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






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






3. In addition - the number that is added to another number called the augend






4. 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






5. In Boolean algebra - the AND operation






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






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






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






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






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






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






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






13. The ability of a capacitor to store electrical charge.






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






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






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






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






19. 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.






20. A combined coder and decoder






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






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






23. 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






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






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






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






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






28. A series of bits describing a final design that is sent to the target device during programming






29. 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






30. The actual current in a branch






31. 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.






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






33. In Boolean algebra - the OR operation






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






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






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






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






38. 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






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






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






41. A group of eight bits






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






43. A type of magnetic tape format






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






45. Dual in - line memory module






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






47. 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






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






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






50. American National Standards Institute