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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. The unit of electrical current






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






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






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






5. 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.






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






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






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






9. A measure of the ability of a reactive circuit to permit current; the reciprocal of impedance. the unit is the siemens






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






11. Data Terminal equipment






12. 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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13. In Boolean algebra - the AND operation






14. 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






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

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16. 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






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






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






19. A digital counter having ten states






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






21. A group of eight bits






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






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






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






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






26. 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






27. The mathematics of logic circuits






28. A transformer in which the primary and secondary are in a single winding






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






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






31. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative






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






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






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






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






36. Digital audio tape; a type of magnetic tape format






37. 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






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






39. American National Standards Institute






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






41. 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.






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






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






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






45. 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






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

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






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






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






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