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 current left after the total load current is subtracted from the total current into the circuit






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






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






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






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






6. Consisting of numerals - letters - and other characters






7. 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






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


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






10. The number of protons in a nucleus






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






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






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






14. The actual current in a branch






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






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






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






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






19. Burst extended data output dynamic random- access memory






20. A method of analog- to- digital conversion using a 1- bit quantization process






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






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






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






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






25. A unit of the cross - sectional area of a wire.






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






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






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






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


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






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






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






33. 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.






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






35. Data Communications equipment






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






39. 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.






40. 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






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






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






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






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






45. American National Standards Institute






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






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






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






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






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