Q1 : What is data manager in the Couchbase Server?
A : It is actually a functional block with some useful applications. Actually, it is responsible for the purpose of extracting, as well as storing the data from the applications. There are certainly other important tasks which it performs and without making an impact of the overall functionality of the software.
Q2 : What is Cluster Manager in Couchbase?
A : The cluster manager supervises the configuration and behavior of all the servers in a Couchbase cluster. It configures and supervises inter-node behavior like managing replication streams and re-balancing operations. It also provides metric aggregation and consensus functions for the cluster, and a RESTful cluster management interface.
Q3 : What do you know about a shared server and a dedicated server?
A : Organizations and businesses these days have the option to consider a server which is only dedicated to them. No other organization or business shares the same. On the other hand, a shared server is distributed among many businesses and it hosts a lot of businesses. The shared hosting has a low price for obvious reasons as compared to a dedicated server. Both have their own pros and cons associated with each other. For businesses with small data needs and basic applications, the shared server is a good option to be considered.
Q4 : Name the programming language which the Cluster Manager uses?
A : Erlang Programming Language
Q5 : In a database, how can you define a document?
A : It is nothing but a general entry made to a database. A document can have a specific ID related to it and the same can be used for locating the document in the server. The real application data remains present in the document and the same can be accessed anytime by the user whenever the need of same is realized by the user. Documents also provide basic information about a specific task that is important.
Q6 : What is Data Manager in Couchbase?
A : The data manager stores and retries documents in response to data operations from applications. It asynchronously writes data to disk after acknowledging to the client. Applications can optionally ensure data is written to more than one server or to disk before acknowledging a write to the client.
Q7 : Why do we use Couchbase Server?
A : Couchbase is designed for consistency and control, they lack agility, flexibility, and scalability. To execute multiple use cases, organizations are forced to deploy multiple types of databases.
Q8 : What are the benefits of using Couchbase?
A : It exposes a fast key-value store with managed cache for sub-millisecond data operations, purpose-built indexers for fast queries and a powerful query engine for executing SQL-like queries. For mobile and Internet of Things, environments Couchbase also runs natively on-device and manages synchronization to the server.
Q9 : What are the different Couchbase Server Editions?
A : Couchbase Server is available in several editions: enterprise, community, and open source.
Q10 : What are Data Structures in Couchbase?
A : Data structures in Couchbase are similar in concept to data structures in JavaScript:
Map is like a JavaScript Object and is a key-value structure, where a value is accessed by using a key string.
List is like a JavaScript array and is a sequential data structure. Values can be placed in the beginning or end of a list and can be accessed using numeric indexes.
Set is a wrapper over a list which provides the ability to handle unique values.
Q11 : What are the needs that the Couchbase Servers can easily satisfy?
A : There are certain needs that Couchbase server can easily fulfill. The first is assuring unified programming Interface can handle queries and search. In addition to this, mobile and Internet of Things demands can easily be fulfilled through this. Also, various tasks like the core database engine, analytics, SQL integrations, scale-out architecture, core database engine, as well as memory first architecture can easily be fulfilled.
Q12 : How Couchbase Data Platforms are useful in building the applications that are scalable?
A : It provides uniform, simple, quick and in fact a powerful application development API which always makes sure of applications that are good enough to be considered. As it can easily be deployed, the application needs can be fulfilled in a very short span of time. Intelligence can easily be added to the applications, time delays can be avoided and the overall downtime can be reduced up to a great extent.
Q13 : What are the different parts in the Basic N1ql Query?
A : A basic N1QL query has the following parts:
SELECT — The fields of each document to return.
FROM — The data bucket in which to look.
WHERE — The conditions that the document must satisfy.
Q14 : What are the capabilities of a core database engine?
A : There are certain abilities of the same which is very useful when it comes to managing the data of the applications. In addition to this, it is also good enough to be trusted for the document applications. The users can easily deploy its architecture anywhere they want. Other capabilities include caching of data, data persistence, as well as database management.
Q15 : What do you know about a shared server and a dedicated server?
A : Organizations and businesses these days have the option to consider a server which is only dedicated to them. No other organization or business shares the same. On the other hand, a shared server is distributed among many businesses and it hosts a lot of businesses. The shared hosting has low price for obvious reasons as compared to a dedicated server. Both have their own pros and cons associated with each other. For businesses with small data needs and basic applications, the shared server is a good option to be considered.
Q16 : Being an Open Source Technology, what are the other good things that you know about the Cloudbase?
A : In addition to open source technology, the Couchbase was released under Apache 2.0 license. It comes with a community and an enterprise edition. It has multiform capabilities that make it good enough to be considered for the long run.
Q17 : Do you think it’s vital to create a data bucket in the system? If so, why?
A : Yes, it is important. This is generally done because the server only prefers the data buckets when it comes to storing the data. When the server is installed, the default bucket gets created automatically.
Q18 : What do you know about the VBucket?
A : There are situations when the data needs to be divided or a portioning is performed in a logical manner. VBucket is an approach that is adapted for the same purpose. All the buckets present in the Couchbase get divided automatically if this option is enabled by the user. One of the best thing about this approach is the users can simply make sure of effective allocation of the data throughout a cluster.
Q19: What is Query Workbench?
A : The Couchbase Web Console provides a Query Workbench, at which you can compose and execute N1QL queries.
Q20 : What is the Importance of creating a Data Bucket?
A : It makes important to create a Data Bucket since the couchbase server stores the data in Data Buckets. The “Default” bucket is created when the couchbase server is installed. The capacity of a data bucket to store the data is up to 20MB. If required, additional data buckets can be added. The bucket creation will have a limit when there is no sufficient space in RAM. Ex: limit the RAM/ Quota usage for the default bucket to 100 MB.
Q21 : What does N1Ql stand for?
A : It stands for non-first normal form query language
Q22 : What is the strict upper limit on the storage capacity of a data bucket in Couchbase Server? Is it possible to extend the same?
A : Each data bucket is having a limit of 20MB. In case more storage is required, the same can be considered by taking the additional buckets into consideration.
Q23 : Name the elements which are present in the Couchbase Node?
A : Every Couchbase Node contains four elements. The elements have been mentioned below point-wise.
1. Index Service
2. Data Service
3. Cluster Manager component
4. Query Service
Q24 : How many TCP ports are there to listen to the requests?
A : There are two TCP ports that are used to listen to requests.
1. Port 11210
2. Port 11211
The 11210 follows the cluster expansion rule while the Port 11211 follows the hashing algorithm
Q25 : What sort of technical specialty is required to handle the Couchbase or to work with the same?
A : Basic knowledge about the network and computing is mandatory. Network communication basics, installation of the network and maintenance of the same are the other skills that are helpful. The other skills depending on the task assigned to you.