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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 circuit that prevents loading of an input or output






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






3. Data Terminal equipment






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






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






6. 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.






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






8. The normal level of a pulse waveform; the voltage level in the absence of a pulse.






9. Digital audio tape; a type of magnetic tape format






10. A circuit with a complete current path






11. The ability of a capacitor to store electrical charge.






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






13. 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






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






15. Information in numeric - alphabetic - or other form.






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






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






18. 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






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






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






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






22. Describes a number system with a base of ten






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






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






25. A combined coder and decoder






26. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative






27. 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






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






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






30. A type of magnetic tape format






31. 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.






32. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






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






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






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






37. 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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38. The process of converting an analog signal to digital form






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






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






41. 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.

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42. 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






43. A digital counter having ten states






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






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






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






47. Consisting of numerals - letters - and other characters






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






49. The unit of electrical current






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