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






2. Dual in - line memory module






3. 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.






4. In a division operation the quantity that is being divided






5. 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






6. Describes a number system with a base of ten






7. 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.






8. 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






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






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






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






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






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






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






15. 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.






16. In relation to VHDL feature that permits operations to be processed in a parallel;that is operations that occur simultaneously






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






18. 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






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






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






21. Burst extended data output dynamic random- access memory






22. 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.






23. A theorem that states that any amount of voltage sources and current sources can be combined into a single current source with a parallel resistor.

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24. A type of counter in which each stage is clocked from the output of the preceding stage.






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






26. A type of bistable multivibrator in which the output assumes the state of the D input on the triggering edge of a clock pulse.






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






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






29. The beginning address of a segment of memory






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






31. A group of eight bits






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

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






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






35. Data Communications equipment






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






37. Having two opposites charge carriers within the transistor structure






38. A connection at the midpoint of a winding in a transformer






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






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






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






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






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






44. A document that specifies parameter values and operating conditions for an integrated circuits or other device






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






46. A receiving device on a bus






47. One of the three regions in a bipolar junction transistor






48. American National Standards Institute






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






50. A semiconductor device that conducts current in only one direction