Test your basic knowledge |

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 actual current in a branch






2. 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.






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






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






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






6. 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.






7. A circuit with a complete current path






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






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






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






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






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






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






14. American National Standards Institute






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






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






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






18. 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






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






20. Burst extended data output dynamic random- access memory






21. 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






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






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






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






25. A type of IC package whose leads must pass through holes to the other side of a PC board






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






27. 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






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






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






30. 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






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






32. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






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






34. Digital audio tape; a type of magnetic tape format






35. A type of magnetic tape format






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






37. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






38. A unit of the cross - sectional area of a wire.






39. 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.






40. 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






41. 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.






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


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






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






45. Characterized by ten states or values






46. 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






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






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






49. The mathematics of logic circuits






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