Hadoop 面试题与答案
相关差异对比
问题 31. What do you know by storage and compute node?
Storage node: Storage Node is the machine or computer where your file system resides to store the processing data.
Compute Node: Compute Node is a machine or computer where your actual business logic will be executed.
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问题 32. Is it necessary to know Java to learn Hadoop?
If you have a background in any programming language like C, C++, PHP, Python, Java, etc. It may be really helpful, but if you are nil in java, it is necessary to learn Java and also get the basic knowledge of SQL.
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问题 33. How to debug Hadoop code?
There are many ways to debug Hadoop codes but the most popular methods are:
- By using Counters.
- By web interface provided by the Hadoop framework.
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问题 34. Is it possible to provide multiple inputs to Hadoop? If yes, explain.
Yes, It is possible. The input format class provides methods to insert multiple directories as input to a Hadoop job.
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问题 35. What is the relation between job and task in Hadoop?
In Hadoop, A job is divided into multiple small parts known as the task.
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