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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 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






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






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






4. A program that translates an assembly language program for one type of microprocessor to an assembly language for another type of microprocessor






5. A circuit that selects data from several inputs one at a time in a sequence and places them on the output; also called a multiplexer.






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






7. A device used to convert an analog signal to a sequence of digital codes






8. Digital audio tape; a type of magnetic tape format






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






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






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






12. The unit of electrical current






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






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






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






16. 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






17. 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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18. A type of magnetic tape format






19. The portion of the CPU that interfaces with the system buses and fetches instructions - reads operands - and writes results.






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






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






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 one- way group of conductors from the to a memory - or other external device - on which the address code is sent






24. 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.






25. Having two opposites charge carriers within the transistor structure






26. Sum of all currents entering a node is equal to the sum of all currents leaving the same node

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27. An energy source that uses a chemical reaction to convert chemical energy into electrical energy.






28. An electrical instrument used to measure current






29. Dual in - line memory module






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






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






32. 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






33. The application of a dc voltage to an electronic device to produce a desired mode of operation






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






35. To connect 'end- to- end' as when several counters are connected from the terminal count output of one counter to the enable input of the next counter






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






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






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






39. In Boolean algebra - the AND operation






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






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






42. Dynamic random- access memory; a type of semiconductor memory that uses capacitors as the storage elements and is a volatile - read/write memory






43. The actual current in a branch






44. Describes a number system with a base of ten






45. The mathematics of logic circuits






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






47. 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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48. A circuit with a complete current path






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






50. 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