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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 device used to convert an analog signal to a sequence of digital codes






2. Having two opposites charge carriers within the transistor structure






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






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






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






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






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






8. 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.






9. 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






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






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






12. Dual in - line memory module






13. American National Standards Institute






14. The unit of electrical current






15. 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.






16. The mathematics of logic circuits






17. A circuit with a complete current path






18. Burst extended data output dynamic random- access memory






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






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






21. 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.


22. A type of magnetic tape format






23. A combined coder and decoder






24. 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.






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






26. 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






27. Having two values or states; describes a number system that has a base of two and utilizes 1 and 0 as its digits






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






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






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


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






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






33. Data Communications equipment






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






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






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






37. 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






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






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






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






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






42. Characterized by ten states or values






43. The maximum value of a voltage or current






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






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






46. 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






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






48. 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






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






50. American wire gauge; a standardization based on wire diameter