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






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






3. In addition (Oring) and multiplication (ANDing) of three or more variables - the order in which the variables are grouped makes no difference






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






5. 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






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






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






9. Burst extended data output dynamic random- access memory






10. An application program in development software packages that controls the design flow process and translates source code into object code in a format that can be logically tested or downloaded to a target device






11. An asynchronous input used to reset a flip- flop (make the Q output 0); to place a register or counter in the state in which it contains all 0's






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






13. Having two opposites charge carriers within the transistor structure






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






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






16. A combined coder and decoder






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






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






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






20. 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.






21. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






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


24. A interconnection of electrical components designed to produce a desired result. A basic circuits consists of a source - a load and an interconnecting current path.






25. A circuit that prevents loading of an input or output






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






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






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






29. A combination of logic gates interconnected to produce a specified Boolean function with no storage or memory capability; sometimes called combinatorial logic






30. In Boolean algebra - the OR operation






31. 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.






32. Altera HDL; a nonstandard HDL






33. The beginning address of a segment of memory






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






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






36. The current left after the total load current is subtracted from the total current into the circuit






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






38. 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






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






40. A connection at the midpoint of a winding in a transformer






41. Transistor-Transistor Logic and is implemented with bipolar junction transistors






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






43. A logic circuit used to add two binary numbers






44. A relatively small - high- speed memory that stores the most recently used instructions or data from the larger but slower main memory






45. The number of protons in a nucleus






46. 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.






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






48. 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






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






50. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor