Hadoop Set 1

LZO ✘ Bzip2 ✘ Gzip ✘ All of these ✔

Update ✘ Reset ✘ Alter ✘ Select ✔

WebHCat ✘ WebCat ✘ HWebCat ✘ HWebCatH ✔

Partitioner ✘ Compressor ✘ Controller ✘ All of these ✔

Read-only ✘ Write-only ✘ Read-write ✘ None of these ✔

Clear ✘ Keys.clear ✘ Clear.AllKeys ✘ Clear.Keys ✔

JobTracker ✘ DataNode ✘ TaskTracker ✘ TaskNode ✔

There is one JobTracker per Hadoop job. ✘ There is one JobTracker per Mapper. ✘ There is one JobTracker per node. ✘ There is one JobTracker per cluster. ✔

The output of the Reducer is the input to the Mapper. ✘ The output of the Mapper is the input to the Reduce. ✘ The output of the Reducer is the input to the Combiner. ✘ The input to the Mapper is the input to the Combiner. ✔

Copy ✘ Shuffle and sort ✘ Compress and send ✘ Send and copy ✔