Program in c language prime and collection in Java , sql joins , garbage collection

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The question covers topics in C, Java, and SQL including prime numbers, collections, SQL joins, and garbage collection.

To check if a number is prime in C, use a loop to check if it is divisible by any number less than itself.
In Java, collections are used to store and manipulate groups of objects. Examples include ArrayList, LinkedList, and HashSet.
SQL joins are used to combine data from multiple tables based on a common column. Examples include INNER JOIN, LEFT JOIN, and FULL OUTER JOIN.
Garbage collection in Java is the process of automatically freeing up memory that is no longer being used by the program.

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