What is the purpose of a web application firewall (WAF)? MCQ with Answer and Explanation

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What is the purpose of a web application firewall (WAF)?

A. To monitor and filter HTTP traffic to protect web applications

B. To manage domain names

C. To cache web content

D. To encrypt web traffic

Answer: Option A

Solution (By JKExamLibrary)

A WAF monitors, filters, and blocks HTTP traffic to and from a web application to protect against common attacks such as SQL injection and XSS.

This question belongs to: Computer Internet and Web Technologies

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What does a web browser perform when executing a 'DNS Lookup' operation?

A. It downloads heavy multimedia files to local cache blocks.

B. It clears out localized hardware registry errors.

C. It queries DNS servers to resolve a domain name string into its underlying IP address.

D. It establishes a secure tunnel path via proxy configurations.

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Correct Answer: Option C

Explanation:
DNS resolution looks up human-readable text domain destinations to find their matching numerical IP addresses so network connections can be established.

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What is the function of the 'DOCTYPE' declaration in HTML?

A. To specify the HTML version and standards mode

B. To set the page title

C. To link to an external stylesheet

D. To define the character encoding

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Correct Answer: Option A

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The DOCTYPE declaration tells the browser which version of HTML to use and triggers standards mode for proper rendering.

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What is the purpose of the 'accept-charset' attribute in an HTML form?

A. To validate input

B. To specify the character encodings accepted for form submission

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Correct Answer: Option B

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The accept-charset attribute specifies the character encodings that the server accepts when the form is submitted.

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