单项选择题
A.HTTP does NOT support file upload operations.
B.The servlet constructor must NOT have any parameters.
C.The servlet needs a service method to dispatch the requests to the helper methods.
D.The doPut and doDelete methods do NOT map to the proper HTTP methods.
单项选择题 Given： 10.public void service（ServletRequest request， 11.ServletResponse response） { 12.ServletInputStream sis = 13.// insert code here 14.} Which retrieves the binary input stream on line 13？（）
单项选择题 You need to retrieve the username cookie from an HTTP request. If this cookie does NOT exist， then the cvariable will be null. Which code snippet must be used to retrieve this cookie object？（）
多项选择题 You are creating a servlet that generates stock market graphs. You want to provide the web browser withprecise information about the amount of data being sent in the response stream. Which twoHttpServletResponse methods will you use to provide this information？（）
