What is the maximum number of characters and spaces allowed in a tweet?

Which of the following is not true about the message to enable editing or enable content?

a. You might encounter these security features if you open a file from an e-mail or download files from the Internet. b. In Office 2010, some files open in Private View if the file appears to be from a potentially risky location, such as the Internet. c. These options are new security features in Office 2010 that protect your computer from malicious files by opening them in a restricted environment until you enable them. d. Trusted Documents is another security feature that remembers which files you have already enabled.

Which of the following statements is false?

a. A common way to perform synchronization is to use Java’s built-in monitors. b. Every object has a monitor and a monitor lock (or intrinsic lock). c. A monitor ensures that its object’s monitor lock is held by a maximum of two threads at a time. d. Monitors and monitor locks can be used to enforce mutual exclusion.