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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. The process of converting an analog signal to digital form






2. Describes a number system with a base of ten






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






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






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






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






7. A bidirectional set of conductive paths on which data or instruction codes are transferred into a microprocessor or on which the result of an operation is sent out from the microprocessor






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






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






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






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






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






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






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






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






16. American National Standards Institute






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






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






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






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






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






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






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






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






26. 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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27. A group of eight bits






28. 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






29. An electrical instrument used to measure current






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






31. A type of IC package whose leads must pass through holes to the other side of a PC board






32. The actual current in a branch






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






34. 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






35. The number of protons in a nucleus






36. 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.






37. To decrease the binary state of a counter by one






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






39. 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.






40. 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.






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






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






43. Having two opposites charge carriers within the transistor structure






44. Dual in - line memory module






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






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






47. Data Terminal equipment






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






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






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