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






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






3. The location of a given storage cell or group of cells in a memory; a unique memory location containing on byte






4. Data Terminal equipment






5. 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






6. 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.






7. A type of IC package whose leads must pass through holes to the other side of a PC board






8. 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.






9. A type of magnetic tape format






10. Describes a number system with a base of ten






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






12. 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






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






14. The main part of a computer responsible for control and processing of data; the core of a DSP that processes the program instructions






15. Dual in - line memory module






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






17. A combination of input literals that cannot occur and can be used as a 1 or 0 on a Karnaugh Map for simplification


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






19. A logic circuit used to add two binary numbers






20. Characterized by ten states or values






21. Altera HDL; a nonstandard HDL






22. The maximum value of a voltage or current






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


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






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






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






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






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






29. An electrical instrument used to measure current






30. 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






31. Consisting of numerals - letters - and other characters






32. The basic timing signal in a digital system; a periodic waveform in which the interval between pulses equals the time for one bit; the triggering input of a flip- flop






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






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






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






36. Arithmetic Logic Unit; the key processing element of a microprocessor that perfoms arithmetic and logic operations.






37. Bipolar junction transistor; a semiconductor device used for switching or amplification. A BJT has two junctions - the base- emitter junction and the base- collector junction






38. An instrument that can specify each of the other instruments on the bus as either a talker or a listener for the purpose of data transfer.






39. 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






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






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






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






45. A group of eight bits






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






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






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






49. 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.






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