DATABASE FUNDAMENTALS
BASICS OF BIG DATA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1
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2
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3
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Equal to as many columns in the column family
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Detailed explanation-1: -Basically, for HBase, the HFile is the underlying storage format. Per column family, there is one MemStore.
Detailed explanation-2: -The table that is represented by Table 1 has two column families: cfd and cfi. The cfd family has two columns with qualifiers cqnm and cqv. A column in HBase is referenced by using family:qualifier . The cfi column family has one column: cqdesc.
Detailed explanation-3: -Explanation. A single HF file can be associated with only one column family.
Detailed explanation-4: -An HBase table is made of column families which are the logical and physical grouping of columns. The columns in one family are stored separately from the columns in another family. If you have data that is not often queried, assign that data to a separate column family.
Detailed explanation-5: -HBase is a column-oriented non-relational database management system that runs on top of Hadoop Distributed File System (HDFS). HBase provides a fault-tolerant way of storing sparse data sets, which are common in many big data use cases.