Relations produced from an E-R model will always be in
Relations produced from an E-R model will always be in
A1 NF
B2 NF
C3 NF
D5 NF
Friday, January 24, 2020
A driver's salary may not exceed Rs. 25,000 p.m. This is a
A driver's salary may not exceed Rs. 25,000 p.m. This is a / an
Aintegrity constraint
Breferential constraint
Cfeasibility constraint
Dlogical constraint.
Given the relational functional dependencies x —> w ; x ->y
Given the relational functional dependencies x —> w ; x ->y ; y -> z and z -> pq which of the following is NOT VALID ?
Ax -> z
Bx ->wy
Cy —> pq
Dw ->z
Which of the following is an example of multilevel indexing
Which of the following is an example of multilevel indexing ?
AA-tree
BB-tree
CDictionary
DNetwork.
The main reason for changing IP addresses from IPv4 to IPv6
The main reason for changing IP addresses from IPv4 to IPv6 is
Abetter technology
Bfaster transfer rate
Clesser number of collisions
DIPv6 provides more addresses than IPv4.
When secure data is to be transmitted over a network, encryp
When secure data is to be transmitted over a network, encryption and decryption are undertaken by the
Aphysical layer
Btransport layer
Cpresentation layer
Dsession layer.
Attributes in XML indicate
Attributes in XML indicate
Aa way of attaching properties to elements
Bthe elements
Cchild nodes
Ddocuments.
