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






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






3. 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.






4. 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






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






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






7. A series of bits describing a final design that is sent to the target device during programming






8. The rotational rate of a phasor which is related to the frequency of the sine wave that the phasor represents






9. Having two stable states. Flip- flops and latches are bistable multivibrators.






10. A receiving device on a bus






11. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






12. A resettable protective device used for interrupting execessive current in an electric circuit






13. A group of eight bits






14. Data Communications equipment






15. A set of interconnections that interface one or more devices based on a standardized specification






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






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






18. Digital Signal Processor; a special type of microprocessor that processes data in real time






19. Having two opposites charge carriers within the transistor structure






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






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






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

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






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






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






26. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






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






28. The digit generated when the sum of two binary digits exceeds 1






29. A nominally continuous electrical signal that varies in amplitude or frequency in response to changes in sound - light - heat - position - or pressure.






30. The maximum value of a voltage or current






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






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






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






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






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






36. The process of producing an output carry in full- adder when both input bits are 1s.






37. In Boolean algebra - the OR operation






38. Burst extended data output dynamic random- access memory






39. In a pulse waveform - the height or maximum value of the pulse as measured from its low level.






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






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






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






43. 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






44. Characterized by ten states or values






45. 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.






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






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






48. 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






49. Data Terminal equipment






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