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






2. 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






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






4. 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






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






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






7. 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






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






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






10. Having no stable state. An astable multivibrator oscillates between two quasi- stable states.






11. 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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12. Information in numeric - alphabetic - or other form.






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






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






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






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






17. In Boolean algebra - the OR operation






18. A circuit (digital service) that switches digital data from one input line to several output lines in a specified time sequence






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






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






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






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






23. A receiving device on a bus






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

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






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






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






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






29. 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.






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






31. An electrical instrument used to measure current






32. A circuit with a complete current path






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






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






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






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






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






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






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






41. 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.






42. 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






43. 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.






44. Having two opposites charge carriers within the transistor structure






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






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






47. A logic circuit used to add two binary numbers






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






49. The unit of electrical current






50. A type of semiconductor memory having capacitive storage cells that lose stored data over a period of time and therefore must be refreshed.






Can you answer 50 questions in 15 minutes?



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