【判断题】一个拓扑中包括spout和bolt两种角色,其中spout发送消息,负责将数据流以tuple元组的形式发送出去;而bolt则负责转换这些数据流,在bolt中可以完成计算、过滤等操作,bolt自身也可以随机将数据发送给其他bolt。
【单选题】Which of the following statements about trevor baylis is not true?
B.
he invented the clockwork radio.
C.
he was once an entertainer.
【多选题】下列关于批量计算和实时计算的说法,正确的有?
A.
批量计算:充裕时间处理静态数据,如Hadoop
B.
静态数据不适合采用批量计算,因为它不适合用传统的关系模型建模
【简答题】阅读理解 Free On-line Short Stories For Kids: Trevor The Taxi In this children's story, suited to younger children, we have an adventure with Trevor. He is a taxi. Trevor loves his life: 'Sometimes he tak...
【简答题】Tuple元组,内容___改变,但是允许___内部存在___等类型的元素,并且允许改变___的值,所谓内容不可变指的是在内存中指向的___是不变的
【简答题】【案例分析】 我国某内陆出口公司 A 于 2010 年 2 月向日本出口 30 公吨甘草膏, FOB 新港,共 54000 美元,装运期为 2 月 25 日之前,货物必须使用集装箱。 2 月上旬,货物运到天津,由 A 公司天津办事处负责装箱、装船。但货物在天津存仓后第二天,仓库起火,货物完全灭失。办事处不得不立即通知公司总部补发货物,否则将无法按期装船。当初应该使用何种术语才能避免不必要的损失?
【单选题】What will be the huge psychological shift Trevor mentioned at the end of the passage?
A.
The other three leaders all support Obama.
B.
Obama is an African-American president.
C.
None of the four leaders is white.
D.
The other three leaders except Obama are from Asian countries./
【单选题】tuple是含有10个元素的元组,下列说法不正确的是:
A.
访问tuple元组可以这样:tuple[1]
B.
访问tuple元组可以这样:tuple[:5]
D.
tuple = tuple[:5] + ("python",) + tuple[5:]
【单选题】what is Trevor's story mainly about?
A.
how he gave up smoking
B.
how he became interested in hypnotism.
C.
his experience as a soldier in the Army of Julius Caesar.