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






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






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






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






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






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






7. A group of eight bits






8. A type of magnetic tape format






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






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






11. The maximum value of a voltage or current






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






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






14. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






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






16. A class of integrated logic circuits that is implemented with a type of field effect transistor






17. The opposition of a capacitor to permit current; the reciprocal of capacitive reactance. The unit is the siemens.






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






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






20. In Boolean algebra - the AND operation






21. A method for the automated testing of printed circuit boards in which the board is mounted on a fixture that resembles a bed of nails that makes contact with test points






22. 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.






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






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






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






26. The process of rippling an input carry to become the output carry in a full- adder when either or both of the input bits are 1's and the input carry is a 1






27. American National Standards Institute






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






29. In Boolean algebra - the OR operation






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






31. The number of protons in a nucleus






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






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






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






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






36. 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.






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






38. A set of conductive paths hat connects the CPU to other parts of the computer to coordinate its operations and to communicate with external devices






39. A combined coder and decoder






40. The mathematics of logic circuits






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






42. The actual current in a branch






43. 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






44. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






45. Consisting of numerals - letters - and other characters






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






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






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






49. 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.






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