GCP Associate Cloud Engineer Practice Question

The command gsutil -m cp -c -n -r /data/export gs://daily-exports satisfies every stated need.

• The -m flag enables parallel execution, creating multiple concurrent upload threads that maximize throughput.
• The -n (no-clobber) option tells gsutil to skip objects that already exist at the destination, so previously uploaded files are left untouched and no checksum comparisons are required.
• The -c (continue) flag causes gsutil to skip files that were copied successfully in earlier attempts and to resume any partially completed resumable uploads, so rerunning the same command after an interruption finishes only the outstanding work.
• The -r option ensures the entire directory tree under /data/export is traversed and copied.

The other choices fall short:

• gsutil cp -r … runs single-threaded and cannot resume partial uploads automatically.
• gsutil -m rsync -r … performs additional object listing and checksum comparisons and, without extra flags, may overwrite changed files instead of strictly skipping existing ones.
• gcloud storage cp --recursive … uploads files but, by default, does not provide the same level of parallelism, resume behaviour, or no-clobber protection as the gsutil command with -m, -c, and -n.