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. 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






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






3. 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.






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






5. An electrical instrument used to measure current






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






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






8. Data Terminal equipment






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






10. 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.






11. 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






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






13. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)






14. 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.






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






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






17. A document that specifies parameter values and operating conditions for an integrated circuits or other device






18. The beginning address of a segment of memory






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






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






21. One of the three regions in a bipolar Junction transistor(North junction of NpN)






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






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






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






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






26. The unit of electrical current






27. 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.






28. 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






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






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






31. 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.






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






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






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






35. A binary digit - which can be either 1 or 0






36. 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






37. Burst extended data output dynamic random- access memory






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






39. The actual current in a branch






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






41. Characterized by ten states or values






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






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






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






45. The number of protons in a nucleus






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






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






48. American wire gauge; a standardization based on wire diameter






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






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