Test your basic knowledge |

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 transformer in which the primary and secondary are in a single winding






2. 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.






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






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






5. 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






6. 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






7. The graph of a filter's frequency response showing the change in the output voltage to input voltage ratio expressed in dB as a function of frequency for a constant input voltage






8. A digital code in which each of the decimal digits - 0 through 9 - is represented by a group of four bits






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






10. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






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






13. 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.






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






15. The law that states ORing several variables and then ANDing the single variable with each of the several variables and the ORing the product






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






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






18. The beginning address of a segment of memory






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






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






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






22. A software compiler language for SPLD programming; a type of hardware description language (HDL)






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






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






25. The number of protons in a nucleus






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






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






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






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






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






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






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


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






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






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






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






37. Having two opposites charge carriers within the transistor structure






38. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






39. 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






40. Describes a number system with a base of ten






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






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






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






44. 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






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






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






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






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






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






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