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






2. 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






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






4. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs






5. A logic circuit used to add two binary numbers






6. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






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






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






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






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






11. 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






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






13. An array of AND gates consisting of a matrix of programmable interconnection






14. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






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






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






17. 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.






18. A type of magnetic tape format






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






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






21. 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






22. A bridge circuit that is in the balanced state as indicated by 0 V across the output.






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






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






25. Data Terminal equipment






26. The beginning address of a segment of memory






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






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






29. The unit of electrical current






30. Having two opposites charge carriers within the transistor structure






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






32. A digital circuit device that converts coded information into another (familiar) or noncoded form






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






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






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






36. Characterized by ten states or values






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






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

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39. 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.






40. 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






41. American National Standards Institute






42. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






43. 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.






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






45. The mathematics of logic circuits






46. 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






47. Altera HDL; a nonstandard HDL






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






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






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