问题:单选题Which statement is true?()A A class’s finalize() method CANNOT be invoked explicitly.B super.finalize() is called implicitly by any overriding finalize() method.C The finalize() method for a given object is called no more than once by the garbage colle...
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问题:单选题Given: What is the result?()A TestAB TestBC Compilation fails.D An exception is thrown at runtime....
问题:多选题Which two statements are true about the hashCode method?()AThe hashCode method for a given class can be used to test for object equality and object inequality for that class.BThe hashCode method is used by the java.util.SortedSet collection class to or...
问题:单选题Given: 22.StringBuilder sb1 = new StringBuilder("123"); 23.String s1 = "123"; 24.// insert code here 25.System.out.println(sb1 + " " + s1); Which code fragment, inserted at line 24, outputs "123abc 123abc"?()A sb1.append(abc); s1.append(abc);B sb1.appe...
问题:单选题Given: What is the result?()A test endB Compilation fails.C test runtime endD test exception endE A Throwable is thrown by main at runtime....
问题:单选题Given: What is the result?()A 2.1.0B 2.1.1C 3.2.1D 3.2.2...
问题:单选题Given: What is the result?()A [1, 2, 3, 5]B [2, 1, 3, 5]C [2, 5, 3, 1]D [5, 3, 2, 1]E [1, 3, 5, 2]...
问题:单选题Given: What is the result?()A No output is produced. 1 2 3B No output is produced. 2 3 4C No output is produced. 1 2 3 4D An exception is thrown at runtime. 1 2 3...
问题:多选题Given: Which two statements are true?()AThe output could be 8-1 7-2 8-2 7-1BThe output could be 7-1 7-2 8-1 6-1CThe output could be 8-1 7-1 7-2 8-2DThe output could be 8-1 8-2 7-1 7-2...
问题:单选题Given: What is the result?()A BB The code runs with no output.C Compilation fails because of an error in line 12.D Compilation fails because of an error in line 15.E Compilation fails because of an error in line 18....
问题:多选题Given: 35.String #name = "Jane Doe"; 36.int $age = 24; 37.Double _height = 123.5; 38.double ~temp = 37.5; Which two statements are true?()ALine 35 will not compile.BLine 36 will not compile.CLine 37 will not compile.DLine 38 will not compile....
问题:多选题Given: Which four code fragments, inserted independently at line 7, will compile?()Apublic void m1() { }Bprotected void m1() { }Cprivate void m1() { }Dvoid m2() { }Epublic void m2() { }Fprotected void m2() { }...
问题:多选题A team of programmers is reviewing a proposed API for a new utility class. After some discussion, theyrealize that they can reduce the number of methods in the API without losing any functionality. If theyimplement the new design,which two OO principle...
问题:单选题Given: Which code, inserted at line 14, allows the Sprite class to compile?()A Direction d = NORTH;B Nav.Direction d = NORTH;C Direction d = Direction.NORTH;D Nav.Direction d = Nav.Direction.NORTH;...
问题:多选题Given: Which two methods, inserted independently at line 17, correctly complete the Sales class?()Adouble getSalesAmount() { return 1230.45; }Bpublic double getSalesAmount() { return 1230.45; }Cprivate double getSalesAmount() { return 1230.45; }Dprote...
问题:单选题Given: 1.package test; 2. 3.class Target { 4.public String name = "hello";5.} What can directly access and change the value of the variable name?()A any classB only the Target classC any class in the test packageD any class that extends Target...
问题:单选题Given: Which statement is true?()A Compilation fails because the hashCode method is not overridden.B A HashSet could contain multiple Person objects with the same name.C All Person objects will have the same hash code because the hashCode method is...
问题:单选题Given: 11.double input = 314159.26; 12.NumberFormat nf = NumberFormat.getInstance(Locale.ITALIAN); 13.String b; 14.//insert code here Which code, inserted at line 14, sets the value of b to 314.159,26?()A b = nf.parse( input );B b = nf.format( input );...