Multiple Choice
One important difference between a relation and a column family is that ________.
A) the rows in a column family can have different numbers of columns
B) the columns in a column family are unnamed
C) all values in a column family must have the same timestamp
D) values in a column family must be strings
Correct Answer:

Verified
Correct Answer:
Verified
Q28: XML stands for _.<br>A)Experimental Markup Language<br>B)Extendable Markup
Q31: SOAP was originally an XML-based standard for
Q58: A document database may use either XML
Q60: Column family databases may use columns,super columns,column
Q61: In XML Schema,there are two types of
Q63: Graph databases are composed of three elements,one
Q64: XML stands for Extensible Markup Language.
Q65: XML documents that are not-type-valid can still
Q66: In XML Schema,the default cardinality of elements
Q67: All type-valid XML documents are required to