digital counter having ten states






21. The application of a dc voltage to an electronic device to produce a desired mode of operation






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






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






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






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






26. A class of integrated logic circuits that is implemented with a type of field effect transistor






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






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






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






30. The actual current in a branch






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






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






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






34. The range of frequencies for which the current (or output voltage) is equal to or greater than 70.7% of its value at the resonant frequency that is considered to be passed by a filter.






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






36. Burst extended data output dynamic random- access memory






37. Dual in - line memory module






38. 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.






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






40. American wire gauge; a standardization based on wire diameter






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






42. In Boolean algebra - the OR operation






43. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






44. 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.






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






46. Digital Signal Processor; a special type of microprocessor that processes data in real time






47. A receiving device on a bus






48. The process of converting an analog signal to digital form






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






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