The only way to create a new layer is to click the New Layer command in the Layers panel menu.
Answer the following statement true (T) or false (F)
False
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Explain the difference between Priority 1, Priority 2 and Priority 3 checkpoints in the Web Accessibility Initiative.
What will be an ideal response?
What output is produced by the following code fragment?
``` for (int val = 200; val >= 0; val -= 1) if (val % 4 != 0) System.out.println(val); ```
Suppose that we use the deferred update protocol for the example in Figure 23.6. Show how the log would be different in the case of deferred update by removing the unnecessary log entries; then describe the recovery process, using your modified log. Assume that only redo operations are applied, and specify which operations in the log are redone and which are ignored.
What will be an ideal response?
(Modifications to the Multithreaded Tic-Tac-Toe Program) The programs of Fig. 20.6 and Fig. 20.7 implemented a multithreaded, client/server version of the game Tic-Tac-Toe. Our goal in developing this game was to demonstrate a multithreaded server that could process multiple connec- tions from clients at the same time. The server in the example is really a mediator between the two clients—it
makes sure that each move is valid and that each client moves in the proper order. The server does not determine who won or lost or if there was a draw. Modify the TicTacToeServer class to test for a win, loss or draw on each move in the game. The server should send to each client a message that indicates the result of the game when the game is over. What will be an ideal response?