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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. 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






2. A type of magnetic tape format






3. Burst extended data output dynamic random- access memory






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






5. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






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






7. A type of inductor used to block or choke off high frequencies






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






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






10. Information in numeric - alphabetic - or other form.






11. The unit of electrical current






12. A receiving device on a bus






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






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






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






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






17. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously






18. In Boolean algebra - the AND operation






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






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






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






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






23. 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.






24. 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






25. 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.






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






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






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






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






30. 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






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






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






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






34. A device used to convert an analog signal to a sequence of digital codes






35. 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.






36. 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.






37. A digital counter having ten states






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






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






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






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






42. In Boolean algebra - the OR operation






43. A software compiler language for SPLD programming; a type of hardware description language (HDL)






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






45. 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






46. Describes a number system with a base of ten






47. 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.






48. Altera HDL; a nonstandard HDL






49. Consisting of numerals - letters - and other characters






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