Figure 22.22 gives a Venn diagram showing the relationships between conflict serializability, view serializability, two-phase locking, and timestamping. Extend the diagram to include optimistic and multiversion concurrency control. Further extend the diagram to differentiate between 2PL and strict 2PL, timestamping without Thomas’ write rule, and timestamping with Thomas’ write rule.

Which of the following is not true about Web browsers?

A) Today, common web browsers include Microsoft Internet Explorer, Mozilla Firefox, Google Chrome, and Apple Safari. B) Users view web pages through a software application called a web browser. C) The first browsers only allowed for text to be viewed; images were not added to Web pages until the early 2000s. D) Web browsers such as Mosaic, Netscape Navigator, and Internet Explorer were released in the mid-1990s.

What command-line interface can be used to “wipe” an application database?

a. emulatorwipe b. JUnit c. cleardatabase d. sqlite3