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Questions Bank (1535446 total)

Match the correct material with each part. The part number is provided in brackets (#).

Sit die regte materiaal by elke onderdeel. Die onderdeelnommer word in hakkies (#) gegee

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Який тип телескопа зображено на рисунку?

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Consider a relation:

Employees (EmpID, Name, Age, Department)

With 10000 records, and frequent queries on Age.

Which indexing technique would improve query performance?

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Consider the following instances:

Which of the following relational operations will produce the following tuple only?

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Given the relations:

Orders (OrderID, CustomerID, OrderDate)

Customers (CustomerID, Name, Address)

Choose the correct relational algebra expression to retrieve the names of customers who placed orders in 2022.

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Consider the following schedule S involving five transactions T1,T2,T3,T4and T5:

Choose the correct option for the above transaction schedule.

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Consider the following precedence graph and identify the correct order of execution of the transactions. 

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Choose the incorrect option(s) about indexing from the following

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Suppose that one memory block in a disk can store either 32 key pointers or 12 whole records. If a database file contains 1056 records, how many memory blocks do we need to store the data file and the dense index?
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Consider the following relational schema for a university:

student(roll no, name, dob)

dept(deptNo, dName, location)

project(proj no, deptNo, roll no, pName)

Identify the correct relational algebraic expression for the following query: 

Find the names of students who have selected any project offered by the department “CSE”.

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