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. A programming language that uses English like words and has a one- to- one correspondence to machine language






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






4. Having two opposites charge carriers within the transistor structure






5. A complex programmable logic device that consists basically of muliple SPLD arrays with programmable interconnections.






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






7. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






8. Dual in - line memory module






9. To decrease the binary state of a counter by one






10. 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.






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






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






13. 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.






14. 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.






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






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






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






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






19. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.


20. 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.






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






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






23. 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.






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






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


26. American wire gauge; a standardization based on wire diameter






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






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






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






30. The number of protons in a nucleus






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






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






33. Describes a number system with a base of ten






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






35. The beginning address of a segment of memory






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






37. A circuit with a complete current path






38. A combined coder and decoder






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






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






41. 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






42. 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






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






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






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






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 combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification


48. The process or sequence of operations carried out to program a target device






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






50. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.