CIW Cheat Sheet 2026

The 30 highest-yield CIW facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. In internet marketing, what is a conversion rate? → The percentage of website visitors who complete a desired action
2. Which file format is best suited for photographic images on the web due to its lossy compression? → JPEG
3. What is SQL injection? → An attack that inserts malicious SQL code into input fields to manipulate a database
4. A network administrator wants to limit broadcast domains without using a router. Which technology should be used? → VLAN
5. Which principle of web design states that related elements should be grouped together visually? → Proximity
6. Which of the following methods will aid in safeguarding your computer from malware attacks? → Update the definitions for your malware protection application frequently
7. What is the purpose of a shopping cart on an e-commerce website? → Allow customers to select and temporarily hold items before purchasing
8. Which SQL clause is used to filter groups after a GROUP BY operation? → HAVING
9. Which CSS property controls the space between the content and the border of an element? → padding
10. Which protocol operates at Layer 3 of the OSI model and is responsible for logical addressing and routing? → IP
11. Which HTML5 semantic element is most appropriate for the main navigation links of a website? →
12. What does a 404 HTTP status code mean? → The requested resource was not found on the server
13. Which HTML element is used to create an unordered (bulleted) list? →
14. What is the CAN-SPAM Act designed to regulate? → Commercial email messages sent to consumers
15. Which SQL statement is used to retrieve data from a database? → SELECT
16. The information 2E22:4F00:000E:00D0:A267:97FF:FE6B:FE34 is referenced by which of the following? → An IPv6 address
17. Which CSS property is used to control the transparency of an element? → opacity
18. What class of intellectual property comprises company strategies, confidential software, and sales agreements? → Trade secret
19. What type of attack involves an attacker intercepting communication between two parties without their knowledge? → Man-in-the-Middle (MitM)
20. In HTML, which attribute is used to specify an alternative text description for an image? → alt
21. What does the 'this' keyword refer to inside an arrow function? → The enclosing lexical context
22. In database design, what is denormalization? → Intentionally introducing redundancy to improve read performance
23. What is the primary function of a Content Management System (CMS) in web design? → Allow non-technical users to create and manage website content without coding
24. What is a payment gateway in e-commerce? → A service that authorizes and processes online credit/debit card transactions
25. Digital signatures confirm the sender's identity, the accuracy of the contents, and → Enforce non-repudiation
26. What is a firewall primarily used for in network security? → Monitor and control incoming and outgoing network traffic based on security rules
27. What is the primary purpose of a privacy policy on a website? → Inform users how their personal data is collected, used, and protected
28. What is the principle of least privilege in security? → Grant users only the minimum permissions necessary to perform their job functions
29. What does the HTML `` element semantically represent? → Self-contained content such as an image, diagram, or code snippet
30. Which type of SQL JOIN returns only rows where there is a match in both tables? → INNER JOIN