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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. 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






3. 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.






4. Consisting of numerals - letters - and other characters






5. A logic circuit used to add two binary numbers






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






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






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






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






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






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






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






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






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






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






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






17. Describes a number system with a base of ten






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






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






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






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






22. An array of AND gates consisting of a matrix of programmable interconnection






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






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






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

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26. A digital counter having ten states






27. 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.






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






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






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






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






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






33. Direct memory access; a method to directly interface a peripheral device to memory without using the CPU for control






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






35. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






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






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






38. A type of counter in which each stage is clocked from the output of the preceding stage.






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






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






41. Characterized by ten states or values






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






43. In Boolean algebra - the AND operation






44. 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.






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






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






47. 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.






48. A receiving device on a bus






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






50. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs