Test your basic knowledge |

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 actual current in a branch






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






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






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






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






6. 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






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






8. 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.






9. In a pulse waveform - the height or maximum value of the pulse as measured from its low level.






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






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






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






13. American National Standards Institute






14. 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






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






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






17. 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






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






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






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






21. 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






22. Information in numeric - alphabetic - or other form.






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






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






25. The maximum value of a voltage or current






26. 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.






27. One current path in a parallel circuit; a current path that connects two nodes






28. A group of eight bits






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






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






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






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






33. 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






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






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






36. A type of magnetic tape format






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






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 process that prevents two sources from using a bus at the same time






40. Dual in - line memory module






41. The number of protons in a nucleus






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






43. 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






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






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






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






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






48. An electrical instrument used to measure current






49. Consisting of numerals - letters - and other characters






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