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Does strcat() add a terminating null character?

  • A.Only if there is space
  • B.Always
  • C.Depends on the standard
  • D.Depends on the compiler

Answer: B

Correct answer: Always

strcat always writes a terminating null after the characters it appends - the result is a proper C string. That is why the destination must have room for the two strings and one more byte, and why the function cannot check whether that room exists.

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