Which of the following statements about variable-length arguments (varargs) is true? a. A method can have multiple varargs parameters. b. Varargs parameters must be the first parameter in a method's parameter list. c. Varargs parameters can only accept an array of arguments. d. A method can have only one varargs parameter, and it must be the last parameter in the method's parameter list.
Question
Which of the following statements about variable-length arguments (varargs) is true? a. A method can have multiple varargs parameters. b. Varargs parameters must be the first parameter in a method's parameter list. c. Varargs parameters can only accept an array of arguments. d. A method can have only one varargs parameter, and it must be the last parameter in the method's parameter list.
Solution
The correct statement is d. A method can have only one varargs parameter, and it must be the last parameter in the method's parameter list.
Explanation: In Java, varargs (variable length arguments) allow you to pass an arbitrary number of arguments to a method. However, there are some rules:
- A method can have only one varargs parameter.
- The varargs parameter must be the last parameter in the method's parameter list because the varargs parameter is an array of parameters itself. If it were not the last parameter, the Java compiler would not be able to determine where the list of parameters for the varargs parameter ends and where the list of parameters for the next parameter begins.
- The varargs parameter can accept an array of arguments or individual arguments, which the Java compiler will automatically bundle into an array.
So, statements a, b, and c are false.
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