单项选择题X 纠错
A.The code will deadlock.
B.The code may run with no output.
C.An exception is thrown at runtime.
D.The code may run with output "0 6".
E.The code may run with output "2 0 6 4".
F.The code may run with output "0 2 4 6".
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多项选择题
A.The output could be 8-1,7-2,8-2,7-1
B.The output could be 7-1,7-2,8-1,6-1
C.The output could be 8-1,7-1,7-2,8-2
D.The output could be 8-1,8-2,7-1,7-2
单项选择题
A.foo.notify();
B.bar.notify();
C.foo.notifyAll();
D.Thread.notify();
E.bar.notifyAll();
F.Object.notify();
多项选择题
A.0, 2, 4, 4, 6, 8, 10, 6
B.0, 2, 4, 6, 8, 10, 2, 4
C.0, 2, 4, 6, 8, 10, 12, 14
D.0, 0, 2, 2, 4, 4, 6, 6, 8, 8, 10, 10, 12, 12, 14, 14
E.0, 2, 4, 6, 8, 10, 12, 14, 0, 2, 4, 6, 8, 10, 12, 14
单项选择题
A.Compilation fails.
B.An exception is thrown at runtime.
C.The code executes normally and prints "bar".
D.The code executes normally, but nothing prints.
单项选择题
A.Cat
B.Dog
C.Compilation fails.
D.The code runs with no output.
E.An exception is thrown at runtime.
单项选择题
A.The Thread.sleep() method can take t1 as an argument.
B.The Object.notify() method can take t1 as an argument.
C.The Thread.yield() method can take t1 as an argument.
D.The Thread.setPriority() method can take t1 as an argument.
E.The Object.notify() method arbitrarily chooses which thread to notify.
多项选择题
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}
多项选择题
A.private synchronized Object o;
B.void go(){ synchronized(){/* code here */}
C.public synchronized void go(){/* code here */}
D.private synchronized(this) void go(){/* code here */}
E.void go(){ synchronized(Object.class){/* code here */}
F.void go(){ Object o = new Object(); synchronized(o){/* code here */}
单项选择题
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".
多项选择题
A.It is possible to synchronize static methods.
B.When a thread has yielded as a result of yield(), it releases its locks.
C.When a thread is sleeping as a result of sleep(), it releases its locks.
D.The Object.wait() method can be invoked only from a synchronized context.
E.The Thread.sleep() method can be invoked only from a synchronized context.
F.When the thread scheduler receives a notify() request, and notifies a thread, that thread immediately releases its lock.