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






2. In Boolean algebra - the AND operation






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






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






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






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






7. 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.






8. A type of PLD nonvolatile programmable link that can be left open or can be shorted once as directed by the program






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






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






11. Dual in - line memory module






12. One of the three regions in a bipolar junction transistor






13. 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






14. 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.






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






16. In Boolean algebra - the OR operation






17. The unit of electrical current






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






19. Consisting of numerals - letters - and other characters






20. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






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






22. One of the three regions in a bipolar Junction transistor(North junction of NpN)






23. Having two stable states. Flip- flops and latches are bistable multivibrators.






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






25. 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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26. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






27. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






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






29. A combined coder and decoder






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






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






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






33. A logic circuit used to add two binary numbers






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






35. Having two opposites charge carriers within the transistor structure






36. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






37. An electrical instrument used to measure current






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






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






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

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






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






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






44. Sum of all the voltage drops in series equals to the source voltage

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






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






47. 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






48. 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






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






50. 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.







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