题目内容

We thought the concert in the park would be popular but we didn’t anticipate so many people to turn up so early.

A. predict
B. foresee
C. expect
D. claim

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The research findings show that children normally feel a lot of anxiety about their first day at school.

A. greeds
B. blooms
C. worries
D. ambitions

如下在打印时,例如列簇若不加()就会打印出来乱码,乱码的原因是由于在底层,没有找准相关参数的位置,通过这两个方法(即偏移量的处理)就能精准的定位。public void get2() throws IOException {//1. 创建get对象Get get = new Get(Bytes.toBytes("001"));//2. 查询数据,返回结果对象Result result = table.get(get);//3. 获取cell的扫描器CellScanner cellScanner = result.cellScanner();//4. 遍历扫描器while(cellScanner.advance()) {//5. 获取单词扫描的CellCell cell = cellScanner.current();System.out.println(new String(cell.getFamilyArray(),cell.getFamilyOffset(), cell.getFamilyLength())); // 列簇System.out.println(new String(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierLength())); // 列名System.out.println(new String(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength())); // 列值}}

A. cell.getFamilyOffset()
B. cell.getFamilyLength()
C. cell.getFamilyArray()
D. result.cellScanner()

这里在打印时用了CellUtil.cloneFamily(cell)方法后,我们不需要自己去指定它的偏移量和长度,原因是CellUtil.cloneFamily(cell)方法中包含了()两个方法的功能,以免打印出来乱码,由于在底层,没有找准相关参数的位置,通过这个方法(即偏移量的处理)就能精准的定位。public void get3() throws IOException {//1. 创建get对象Get get = new Get(Bytes.toBytes("001"));//2. 查询数据,返回结果对象Result result = table.get(get);//3. 获取cell的扫描器CellScanner cellScanner = result.cellScanner();//4. 遍历扫描器while(cellScanner.advance()) {//5. 获取单词扫描的CellCell cell = cellScanner.current();System.out.println(new String(CellUtil.cloneRow(cell))); // 行键System.out.println(new String(CellUtil.cloneFamily(cell))); // 列簇System.out.println(new String(CellUtil.cloneQualifier(cell))); // 列名System.out.println(new String(CellUtil.cloneValue(cell))); // 列值}}

A. cell.getFamilyOffset()
B. cell.getFamilyLength()
C. cellScanner.current()
D. result.cellScanner()

HBase提供了一套Java API来支持Java程序对HBase数据库的请求操作。HBase API由Admin和Table两大类组成:Table类提供管理功能:建表、创建列族、检查表是否存在、修改表结构、修改列族结构和删除表。Admin类提供数据操作功能:完成向HBase进行存储和检索数据,以及删除无效数据等操作,包括CRUD操作。

A. 对
B. 错

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