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






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






3. In a division operation the quantity that is being divided






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






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






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






7. 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.






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






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






10. 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






11. The process of producing an output carry in full- adder when both input bits are 1s.






12. A circuit with a complete current path






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






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






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






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






17. 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.






18. A digital counter having ten states






19. A condition where all the load currents are equal and the neutral current is zero






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






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






22. 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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23. The process of converting an analog signal to digital form






24. 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.






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






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






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






28. An electrical instrument used to measure current






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

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






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






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






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






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






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






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






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






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






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






41. Having two opposites charge carriers within the transistor structure






42. 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






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






44. Voltage Divider Rule in determining TEC Thevenin Equivalence Circuit






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






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






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






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






49. Basic input/output system; a set of programs in ROM that interfaces the I/) devices in a computer system






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