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 ability of a capacitor to store electrical charge.






2. A program that converts English- like mnemonics into machine code






3. The process of producing an output carry in full- adder when both input bits are 1s.






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






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






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






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






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






9. 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






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






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






12. A receiving device on a bus






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






14. The number of protons in a nucleus






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. 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.






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






18. The maximum value of a voltage or current






19. A transformer in which the primary and secondary are in a single winding






20. 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






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






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






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






24. An expression of variables and operators used to express the operation of a logic circuit






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






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






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






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






29. 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






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






31. A condition where all the load currents are equal and the neutral current is zero






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






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






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






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






36. A circuit with a complete current path






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






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






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






40. 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.






41. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






42. 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






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






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






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






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






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






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






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






50. Burst extended data output dynamic random- access memory