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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. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






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






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






4. 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.






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






6. 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.






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






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






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






10. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






11. 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






12. 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






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






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






15. A unit of the cross - sectional area of a wire.






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






17. 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.






18. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






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






20. Data Communications equipment






21. Data Terminal equipment






22. 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






23. Consisting of numerals - letters - and other characters






24. 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.






25. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






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






27. 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






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






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






30. The unit of electrical current






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






32. One current path in a parallel circuit; a current path that connects two nodes






33. The maximum value of a voltage or current






34. The beginning address of a segment of memory






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






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






37. 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






38. A series of bits describing a final design that is sent to the target device during programming






39. The actual current in a branch






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






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

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42. The number of protons in a nucleus






43. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






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






46. A digital code in which each of the decimal digits - 0 through 9 - is represented by a group of four bits






47. 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






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






49. 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






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