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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 binary digit - which can be either 1 or 0






2. 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






3. The maximum value of a voltage or current






4. 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.






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






6. 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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7. 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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8. To decrease the binary state of a counter by one






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






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






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






12. Describes a number system with a base of ten






13. A type of IC package whose leads must pass through holes to the other side of a PC board






14. Dual in - line memory module






15. In addition - the number to which the addend is added






16. In Boolean algebra - the OR operation






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






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






19. Burst extended data output dynamic random- access memory






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






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






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






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






24. 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






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






26. Data Terminal equipment






27. Data Communications equipment






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






29. American Standard Code for Information Interchange; the most widely used alphanumeric code.






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






31. Characterized by ten states or values






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






33. The process of converting an analog signal to digital form






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






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

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






37. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






38. 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.






39. A group of eight bits






40. 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






41. 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






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






43. Characteristic of cells in a Karnaugh map in which there is a single- variable change from one cell to another cell next to it on any of its four sides






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






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






46. A type of magnetic tape format






47. An arrangement of electrical and/or electronic components interconnected in such a way as to perform a specified function






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






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






50. The beginning address of a segment of memory