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






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






3. The number of protons in a nucleus






4. 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






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






6. 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.






7. A program that converts English- like mnemonics into machine code






8. 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






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






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






11. Having two opposites charge carriers within the transistor structure






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. Digital audio tape; a type of magnetic tape format






14. In Boolean algebra - the OR operation






15. A digital counter having ten states






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






17. The unit of electrical current






18. Burst extended data output dynamic random- access memory






19. A circuit with a complete current path






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

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21. Having two directions. the stored data can be shifted right or left






22. 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






23. The action of a circuit in which it accepts current into its output from a load






24. 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






25. Data Terminal equipment






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






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






28. 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.






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






30. Dual in - line memory module






31. The mathematics of logic circuits






32. A digital circuit that compares the magnitudes of two quantiities and produces an output indicating the relationship of the quantities






33. Consisting of numerals - letters - and other characters






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






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






36. 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.






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






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






39. Characterized by ten states or values






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






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

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42. 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






43. A connection at the midpoint of a winding in a transformer






44. The smallest particle of an element possessing the unique characteristics of that element.






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






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






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






48. A measure of the ability of a reactive circuit to permit current; the reciprocal of impedance. the unit is the siemens






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






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