Which of the following is/are correct?

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Question:Which of the following is/are correct?

1.NameNode is the SPOF in Hadoop 1.x

2.NameNode is the SPOF in Hadoop 2.x

3.NameNode keeps the image of the file system also

4.Both (a) and (c)

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  1. Which of the following is/are correct?
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