This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
No. Suppose class A has method m() which throws exceptions X, Y and Z. Suppose class B extends A and overrides m(). Then m() of B can only throw: 1. X, Y, Z (some or all) 2. subclasses of X, Y, Z (some or all) 3. none at all but m() cannot throw exceptions W or U.