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Describe the Composite Key Composite Key: Sometimes one key is not enough to uniquely recognize a row. E.g. in a single class Roll is enough to search a student, but in the w
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
The Locking Protocol: To manage concurrency related problems we use locking. A lock is mainly a variable that is associated with a data item in the database. A lock can be located
Explain the ACID properties of a transaction Ans: ACID properties are a significant concept for databases. The ACID stands for Atomicity, Consistency, Isolation, and Durability
Define Outer join Outer join - If there are any type of values in the one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
What is the use of a slotted-page structure and what is the information are there in the header? The slotted-page structure is used for organizing records within a one block.
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
Scenario: You are a freelance database designer who has just been contacted by a small software development company named Altair Software. The president of the company has asked
why are older data models are being replaced by new data models
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