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






2. A combined coder and decoder






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






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






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. Information in numeric - alphabetic - or other form.






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






8. 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.






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






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






11. The beginning address of a segment of memory






12. The actual current in a branch






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






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






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






17. A receiving device on a bus






18. Describes a number system with a base of ten






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






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






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






22. Consisting of numerals - letters - and other characters






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






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






25. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






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






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






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






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






30. 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






31. Data Terminal equipment






32. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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33. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






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






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






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






37. The total number of data units(bits - nibbles - bytes - words) that a memory can store.






38. In Boolean algebra - the AND operation






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






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






41. 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






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. 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






44. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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45. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






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






47. Having two opposites charge carriers within the transistor structure






48. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






49. A complex programmable logic device that consists basically of muliple SPLD arrays with programmable interconnections.






50. 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