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 logic circuit used to add two binary numbers






2. The actual current in a branch






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






4. 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.






5. 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






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






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






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






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






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






11. An energy source that uses a chemical reaction to convert chemical energy into electrical energy.






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






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






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






15. A digital counter having ten states






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






17. 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






18. A basic logic operation in which a true(high) output occurs only when all the input conditions are true (high)






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






20. The mathematics of logic circuits






21. In Boolean algebra - the OR operation






22. 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.






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






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






25. 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






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






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






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


29. A class of integrated logic circuits that is implemented with a type of field effect transistor






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






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






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






33. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






34. The unit of electrical current






35. A type of inductor used to block or choke off high frequencies






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






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






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






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






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






41. 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






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






43. One current path in a parallel circuit; a current path that connects two nodes






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






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






46. 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.






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






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






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






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