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






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






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






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






6. 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






7. The average of a sine wave over one half- cycle. It is 0.637 times the peak value.






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






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






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






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






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






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






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






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






16. 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






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






18. Transistor-Transistor Logic and is implemented with bipolar junction transistors






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






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






21. The inverse of opposite of a number - in Boolean algebra - the inverse function - expressed with a bar over the variable. The complement of a 1 is a 0 - and vice versa






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






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






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






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






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






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






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






29. Dual in - line memory module






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






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






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






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






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






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






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






37. Burst extended data output dynamic random- access memory






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






39. The interval of time occupied by a single bit in a sequence of bits; the period of the clock






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






41. A logic gate that produces a High output only when all of the inputs are HIGH






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






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






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






45. A method for the automated testing of printed circuit boards in which the board is mounted on a fixture that resembles a bed of nails that makes contact with test points






46. 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






47. A circuit with a complete current path






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






49. The portion within the microprocessor that provides the timing and control signals for getting data into and out of the microprocessor and for synchronizing the execution of instructions.






50. The mathematics of logic circuits







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