51. . . . . . . . . is the output produced by TextOutputFor mat, Hadoop default OutputFormat.
52. . . . . . . . . is a data migration tool added for archiving data.
53. . . . . . . . . is added for supporting writing single replica files in memory.
54. The CapacityScheduler supports . . . . . . . . queues to allow for more predictable sharing of cluster resources.
55. . . . . . . . . is another implementation of the MapRunnable interface that runs mappers concurrently in a configurable number of threads.
56. Users can bundle their Yarn code in a . . . . . . . . file and execute it using jar command.
57. In . . . . . . . . the default job is similar, but not identical, to the Java equivalent.
58. The simplest way to do authentication is using . . . . . . . . command of Kerberos.
59. In order to turn on RPC authentication in hadoop, set the value of hadoop.security.authentication property to . . . . . . . .
60. For running hadoop service daemons in Hadoop in secure mode . . . . . . . . principals are required.
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