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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 combined coder and decoder






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






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






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






5. 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






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






7. A code within DOS that allows various operations on files and includes a primitive assembler; to eliminate a problem in hardware or software.






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






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






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






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






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






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






14. The process of converting an analog signal to digital form






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






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






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






18. The actual current in a branch






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






20. 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.






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






22. 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






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






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






25. A circuit with a complete current path






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






27. A digital counter having ten states






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






29. In a PLD - a matrix formed by rows of product- term lines columns of input lines with a programmable cell at each junctions. In VHDL - an array is an ordered set of individual items called elements with a single identifier name.






30. In Boolean algebra - the AND operation






31. 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






32. Data Terminal equipment






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






34. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






35. The number of protons in a nucleus






36. 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






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






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






39. Consisting of numerals - letters - and other characters






40. 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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41. Data Communications equipment






42. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






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






44. A notational system for logic symbols that specifies input and output relationships thus fully defining a given function






45. 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






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






47. 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.






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






49. Dual in - line memory module






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