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. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






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






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






4. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






5. A set of interconnections that interface one or more devices based on a standardized specification






6. 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.






7. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






8. In Boolean algebra - the OR operation






9. American National Standards Institute






10. 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






11. Burst extended data output dynamic random- access memory






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






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






14. Dual in - line memory module






15. Data Terminal equipment






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






17. 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






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






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






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






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






22. 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






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






24. A logic circuit used to add two binary numbers






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






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






27. The process or sequence of operations carried out to program a target device






28. 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






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






30. A complex programmable logic device that consists basically of muliple SPLD arrays with programmable interconnections.






31. The maximum value of a voltage or current






32. A digital circuit capable of counting electronic events - such as pulses - by progressing through a sequence of binary states.






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






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






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






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






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






39. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






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






41. A combined coder and decoder






42. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification


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


44. 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.






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






46. Characterized by ten states or values






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






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






49. An electrical instrument used to measure current






50. The beginning address of a segment of memory