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






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






3. A digital circuit device that converts coded information into another (familiar) or noncoded form






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






5. A connection at the midpoint of a winding in a transformer






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






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






8. A combined coder and decoder






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






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






11. The VHDL unit that describes the internal operation of a logic function; the internal functional arrangement of the elements that give a device its particular operating characteristics.






12. The unit of electrical current






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






14. A logic circuit used to add two binary numbers






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






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






17. The process of converting an analog signal to digital form






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






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






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






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






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






23. A document that specifies parameter values and operating conditions for an integrated circuits or other device






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






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


26. 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.


27. A electrical property of matter that exist because of an excess or a deficiency of electrons. Can be either positive or negative






28. 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.






29. 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






30. 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






31. 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






32. Consisting of numerals - letters - and other characters






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


34. American wire gauge; a standardization based on wire diameter






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






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






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






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






39. Having two values or states; describes a number system that has a base of two and utilizes 1 and 0 as its digits






40. Dual in - line memory module






41. A set of interconnections that interface one or more devices based on a standardized specification






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






43. Stands for Complementary Metal-Oxide Semiconductor and is implemented with a type of field transistor






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






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






46. 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






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






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






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






50. 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.