Hexaware Papers: Sample Questions 5 - 6 of 6

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Question number: 5

» Languages » C & C Plus Plus

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What is RISC?


(Reduced Instruction Set Computing) is a type of microprocessor that recognizes a relatively limited number of instructions. One advantage of reduced instruction set computers is that they can execute their instructions very fast because the instructions are so simple. Another, perhaps more important advantage, is that RISC require fewer transistors, which makes them cheaper to design and produce. Since the emergence of RISC computers, conventional computers have been referred to as CISC (Complex Instruction Set Computing).

Question number: 6

» Basic CS » Networks

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What are the advantages of fiber optics?


  • Fiber optic transmission is faster.

    Fiber optic versus copper wire transmission can be boiled down to the speed of photons versus the speed of electrons.

  • Fiber optic transmission results in less attenuation.

    When travelling over a long distance, fiber optic cables experience less signal loss than copper cabling. This is called low attenuation.

  • Fiber optic cables are impervious to electromagnetic interference (EMI).

    Copper wires, if not properly installed, will produce electromagnetic currents that can interfere with other wires and wreak havoc on a network. Fiber optic cables, unlike copper cables, do not conduct electricity.

  • Light cannot catch on fire.

    An added benefit of fiber optic cables is that they are not a fire hazard. This can also be attributed to the same reason that the cables do not produce EMI - there is no electric current travelling through the core.

  • Fiber optic cables do not break as easily.

    This means that you will not have to worry about replacing them as frequently as copper wires. Even though the fiber is made of glass, copper wires are more prone to damage than fiber optic cables are.