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. The maximum value of a voltage or current






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






3. 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.






4. In Boolean algebra - the OR operation






5. A VHDL feature that can be used to predefine the logic function for multiple use throughout a program or programs






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






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






8. 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






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






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






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






12. 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.






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






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






15. A number given in ampere- hours determined by multiplying the current times the length of the time (h) a battery can deliver that current to a load






16. 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.






17. Describes a number system with a base of ten






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






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






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






21. The actual current in a branch






22. The unit of electrical current






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






24. Dual in - line memory module






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






26. A binary digit - which can be either 1 or 0






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






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






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






30. 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






31. The number of protons in a nucleus






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






33. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






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






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






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






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






38. A receiving device on a bus






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






40. A circuit with a complete current path






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






42. 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






43. In Boolean algebra - the AND operation






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






45. 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.






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


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






48. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






49. The mathematics of logic circuits






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