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






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






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






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






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






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






7. A reduction of the output signal compared to the input signal - resulting in a ratio with a value of less than 1 for the output voltage to the input voltage of a circuit.






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






9. An arrangement of electrical and/or electronic components interconnected in such a way as to perform a specified function






10. 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.






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






12. In Boolean algebra - the AND operation






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






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






15. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs






16. A digital counter having ten states






17. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






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






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






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






21. A circuit with a complete current path






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






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






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






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






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






27. Having two opposites charge carriers within the transistor structure






28. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






29. 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.






30. 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






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






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






33. A type of inductor used to block or choke off high frequencies






34. American National Standards Institute






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






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






37. Consisting of numerals - letters - and other characters






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






39. The unit of electrical current






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

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41. 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.






42. 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.






43. In Boolean algebra - the OR operation






44. Data Communications equipment






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






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






47. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






48. The process that prevents two sources from using a bus at the same time






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






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