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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 digital counter having ten states






2. 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.






3. In addition - the number that is added to another number called the augend






4. A method of analog- to- digital conversion using a 1- bit quantization process






5. Characterized by ten states or values






6. 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.






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






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






9. The time from the application of a valid memory address to the appearance of valid output data






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






11. 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






12. A method for internally testing a PLD based on the JTAG standard (IEEE std.)






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






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






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






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






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






18. The unit of electrical current






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






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






21. The application of a dc voltage to an electronic device to produce a desired mode of operation






22. An electrical instrument used to measure current






23. In Boolean algebra - the AND operation






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






25. In Boolean algebra - the OR operation






26. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






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






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






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






30. Having two opposites charge carriers within the transistor structure






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






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






33. 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






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






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






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






37. A semiconductor device that conducts current in only one direction






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






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






40. The number of protons in a nucleus






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






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






43. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






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






46. 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






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






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






49. 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.






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