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






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






3. 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.






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






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






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






7. Having two opposites charge carriers within the transistor structure






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






9. Consisting of numerals - letters - and other characters






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






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






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






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






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






15. 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






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






17. 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.






18. 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






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






20. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






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






22. 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






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. A combined coder and decoder






25. Data Communications equipment






26. A group of eight bits






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






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

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29. Transistor-Transistor Logic and is implemented with bipolar junction transistors






30. A type of magnetic tape format






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






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






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






34. The maximum value of a voltage or current






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






36. Burst extended data output dynamic random- access memory






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






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






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






40. A circuit with a complete current path






41. The mathematics of logic circuits






42. One of the three regions in a bipolar junction transistor






43. A document that specifies parameter values and operating conditions for an integrated circuits or other device






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






45. A resettable protective device used for interrupting execessive current in an electric circuit






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






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






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






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






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