多项选择题
Given a header in an HTTP request： X-Retries：4 Which two retrieve the value of the header from a given ServletRequest request？ （）
A. request.getHeader （“X-Retries”）
B. request.getIntHeader （“X-Retries”）
C. request.getRequestHeader （“x-Retries”）
D. request.getHeaders （“X-Retries”）.get （0）
E. re request.getRequest Headers （“X-Retries”）. Get （0）
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单项选择题
After execution. What are the values for I and j？（）
A. i = 6 and j = 5
B. i = 5 and j = 5
C. i = 6 and j = 4
D. i = 5 and j = 6
E. i = 6 and j = 6 -
单项选择题
When is the Float object. Created in line 3. eligible for garbage collection？（）
A. just after line 5
B. just after line 6
C. just after line 7 （That is. As the method returns）
D. Never in this method -
单项选择题
Whichisthevalididentifier？（）
A. false
B. default
C. _object
D. a-class
