Question

If no Z is supplied in the substr(X, Y, Z) function, what happens?

1) An error occurs
2) The function returns an empty string
3) The function returns the substring starting from position Y to the end of the string X
4) The function returns the substring starting from position Y to position Z of the string X

Answer 1

If no Z is supplied in the substr (X, Y, Z) function, the correct behavior is "The function returns the substring starting from position Y to the end of the string X". Option C is the answer.

Step-by-step explanation:

In the substr (X, Y, Z) function, when the length parameter Z is omitted, the function assumes that the substring should extend from the starting position Y to the end of the string X. This behavior is useful when the developer wants to extract a substring without specifying the exact length, letting it go up to the end of the original string.

Option 1 suggests an error, which is incorrect; the function typically handles the absence of Z by defaulting to the end of the string. Options 2 and 4 provide inaccurate descriptions of the function's behavior.

Option C is the answer.