To add an AsyncListener to an AsyncContext, use the __________ method.

  • addAsyncListener()
  • addListener()
  • attachListener()
  • registerListener()
To add an AsyncListener to an AsyncContext, use the addAsyncListener() method.

In asynchronous servlets, the __________ method of AsyncContext sends the response to the client.

  • complete()
  • finish()
  • getResponseWriter()
  • sendResponse()
In asynchronous servlets, the complete() method of AsyncContext is used to send the response to the client.

To retrieve an AsyncContext object in a servlet, you use the __________ method of the HttpServletRequest.

  • getAsyncContext()
  • initAsync()
  • retrieveAsync()
  • startAsync()
To retrieve an AsyncContext object in a servlet, you use the getAsyncContext() method of the HttpServletRequest.

Which HTTP status code is typically sent by an HTTP servlet to indicate a successful response?

  • 200 OK
  • 302 Found
  • 404 Not Found
  • 500 Internal Server Error
The HTTP status code 200 OK is typically sent by an HTTP servlet to indicate a successful response. This status code signals that the request has been successfully processed, and the server is returning the requested resource.

To handle multiple file uploads, a servlet may use the __________ API.

  • Java Authentication and Authorization Service (JAAS)
  • Java Naming and Directory Interface (JNDI)
  • JavaBeans Activation Framework (JAF)
  • JavaMail
To handle multiple file uploads, a servlet may use the JavaBeans Activation Framework (JAF) API to work with various types of data, including files.

For secure file uploads, validating the __________ and __________ of the file is essential.

  • file name, content
  • file name, size
  • file type, content
  • file type, size
For secure file uploads, it's essential to validate both the file type and content to ensure the uploaded file is safe and meets the required criteria.

The response header __________ is crucial for indicating a file download rather than display.

  • Content-Type
  • File-Disposition
  • File-Type
  • Response-Content
The response header Content-Disposition is crucial for indicating a file download rather than display.

To read uploaded files in a servlet, the __________ method is commonly used.

  • doGet()
  • doPost()
  • init()
  • service()
To read uploaded files in a servlet, the doPost() method is commonly used.

For a file upload, the request type must be __________.

  • FILE
  • GET
  • POST
  • UPLOAD
For a file upload, the request type must be POST.

What is the role of the Content-Disposition header in file downloading?

  • Indicates the file size
  • Manages file encryption
  • Prompts for download
  • Specifies the file type
The Content-Disposition header plays a crucial role in file downloading by prompting the browser to download the file instead of displaying it. It specifies the disposition of the content, ensuring a proper download experience for users.

How can a servlet efficiently handle large file uploads without running out of memory?

  • Compress the file
  • Increase heap memory
  • Split the file into chunks
  • Use streaming API
To handle large file uploads efficiently, a servlet can use streaming APIs to process the file in smaller chunks, avoiding memory overflow. Increasing heap memory may not be a scalable solution, and splitting the file into chunks is a better approach.

What are the security concerns to consider while implementing file upload in servlets?

  • All of the above
  • Checking file size
  • Securing file storage location
  • Validating file types
When implementing file upload in servlets, it's crucial to consider security concerns such as validating file types, checking file size, and securing the file storage location to prevent vulnerabilities.