当前分类: SCJP程序员认证考试
问题:单选题1.public class test ( 2.public static void main (String args[]) { 3.int i = 0xFFFFFFF1; 4.int j = ~i; 5. 6.} 7.) What is the decimal value of j at line 5?()A 0B 1C 14D –15E An error at line 3 causes compilation to fail.F An error ...
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问题:多选题Which two statements are reserved words in Java?()ARunBImportCDefaultDImplement...
问题:单选题1. class SuperClass { 2. public a geta() { 3. return new a(); 4. } 5. } 6. class SubClass extends SuperClass { 7. public b geta() { 8. return new b(); 9. } 10. } Which is true?()A Compilation will succeed if a extends b.B Compilation will s...
问题:单选题public class Foo { public void main( String[] args ) { System.out.println( “Hello” + args[0] ); } } What is the result if this code is executed with the command line?()A HelloB Hello FooC Hello worldD Compilation fails.E The code does not ru...
问题:单选题1. public class Employee { 2. String name; 3. double baseSalary; 4. Employee(String name, double baseSalary) { 5. this.name = name; 6. this.baseSalary = baseSalary; 7. } 8. } And: 1. public class Salesperson extends Employee { 2. double commis...
问题:单选题What will be written to the standard output when the following program is run?() public class Q63e3 { public static void main(String args[]) { System.out.println(9 ^ 2); } }A 81B 7C 11D 0E false...
问题:11. public enum Title { 12. MR(”Mr.”), MRS(”Mrs.”), MS(”Ms....
问题:Which of the following statements are legal?() ...
问题:单选题1. class A { 2. public int getNumber(int a) { 3. return a + 1; 4. } 5. } 6. 7. class B extends A { 8. public int getNumber (int a) { 9. return a + 2 10. } 11. 12. public static void main (String args[]) { 13. A a = new B(); 14. Sy...
问题:单选题How can you create a listener class that receives events when the mouse is moved?()A By extending MouseListener.B By implementing MouseListener.C By extending MouseMotionListener.D By implementing MouseMotionListener.E Either by extending MouseMot...
问题:public class Test { public static void main(String Args[]) ...
问题:Which method is an appropriate way to determine the cosine o...
问题:public class Threads5 { public static void main (String[] a...
问题:多选题class A { } class Alpha { private A myA = new A(); void dolt( A a ) { a = null; } void tryIt() { dolt( myA ); } } Which two statements are correct?()AThere are no instanced of A that will become eligible for garbage collection.BExplicitly se...
问题:单选题String foo = “blue”; Boolean[]bar = new Boolean [1]; if (bar[0]) { foo = “green”; } What is the result? ()A Foo has the value of “”B Foo has the value of null.C Foo has the value of “blue”D Foo has the value of “green”E An exception is thro...
问题:单选题10. interface Foo { int bar(); } 11. public class Sprite { 12. public int fubar( Foo foo) { return foo.bar(); } 13. public void testFoo() { 14. fubar( 15. // insert code here 16.); 17. } 18. } Which code, inserted at line 15, allows the class ...
问题:单选题public class X { public static void main (Stringargs) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?()A The program runs and print...
问题:单选题public static void main(String[] args) { String str = “null‟; if (str == null) { System.out.println(”null”); } else (str.length() == 0) { System.out.println(”zero”); } else { System.out.println(”some”); } } What is the result?()A nullB zero...
问题:单选题//point X public class foo { public static void main (Stringargs) throws Exception { java.io.printWriter out = new java.io.PrintWriter { new java.io.outputStreamWriter (System.out), true; out.printIn(“Hello”); } } } Which statement at Po...
问题:Which statement is true for the class java.util.ArrayList?()...