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






2. A binary digit - which can be either 1 or 0






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






4. The beginning address of a segment of memory






5. 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






6. 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






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






8. Describes a number system with a base of ten






9. The actual current in a branch






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






11. A group of eight bits






12. The mathematics of logic circuits






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






14. In Boolean algebra - the OR operation






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






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






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






18. 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






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






20. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






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






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






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






24. The maximum value of a voltage or current






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






26. A circuit with a complete current path






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






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






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






30. A programming language that uses English like words and has a one- to- one correspondence to machine language






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






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






33. A set of interconnections that interface one or more devices based on a standardized specification






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






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






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






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






38. In Boolean algebra - the AND operation






39. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






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






42. 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.






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






44. Dual in - line memory module






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






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






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






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






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






50. 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