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Title: Big Data Analyst
Description: Big Data Analyst Roles and Responsibilities. At its core, Big Data analytics centers on uncovering and analyzing useful data like hidden trends and patterns so companies can make more informed business decisions and gain a competitive advantage.
Description: Big Data Analyst Roles and Responsibilities. At its core, Big Data analytics centers on uncovering and analyzing useful data like hidden trends and patterns so companies can make more informed business decisions and gain a competitive advantage.
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“Hadoop I/O”
...
Hadoop I/O Hadoop comes with a set of ________ for data I/O
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2
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a) The sequence file also can contain a “secondary” key-value list that can be used as file
Metadata
b) SequenceFile formats share a header that contains some information which allows the
reader to recognize is format
c) There’re Key and Value Class Name’s that allow the reader to instantiate those classes,
via reflection, for reading
d) All of the mentioned
Answer: d
Explanation: In contrast with other persistent key-value data structures like B-Trees, you
can’t seek to specified key editing, adding or removing it
...
Apache Hadoop ___________ provides a persistent data structure for binary key-value
pairs
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4
...
5
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a) The data file contains all the key, value records but key N + 1 must be greater than or
equal to the key N
b) Sequence file is a kind of hadoop file based data structure
c) Map file type is splittable as it contains a sync point after several records
d) None of the mentioned
Answer: c
Explanation: Map file is again a kind of hadoop file based data structure and it differs from
a sequence file in a matter of the order
...
Which of the following format is more compression-aggressive?
a) Partition Compressed
b) Record Compressed
c) Block-Compressed
d) Uncompressed
Answer: c
Explanation: SequenceFile key-value list can be just a Text/Text pair, and is written to the
file during the initialization that happens in the SequenceFile
...
The __________ is a directory that contains two SequenceFile
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8
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a) Array
b) Index
c) Immutable
d) All of the mentioned
Answer: b
Explanation: Index doesn’t contains all the keys but just a fraction of the keys
...
The _________ as just the value field append(value) and the key is a LongWritable that
contains the record number, count + 1
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10
...
a) Oozie
b) Avro
c) cTakes
d) Lucene
Answer: b
Explanation: Avro is a splittable data format with a metadata section at the beginning and
then a sequence of avro serialized objects
Title: Big Data Analyst
Description: Big Data Analyst Roles and Responsibilities. At its core, Big Data analytics centers on uncovering and analyzing useful data like hidden trends and patterns so companies can make more informed business decisions and gain a competitive advantage.
Description: Big Data Analyst Roles and Responsibilities. At its core, Big Data analytics centers on uncovering and analyzing useful data like hidden trends and patterns so companies can make more informed business decisions and gain a competitive advantage.