2.3) Which one is not one of the definitions of a NULL value?a) The attribute does not apply to this tuple (i.e. Not Applicable → NA)b) The data type is not suitable for the entry datac) The attribute value for this tuple is unknownd) The attribute value for this tuple will be determined latere) The value is known but absent2.4) Which below statement is not true for indexes?a) Each table may contain at most one clustered indexb) Each table may contain none to many non-clustered indexc) Actual data is kept in the leaf of non-clustered indexd) Indexes are used to store data and allow efficient data retrievale) Non-clustered indexes increase data retrieval performance but decreases data modification performance2.5) Which below is not one of the isolation levels in transaction processing?a) Consistent read b) Read uncommitted c) Read committed d) Repeatable read e) Serializable 2.3) Which one is not one of the definitions of a NULL value?a) The attribute does not apply to this tuple (i.e. Not Applicable > NA)b) The data type is not suitable for the entry datac) The attribute value for this tuple is unknownd) The attribute value for this tuple will be determined latere) The value is known but absent2.4) Which below statement is not true for indexes?a) Each table may contain at most one clustered indexb) Each table may contain none to many non-clustered indexc) Actual data is kept in the leaf of non-clustered indexd) Indexes are used to store data and allow efficient data retrievale) Non-clustered indexes increase data retrieval performance but decreases data modification performance2.5) Which below is not one of the isolation levels in transaction processing?a) Consistent readb) Read uncommittedc) Read committedd) Repeatable reade) Serializable1.

Answered: 2.3) Which one is not one of the…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

2.3) Which one is not one of the definitions of a NULL value?
a) The attribute does not apply to this tuple (i.e. Not Applicable → NA)
b) The data type is not suitable for the entry data
c) The attribute value for this tuple is unknown
d) The attribute value for this tuple will be determined later
e) The value is known but absent
2.4) Which below statement is not true for indexes?
a) Each table may contain at most one clustered index
b) Each table may contain none to many non-clustered index
c) Actual data is kept in the leaf of non-clustered index
d) Indexes are used to store data and allow efficient data retrieval
e) Non-clustered indexes increase data retrieval performance but decreases data modification performance
2.5) Which below is not one of the isolation levels in transaction processing?
a) Consistent read b) Read uncommitted c) Read committed d) Repeatable read e) Serializable