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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. A group of eight bits






2. 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






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






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






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






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






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






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






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






10. A circuit with a complete current path






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






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






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






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






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






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






17. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)






18. 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.






19. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






21. The normal level of a pulse waveform; the voltage level in the absence of a pulse.






22. A digital circuit device that converts coded information into another (familiar) or noncoded form






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






24. Burst extended data output dynamic random- access memory






25. 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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26. 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






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






28. A complex programmable logic device that consists basically of muliple SPLD arrays with programmable interconnections.






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






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






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






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






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






34. Data Communications equipment






35. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






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






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






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






39. 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.






40. 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.






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






42. Characteristic of cells in a Karnaugh map in which there is a single- variable change from one cell to another cell next to it on any of its four sides






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






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






45. 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.






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






47. A binary digit - which can be either 1 or 0






48. 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






49. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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50. A semiconductor device that conducts current in only one direction