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






2. A type of magnetic tape format






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






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






5. 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






6. 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






7. Altera HDL; a nonstandard HDL






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






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






10. A binary digit - which can be either 1 or 0






11. The unit of electrical current






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






13. 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.






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






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






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






17. A reduction of the output signal compared to the input signal - resulting in a ratio with a value of less than 1 for the output voltage to the input voltage of a circuit.






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






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






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






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






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






24. 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






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






26. Data Communications equipment






27. American National Standards Institute






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






29. 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.






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






31. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






33. Characterized by ten states or values






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






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






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






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






38. Burst extended data output dynamic random- access memory






39. A logic circuit used to add two binary numbers






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






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






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






43. Describes a number system with a base of ten






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






45. 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






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






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






48. The mathematics of logic circuits






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






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