Tag: technology

Questions Related to technology

What will be the result of running the following jsp file taking into account that the Web server has just been started and this is the first page loaded by the server?

technology programming languages

  1. 1)It won't compile

  2. 2)It will print the session id.

  3. 3)It will produce a NullPointerException as the getSession(false) method's call returns null, cause no session had been created.

  4. 4)It will produce an empty page.

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Correct Option: B

What statements are correct about the method PageContext.findAttribute(String name)?
technology programming languages

  1. 1) There is no such method.

  2. 2) It searches the attribute in all 4 scopes.

  3. 3) It searches the attribute in page scope.

  4. 4) The method is findAttribute(String name, int scope)

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Correct Option: B

. Which are mandatory elements of the web-resouce-collection element?
technology programming languages

  1. 1) web-resource-name

  2. 2) url-pattern

  3. 3) http-method

  4. 4) auth-constraint

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Correct Option: A,B

What are the types returned by the ServletContext method getResource and getResourceAsStream?
technology programming languages

  1. 1) ServletContext doesn't have one of these two methods.

  2. 2) String and InputStream

  3. 3) URL and InputStream

  4. 4) URL and StreamReader

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Correct Option: C

Which of the following statements regarding HttpRequest methods are correct?

technology programming languages

  1. 1) getHeaderNames returns an Enumeration

  2. 2) getHeaders returns a String[]

  3. 3) getHeaderValues returns a String[]

  4. 4) getIntParameter returns an int

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Correct Option: A

Which statements are correct about the method PageContext.include?

technology programming languages

  1. 1) There is no such method.

  2. 2) It has two paramters: request and response

  3. 3) It has one parameter of type String which is the relative URL of the page to include.

  4. 4) This method is appropiate to use within a Tag class.

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Correct Option: C,D

Which of the following statements PageConext methods pushBody and popBody are true?

technology programming languages

  1. 1) pushBody is called by the jsp container after doStartTag and before doAfterBdy

  2. 2) pushBody is called by the jsp container before doInitBody

  3. 3) popBody is called by the jsp container after doAfterBody and before doEndTag

  4. 4) popBody is called by the jsp container after doEndTag

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Correct Option: A,C

. Is it true that all tags have a parent tag,which is null for top-level tags, and is the innermost containing tag for nested tags.

technology programming languages

  1. 1) yes

  2. 2) no

  3. 3) only the second part of the statement is true.

  4. 3) only the first part of the statement is true.

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Correct Option: A

You are calling the method HttpServletResponse.sendRedirect(String path) and you want to make sure that the user continues in the same session. How do you that?

technology programming languages

  1. 1) By calling the method with an absolute path as the argument

  2. 2) By enconding the path with HttpServletResponse.endcodeURL method

  3. 3) By enconding the path with HttpServletResponse.endcodeRedirectURL method

  4. 4) If you use sendRedirect the session is lost.

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Correct Option: C

Which statements are true about the auth-constraint element?
technology programming languages

  1. 1) It only contains the element role-name (besides element description)

  2. 2) Only the role-name specified in security-role-ref can be used

  3. 3) It is a subelement of web-resource-collection

  4. 4) It is related to authentication

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Correct Option: A