Given: What is the result when the programmer attempts ……

单项选择题Given that the current directory is empty, and that the user has read and write permissions, and the following: Which statement is true?（）

A.Compilation fails.
B.The file system has a new empty directory named dir.
C.The file system has a new empty directory named newDir.
D.The file system has a directory named dir, containing a file f1.txt.
E.The file system has a directory named newDir, containing a file f1.txt.

单项选择题Given: Which code fragment, inserted at line 24, outputs 123abc 123abc ?（）

A.sb1.append("abc"); s1.append("abc");
B.sb1.append("abc"); s1.concat("abc");
C.sb1.concat("abc"); s1.append("abc");
D.sb1.concat("abc"); s1.concat("abc");
E.sb1.append("abc"); s1 = s1.concat("abc");
F.sb1.concat("abc"); s1 = s1.concat("abc");
G.sb1.append("abc"); s1 = s1 + s1.concat("abc");
H.sb1.concat("abc"); s1 = s1 + s1.concat("abc");

单项选择题Given: What is the result?（）

A.2
B.3
C.4
D.6
E.7
F.Compilation fails.

单项选择题Given: Which code, inserted at line 15, allows the class Sprite to compile?（）

A.Foo { public int bar() { return 1; }
B.new Foo { public int bar() { return 1; }
C.new Foo() { public int bar() { return 1; }
D.new class Foo { public int bar() { return 1; }

多项选择题Which two code fragments correctly create and initialize a static array of int elements?（）

A.
B.
C.
D.