For a given Servletr...

多项选择题For a given Servletresponse response， which two retrieve an object for writing text data？（）

A. response.getWriter（）
B. response.getOutputStream（）
C. response.getOutputWriter（）
D. response.getWriter（） .getOutputStream（）
E. response.getWriter（Writer.OUTPUT_TEXT（）

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1.单项选择题
What is the result？（）

A. 
B. 50
C. ${5*10}
D. The JSP fails to execute

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2.单项选择题A JSP page needs to perform some operations before servicing the first request. Where can this be done？（）

A. within a method called jspInit
B. within the page directive of the JSP page
C. within a scriptlet at the top of the JSP page
D. within the XML element

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3.多项选择题
Which two successfully translate and result in a value of true？（）

A. ${true or false}
B. ${requestScope[foo][0] > 500}
C. ${requestScope[“foo”][1] = 420}
D. ${（requestScope[“foo”][0] lt 50） && （3 gt 2）

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4.单项选择题
Which EL expression， inserted at line 3 is valid and evaluated to “beanValue”？（）

A. ${bean}
B. ${value}
C. ${beanValue}
D. ${com.example.bean}
E. ${requestScope[“com.example.bean”]}
F. ${request.get（“com.example.bean”）.toString（）}

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5.单项选择题Which method must be used to encode a URL passed as an argument to HttpServletResponse.sendRedirect when using URL rewriting for session tracking？（）

A. ServletResponse.encodeURL
B. HttpServletResponse.encodeURL
C. ServletResponse.encodeRedirectURL
D. HttpServletResponse.encodeRedirectURL

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6.单项选择题
What is the result when a request is sent to MyServlet？（）

A. An IllegalStateException is thrown at runtime.
B. An InvalidSessionException is thrown at runtime.
C. The string “value=null” appears in the response stream.
D. The string “value=myAttributeValue” appears in the response stream.

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7.单项选择题
Which statement， inserted at line 16， unbinds an attribute from a session？（）

A. session.unbind（“key”）；
B. session.remove（“key”）；
C. session.removeAttribute（“key”）；
D. session.unbindAttribute（“key”）；
E. session.deleteAttribute（“key”）；

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8.单项选择题Which the statement is true about web container session management（）？

A. Access to session-scoped attributes is guaranteed to be thread-safe by the web container.
B. To activate URL rewriting， the developer must use the HttpServletResponse.setURLRewriting method.
C. If the web application uses HTTPS， then the web container may use the data on the HTTPS request stream to identify the client.
D. The JSESSIONID cookie is stored permanently on the client so that a user may return to the web application and the web container will rejoin that session.

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9.多项选择题 Which two are true？（）

A. Tag files can only be accessed using a tagdir attribute.
B. The sort.jsp page translates successfully and invokes the tag defined by beta.tag.
C. The sort.jsp page produces a translation error because a taglib directive must always have a uri attribute.
D. Tag files can only be placed in /WEB-INF/tags， and NOT in any subdirectories of /WEB-INF/tags.
E. The tagdir attribute in line 2 can be replaced by a uri attribute if a TLD referring to beta.tag is created and added to the web application.

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10.多项选择题Which the two are true about the JSTL core iteration custom tags？（）

A. It may iterate over arrays， collections， maps and strings.
B. The body of the tag may contain EL code， but not scripting code.
C. When looping over collections， a loop status object may be used in the tag body.
D. It may iterate over a map， but only the key of the mapping may be used in the tag body.
E. When looping over integers （for example begin1=’1’ end=’10’）， a loop status object may not be used in the tag body.

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