Given:

What is the result?（）

单项选择题Given: What is the output?（）

A.42
B.420
C.462
D.42042
E.Compilation fails.
F.An exception is thrown at runtime.

多项选择题Given: Which two can be results?（）

A. java.lang.RuntimeException: Problem
B. run.java.lang.RuntimeException: Problem
C. End of method.java.lang.RuntimeException: Problem
D. End of method.run.java.lang.RuntimeException: Problem
E. run.java.lang.RuntimeException: Problem End of method.

多项选择题Given: Which two changes, taken together, would guarantee the output: 1, 2, 3, 4, 5, ?（）

A.move the line 12 print statement into the foo() method
B.change line 7 to public synchronized void go() {
C.change the variable declaration on line 2 to private volatile int x;
D.wrap the code inside the foo() method with a synchronized( this ) block
E.wrap the for loop code inside the go() method with a synchronized block synchronized(this){ //for loop code here }

单项选择题Click the Exhibit button. What is the output if the main() method is run?（）

A.4
B.5
C.8
D.9
E.Compilation fails.
F.An exception is thrown at runtime.
G.It is impossible to determine for certain.

单项选择题Given: What can be a result?（）

A.Compilation fails.
B.An exception is thrown at runtime.
C.The code executes and prints "StartedComplete".
D.The code executes and prints "StartedComplete0123".
E.The code executes and prints "Started0123Complete".