Describe the steps a browser takes to determine whether to use an item from its cache.
What will be an ideal response?
A browser saves the Last-Modified date information along with the cached copy.
Before it uses a document from the local cache, a browser makes a HEAD request to the server
and compares the Last-Modified date of the server’s copy to the Last-Modified date on the
cached copy. If the cached version is stale, the browser downloads the new version. Algorithm
4.1 summarizes caching.
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Repeat Exercise 2 in Chapter 7, but use an instance of ArrayList instead of an array. Do not read the number of values, but continue to read values until the user enters a negative value.
What will be an ideal response?
Which of the following describes an IP address?
a. It is referred to as a dotted quad. b. It identifies any computer connecting to the Internet. c. It identifies a website. d. all of the above
In Excel, what keyboard combination allows you to display multiple lines of text in the same cell?
A) Ctrl+Enter B) Ctrl+W C) Shift+Enter D) Alt+Enter
A(n) ____ color scheme includes colors that are on opposite sides of a color wheel.
a. monochromatic b. analogous c. gradient d. complementary