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. In Boolean algebra - the AND operation






2. 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






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






4. Having two opposites charge carriers within the transistor structure






5. Characterized by ten states or values






6. A type of magnetic tape format






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






8. The beginning address of a segment of memory






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






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






11. A digital counter having ten states






12. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






13. 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






14. The maximum value of a voltage or current






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






16. A circuit with a complete current path






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






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






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






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






21. An electrical device consisting of two conductive plates separated by an insulating material and possessing the property of capacitance.






22. 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.






23. 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






24. Describes a number system with a base of ten






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






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






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






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






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






30. 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.






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






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






33. 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.






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






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






36. 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.






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






38. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






39. 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






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






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






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






43. A receiving device on a bus






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






45. In Boolean algebra - the OR operation






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






47. Data Terminal equipment






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






49. Burst extended data output dynamic random- access memory






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