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Identify the trigraph sequence for \.

  • A.??/
  • B.??=
  • C.??'
  • D.??!

Answer: A

Correct answer: ??/

The trigraph for the backslash is ??/. Trigraphs were introduced so that C could be written on terminals whose character sets lacked some of the symbols the language needs; the compiler replaces each three-character sequence in the very first phase of translation, before anything else.

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