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






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






3. Altera HDL; a nonstandard HDL






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






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






6. In a PLD - a matrix formed by rows of product- term lines columns of input lines with a programmable cell at each junctions. In VHDL - an array is an ordered set of individual items called elements with a single identifier name.






7. 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.






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






9. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






10. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification

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11. 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.






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






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

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14. Digital Signal Processor; a special type of microprocessor that processes data in real time






15. Describes a number system with a base of ten






16. An array of AND gates consisting of a matrix of programmable interconnection






17. 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.






18. A type of semiconductor memory that stores data in the form of charge packets and is serially accessed






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






20. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






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






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






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






24. Dual in - line memory module






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






26. The mathematics of logic circuits






27. 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






28. Consisting of numerals - letters - and other characters






29. 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






30. The application of a dc voltage to an electronic device to produce a desired mode of operation






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






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






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






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






35. 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






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






37. A group of eight bits






38. The unit of electrical current






39. The effect created when a signal is sampled at less than twice the signal frequency. Aliasing creates unwanted frequencies that interfere with the signal frequency.






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






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

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42. A stage of the DSP pipeline operation in which instructions are assigned to functional units and are decoded.






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






44. The maximum value of a voltage or current






45. The digit generated when the sum of two binary digits exceeds 1






46. In addition - the number to which the addend is added






47. Data Terminal equipment






48. Characteristic of cells in a Karnaugh map in which there is a single- variable change from one cell to another cell next to it on any of its four sides






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






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