Which of the following is the default output format?
A. TextFormat
B. TextOutput
C. TextOutputFormat
D. None of the mentioned
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Point out the correct statement.
A. Hadoop does have the definition of group by itself
B. MapReduce JobHistory server run as same user such as mapred
C. SSO environment is managed using Kerberos with LDAP for Hadoop in secure mode
D. None of the mentioned
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Which of the following has high storage density?
A. ROM_DISK
B. ARCHIVE
C. RAM_DISK
D. All of the mentioned
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Point out the wrong statement.
A. The multiple of the queue capacity which can be configured to allow a single user to acquire more resources
B. Changing queue properties and adding new queues is very simple
C. Queues cannot be deleted, only addition of new queues is supported
D. None of the mentioned
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Point out the wrong statement.
A. getInstance() creates a new Job with particular cluster
B. getInstance(Configuration conf) creates a new Job with no particular Cluster and a given Configuration
C. getInstance(JobStatus status, Configuration conf) creates a new Job with no particular Cluster and given Configuration and JobStatus
D. all of the mentioned
Select an option to see the answer and solution.
Apache Hadoop YARN stands for . . . . . . . .
A. Yet Another Reserve Negotiator
B. Yet Another Resource Network
C. Yet Another Resource Negotiator
D. All of the mentioned
Select an option to see the answer and solution.
Point out the correct statement.
A. With TextInputFormat and KeyValueTextInputFormat, each mapper receives a variable number of lines of input
B. StreamXmlRecordReader, the page elements can be interpreted as records for processing by a mapper
C. The number depends on the size of the split and the length of the lines.
D. All of the mentioned
Select an option to see the answer and solution.
MapReduce has undergone a complete overhaul in hadoop is . . . . . . . .
Select an option to see the answer and solution.
Point out the correct statement.
A. When there is enough space, block replicas are stored according to the storage type list
B. One_SSD is used for storing all replicas in SSD
C. Hot policy is useful only for single replica blocks
D. All of the mentioned
Select an option to see the answer and solution.
. . . . . . . . takes node and rack locality into account when deciding which blocks to place in the same split.
A. CombineFileOutputFormat
B. CombineFileInputFormat
C. TextFileInputFormat
D. None of the mentioned
Select an option to see the answer and solution.
. . . . . . . . class allows you to specify the InputFormat and Mapper to use on a per-path basis.
A. MultipleOutputs
B. MultipleInputs
C. SingleInputs
D. None of the mentioned
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The . . . . . . . . is a framework-specific entity that negotiates resources from the ResourceManager.
A. NodeManager
B. ResourceManager
C. ApplicationMaster
D. All of the mentioned
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. . . . . . . . method clears all keys from the configuration.
A. clear
B. addResource
C. getClass
D. none of the mentioned
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The . . . . . . . . is responsible for allocating resources to the various running applications subject to familiar constraints of capacities, queues etc.
A. Manager
B. Master
C. Scheduler
D. None of the mentioned
Select an option to see the answer and solution.
Point out the wrong statement.
A. A Storage policy consists of the Policy ID
B. The storage policy can be specified using the "dfsadmin -setStoragePolicy" command
C. dfs.storage.policy.enabled is used for enabling/disabling the storage policy feature
D. None of the mentioned
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An input . . . . . . . . is a chunk of the input that is processed by a single map.
A. textformat
B. split
C. datanode
D. all of the mentioned
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. . . . . . . . is useful for iterating the properties when all deprecated properties for currently set properties need to be present.
A. addResource
B. setDeprecatedProperties
C. addDefaultResource
D. none of the mentioned
Select an option to see the answer and solution.
. . . . . . . . is the architectural center of Hadoop that allows multiple data processing engines.
A. YARN
B. Hive
C. Incubator
D. Chuckwa
Select an option to see the answer and solution.
Point out the wrong statement.
A. From the system perspective, the ApplicationMaster runs as a normal container
B. The ResourceManager is the per-machine slave, which is responsible for launching the applications' containers
C. The NodeManager is the per-machine slave, which is responsible for launching the applications' containers, monitoring their resource usage
D. None of the mentioned
Select an option to see the answer and solution.
Which of the following storage policy is used for both storage and compute?
A. Hot
B. Cold
C. Warm
D. All_SSD
Select an option to see the answer and solution.