There is a file test.txt in the root directory of the HDFS cluster. Which of the following commands can check the DatNode node information stored in this file?

Question

Options

• Ahdfs fsck /test.txt -files
• Bhdfs fsck /test.txt -locations
• Chdfs fsck /test.txt -blocks
• Dhdfs fsck /test.txt -list -corruptfileblocks

• A
  2% (1)
• B
  78% (35)
• C
  13% (6)
• D
  7% (3)

Explanation

hdfs fsck /test.txt -locations is correct because the -locations flag explicitly outputs the DataNode addresses where each block of the file is stored, directly answering "which DataNodes hold this file."

• A (-files) is wrong - it displays file-level metadata (name, size, replication factor) but omits block placement and DataNode details.
• C (-blocks) is wrong - it prints the block report (block IDs, sizes, replication counts) without revealing which DataNodes actually host those blocks.
• D (-list -corruptfileblocks) is wrong - -list-corruptfileblocks is a diagnostic flag for finding corrupted blocks, unrelated to inspecting healthy file placement.

Memory tip: Think of -locations as asking HDFS "where physically are the blocks?" - the answer is always a DataNode address. If you want DataNode info, you need location info.

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