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






2. The number of protons in a nucleus






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






4. 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.






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






6. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






7. Data Communications equipment






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






9. 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






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






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






12. Having two opposites charge carriers within the transistor structure






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






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






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






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






17. 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






18. A method for the automated testing of printed circuit boards in which the board is mounted on a fixture that resembles a bed of nails that makes contact with test points






19. 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.






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






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






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






23. 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






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






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






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






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






28. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






29. 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






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






31. 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






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






33. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






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






35. In addition - the number to which the addend is added






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






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






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






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






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






41. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






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






43. A type of semiconductor memory that stores data in the form of charge packets and is serially accessed






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






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






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






47. 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.






48. In Boolean algebra - the OR operation






49. 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






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