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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. In a division operation the quantity that is being divided






2. A resettable protective device used for interrupting execessive current in an electric circuit






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






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






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






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






8. 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






9. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






10. The ratio of pulse width to period expressed as a percentage






11. Data Terminal equipment






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






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






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






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






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






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






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






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






20. American National Standards Institute






21. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






22. 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






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






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






25. 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






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






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






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






29. 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






30. Describes a number system with a base of ten






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






32. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






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






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






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






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






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






38. 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.






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






40. 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






41. A type of magnetic tape format






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






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






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






45. A logic gate that produces a High output only when all of the inputs are HIGH






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






47. The unit of electrical current






48. 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.






49. A code within DOS that allows various operations on files and includes a primitive assembler; to eliminate a problem in hardware or software.






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