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






2. The actual current in a branch






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






4. 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






5. An electrical instrument used to measure current






6. The beginning address of a segment of memory






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






8. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






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






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






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






12. 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






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






14. In a division operation the quantity that is being divided






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






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






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






18. The digit generated when the sum of two binary digits exceeds 1






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






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






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






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






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






24. The time from the application of a valid memory address to the appearance of valid output data






25. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






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






27. 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.






28. 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






29. 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






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






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






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






33. 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.






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






35. A type of magnetic tape format






36. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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37. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






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






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






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






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






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






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






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






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






46. Characterized by ten states or values






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






48. 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.






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






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