MariaDB Interview Questions and Answers
Ques 31. Explain the concept of the Query Cache in MariaDB. When is it beneficial, and are there any drawbacks?
The Query Cache in MariaDB is a mechanism for caching the results of SELECT queries, allowing subsequent identical queries to be served directly from the cache. While it can improve performance for certain scenarios, it has drawbacks such as potential contention issues and inefficiency for dynamic datasets.
Ques 32. What is the purpose of the OPTIMIZE TABLE statement in MariaDB?
The OPTIMIZE TABLE statement in MariaDB is used to reclaim storage space and defragment a table. It is particularly useful after significant changes or deletions in a table, as it can improve performance by optimizing the table's physical storage layout.
Ques 33. Explain the concept of the FEDERATED storage engine in MariaDB. When is it useful?
The FEDERATED storage engine in MariaDB allows access to data from a remote MariaDB server as if it were a local table. It is useful in scenarios where you need to integrate data from different databases or servers without physically replicating the data.
Ques 34. What is the purpose of the TINYINT data type in MariaDB?
The TINYINT data type in MariaDB is used to store very small integer values, typically ranging from -128 to 127 (signed) or 0 to 255 (unsigned). It is space-efficient and is suitable for columns that store boolean or small numeric values.
Ques 35. Explain the concept of the Galera Cluster in MariaDB. When is it used, and what benefits does it provide?
The Galera Cluster is a synchronous multi-master cluster for MariaDB that provides high availability and scalability. It allows for active-active replication, meaning that multiple nodes can accept both read and write operations concurrently. It is beneficial for applications requiring high availability and fault tolerance.
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