Which one of the following ServletRequest interface method returns more than one value associated with parameter?
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getParameterValue()
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getParameters()
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getParamValues()
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getParameterValues()
The getParameterValues() method of the ServletRequest interface returns an array of String objects containing all of the values that the given request parameter has, or null if the parameter does not exist. The other methods do not exist or return single values.
To answer this question, we need to understand the difference between the methods getParameterValue() and getParameterValues() in the ServletRequest interface.
Option A) getParameterValue() - This option is incorrect because the getParameterValue() method returns a single value associated with a parameter. It does not return multiple values.
Option B) getParameters() - This option is incorrect because the getParameters() method returns a Map object containing all parameter names and their corresponding values. It does not specifically return multiple values associated with a single parameter.
Option C) getParamValues() - This option is incorrect because the getParamValues() method does not exist in the ServletRequest interface.
Option D) getParameterValues() - This option is correct because the getParameterValues() method returns an array of String objects containing all values associated with a parameter. If multiple values are associated with a parameter, this method allows you to retrieve all of them.
Therefore, the correct answer is option D. The getParameterValues() method returns more than one value associated with a parameter.