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






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






3. 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.






4. The process or sequence of operations carried out to program a target device






5. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.






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






7. 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






8. The number of protons in a nucleus






9. Describes a number system with a base of ten






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






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






12. 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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13. 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.






14. Consisting of numerals - letters - and other characters






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






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






17. Altera HDL; a nonstandard HDL






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






19. 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






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






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






22. 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






23. Data Communications equipment






24. A method of analog- to- digital conversion using a 1- bit quantization process






25. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously






26. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






27. A group of eight bits






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






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






30. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






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






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






33. 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






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






35. A combined coder and decoder






36. The mathematics of logic circuits






37. Burst extended data output dynamic random- access memory






38. 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






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






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






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






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

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43. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






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






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






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






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






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






50. The unit of electrical current







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