C Programming
Which of the following function is used to find the first occurrence of a given string in another string?

strchr()
strrchr()
strstr()
None of these
strnset()

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C Programming
String concatenation means -

Combining two strings.
Partitioning the string into two strings.
Comparing the two strings to define the larger one.
Extracting a substring out of a string.
Merging two strings.

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