SSD3_选择题题库..doc

SSD3 选择题题库 1.Which method must exist in every Java application? (a) begin (b) paint (c) init (d) main Correct answer is (d) 窗体顶端 2. Which of the following is a valid character literal in Java? (a) ; (b) = (c)  (d) a 窗体底端 2.A Java identifier may begin with all but which of the following? (a) $ (b) if (c) _ (the underscore) (d) 0 Correct answer is (d) 3.In the context of Java programming, garbage collection refers to (a) automatic balancing of parenthesis performed by some editors (b) removal of Java programs that could cause damage to a system (c) conversion of comments into Javadoc comments (d) automatic return of memory to the heap for objects no longer required by the program Correct answer is (d) 4.What will be output when the following Java program segment is executed? int x = 5; int y = 2; System.out.println(x+y); (a) 5+2 (b) 5 2 (c) 7 (d) 52 Correct answer is (c) 5. Which of the following parts of an if-else-statement is optional? (a) the if part (b) the else part (c) the parenthesis around the condition (d) the condition Correct answer is (b) 6.Which of the following is the Java loop construct typically used when the range is clear? (a) while-loop (b) for-loop (c) switch-loop (d) do-while-loop Correct answer is (b) 8.Consider the following Java program segment. import java.io.*; public class Test { public Test( ) { System.out.println(default); } public Test( int i ) { System.out.println(non-default); } public static void main(String[] args) { Test t = new Test(2); } } Which of the following will be output during execution of the program segment? (a) The line of text non-default followed by the line of text default (b) The line of text default followed by the line of text non-default (c) The line of text default (d) The line of text non-default Correct answer is (d) 9.What is the name of the JDK program that processes Javadoc comments? (a)