<span>An attribute in a relation of a database that serves as the primary key of another relation in the same database is called a</span>
Answer:
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Explanation:
Two types of power supplies exist, DC-DC and AC-DC. DC-DC power supplies allow you to plug in electrical devices into car outlets or similar sources that supply direct current, or DC, power. These power supplies are not the most commonly used, though.
Classification of Power Supply and Its Different Types
OUTPUT = DC OUTPUT = AC
INPUT = AC Wall wart Bench power supplies Battery charger Isolation transformer Variable AC supply Frequency changer
INPUT = DC DC-DC converter Inverter Generator UPS
Cloud computing, also known as cloud services, cloud concepts or simply the cloud, is a paradigm that allows to offer computer services. through a network, which is usually the Internet.
(data persistence, authentication, messaging, etc.). for example, a Linux system, a web server, and a programming environment such as Perl or Ruby).
Commercial examples are Google App ,Microsoft Azure,
