Test your basic knowledge |

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. 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






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






3. To decrease the binary state of a counter by one






4. 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






5. 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.






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






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






8. In Boolean algebra - the AND operation






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






10. A circuit with a complete current path






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






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






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






14. Describes a number system with a base of ten






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






16. 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






17. A receiving device on a bus






18. 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.






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






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






21. The maximum value of a voltage or current






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


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






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






25. 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






26. 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.






27. 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.






28. A combined coder and decoder






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






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






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






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






33. 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






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






35. Having two stable states. Flip- flops and latches are bistable multivibrators.






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






37. 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.






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






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






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






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






42. American National Standards Institute






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






44. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.






45. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






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






48. 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






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






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