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






2. A combined coder and decoder






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






4. The actual current in a branch






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






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






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






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






9. A class of integrated logic circuits that is implemented with a type of field effect transistor






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






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






12. A digital counter having ten states






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






14. A logic circuit used to add two binary numbers






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






16. A type of magnetic tape format






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






18. Describes a number system with a base of ten






19. The beginning address of a segment of memory






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






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






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






23. 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.






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






25. 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






26. 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.






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






28. 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






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






30. 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






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






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






33. Consisting of numerals - letters - and other characters






34. 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






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






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






37. In addition (ORing) and multiplication (ANDing) of two variables the order in which the variables are ORed or ANDed makes no difference






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






39. A unit of logic in an FPGA that is made up of multiple smaller logic modules and a local programmable interconnect that is used to connect logic modules within the CLB






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






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






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






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






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






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






46. 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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47. A two terminal circuit containing voltage sources - current sources - and resistors can be modeled as a voltage source in series with a resistor






48. Digital Signal Processor; a special type of microprocessor that processes data in real time






49. 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






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