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






2. A device used to convert an analog signal to a sequence of digital codes






3. A combined coder and decoder






4. A type of magnetic tape format






5. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs






6. Information in numeric - alphabetic - or other form.






7. In Boolean algebra - the AND operation






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






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






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






11. Burst extended data output dynamic random- access memory






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






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






14. 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.






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






16. 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.






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






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






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






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






21. Data Terminal equipment






22. 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






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






24. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






26. 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






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






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






29. 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






30. An adverse condition that could occur if two or more devices try to communicate at the same time on a bus






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






32. 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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33. 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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34. 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






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






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






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






38. 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






39. Having two opposites charge carriers within the transistor structure






40. The mathematics of logic circuits






41. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






42. The maximum value of a voltage or current






43. An electrical instrument used to measure current






44. 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.






45. 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






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






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






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






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






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