Question

The so-called “ARC wars” led to the creation of this type of file in the late 1980s. This type of file is specified in a document named APPNOTE.TXT, which notes that each section is preceded by a “local file header” that starts with the bytes 0x50 (“hex 5 0”) and 0x4b (“hex 4 b”), or equivalently the uppercase letters P and K. Implode (15[1])is a (15[1])legacy method used to create this type of file, as are Shrink and Reduce, but version 2.04c introduced the now most popular method (*) Deflate. XPInstall files, (-5[1])which are an obsolete format for packaging extensions to Mozilla applications, are a special kind of this file, as are JAR files and modern Microsoft Office (10[1])documents. A notable (-5[1])file called “42” is only 42 kilobytes large but can produce a 4.5 petabyte file, making it a “bomb” of this file type. For 10 points, name this type of file that, like 7z and rar, is an archive that can hold multiple compressed files. ■END■ (10[1]0[1])

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