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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. The mathematics of logic circuits






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






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






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






5. 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






6. Describes a number system with a base of ten






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






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






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






10. A software compiler language for SPLD programming; a type of hardware description language (HDL)






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






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






13. 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






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






15. 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.






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

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17. Information in numeric - alphabetic - or other form.






18. Having two stable states. Flip- flops and latches are bistable multivibrators.






19. Burst extended data output dynamic random- access memory






20. 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






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






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






23. The actual current in a branch






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






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






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






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






28. Consisting of numerals - letters - and other characters






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






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






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






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






33. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






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






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






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

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37. 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






38. 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






39. Characterized by ten states or values






40. An electrical instrument used to measure current






41. The maximum value of a voltage or current






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






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






44. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






45. One of the three regions in a bipolar Junction transistor(North junction of NpN)






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






47. 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.






48. A type of magnetic tape format






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






50. 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