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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 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






2. A type of magnetic tape format






3. The beginning address of a segment of memory






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






5. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






6. 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






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






8. 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






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






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






11. Dual in - line memory module






12. 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






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






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






15. A combined coder and decoder






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






17. 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






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






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






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






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






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






23. In Boolean algebra - the OR operation






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






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






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






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






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






29. 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.






30. Having two opposites charge carriers within the transistor structure






31. A logic circuit used to add two binary numbers






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






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






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






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






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






37. An expression of variables and operators used to express the operation of a logic circuit






38. 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.






39. A type of counter in which each stage is clocked from the output of the preceding stage.






40. 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.






41. The maximum value of a voltage or current






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






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






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






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






46. Consisting of numerals - letters - and other characters






47. Burst extended data output dynamic random- access memory






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






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






50. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.







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