Q1)WCAG contrast is compliant and fulfils theQ1)WCAG contrast is compliant and fulfils the

Q1)WCAG H37 can be related to this topic. is the abbreviation of “alternate”. It can replace the image when external address has some problemsQ2)It inspects all resources of website and shows all of its features including the errors too.It provides visual feedback about the accessibility of a web content by injecting icons and indicators into the page.Q3)The basic combination of color:black and white has 255 bright defference , 765 colour difference and 21 contrast ratio. Regardless which one is foreground colour or Background colour. For second try, I set the background color: white, and for foreground color #FF0000, #00FF00 and #0000FF which is pure red,green and blue. All these combinations satisfied the coulor difference which should be bigger than 500 by the value of 510. Blue has the biggest contrast ratio:8.592. Green was the least:1.372. Red’s color contrast was 3.998. Among these combinations, blue was the only colour that satisfies all standards. For the last try. I wanted to figure out that from what grey color, the color contrast is compliant and fulfils the requirements of every WCAG regulation. #595959 is the exact color. However, its colour difference was 498 which should be 500 or more. But #585858 has the value 501 and its contrast ratio is 7.114.Q4)Q)Advantage of Native app is that since it works with the device’s built-in features, they are easier to work with and also perform faster on the device. Also, these apps have to get the approval of the app store they are intended for, the user can be assured of complete safety and security of the app. Advantage of Web apps is that they are much easier to maintain, as they have a common code base across multiple mobile platforms. Since Web apps do not need to be approved by the app marketplace, they can be released at any time and in any form, as per the developer’s preferences.Q5)Internationalization is can be expressed as I118N, which means there are 18 letters between “I” and “N”. Unicode is one of the most representative examples of internalization. The main purpose of internalization is not to be limited by the different languages. The first version (1.0.0) of Unicode was released in October 1991, and the latest version (10.0.0) released in June 2017. The majot components of unicode are ISO / IEC 10646 Universal Character Set, UCS, UTF and other encoding methods, and character processing algorithms. Character breaking problem which was the limit of ASCII was solved by using ISO/IEC 10646 code table since it contains almost every chracter in the world. But it’s not realistic to manage over a million chracters, unicode administrates them with “Plane” which means the range that grouped code point. However, internalization needs not only universal character set: unicode but also requires efforts in various aspects. For instance, we need to secure enough data space for multiple byte character code and blank space for various sentence length that differs by languages and software and hardware should support unicode.Q6)The IP address of www.few.vu.nl is IP address of www.cs.vu.nl is We found it using https://www.site24x7.com/find-ip-address-of-web-site.html They are hosted at the same server vu.nlQ7)All ip adress of IPv4 depleted already. An IPv6 address consists of 128bit and that can make 2128 address. This will enable every electronic has its own IP adress, even a small some circuits in a device. IPv6 addresses are written in hexadecimal. They are separated by a colon (:) each 16bit:4 digits. The first 64bit of the 128bit is used as the network address and the after 64bit as the network interface address. Dual stack, Tunneling can transfer IPv4 to IPv6.Q8)MIME stands for Multi-purpose Internet Mail Extensions. MIME types form a standard way of classifying file types on the Internet. Internet programs such as Web servers and browsers all have a list of MIME types, so that they can transfer files of the same type in the same way, no matter what operating system they are working in.Common types: .text, .abc , .com , .cxx For Complete list: https://www.sitepoint.com/mime-types-complete-list/Q9)HEAD, POST, PUT, DELETE, OPTIONS and CONNECT are other methods.I chose HEAD. It functions similar with GET but it returns only HTTP headers except body. Headers contain matadata about recent modification time for an instance.