Couchbase interview questions and Answers
Most Frequently Asked Couchbase interview questions
Couchbase server is basically a NoSQL database which is elastic, fast and also easy to use. Couchbase server is also known as Membase which means couchbase server is distributed, multi-model NoSQL file oriented database software packet. Couchbase server is considered for the standard application which has many uses and is broadly adopted in the modern-day approaches.
Why is it used?
Couchbase Server is a specialist in providing low-latency data management for a large-scale interactive mobile, web and also IoT applications. Some of the requirements which couchbase server fulfill include:-
- Unified Programming Interface
- Query
- Search
- Analytics
- Core database engine
- Scale-out architecture
- Memory-first architecture
- Big data and SQL integrations
- Full-stack security
- Container and Cloud deployments
| S.no | Couchbase | MongoDB |
|---|---|---|
| 1. | It gives seamless scalability | It gives multi-step scalability |
| 2. | It comes with high consistency | It comes with low consistency |
| 3. | The uptime of Couchbase is always up | The uptime of MongoDB needs maintenance |
The key features of the Couchbase Server are as follows:-
- Fast – Couchbase Server is high-speed and it process complex requests in a short time. Couchbase Server provides low latency and high throughput. The performance cost is also very low.
- Simple – Couchbase Server is straightforward to understand, manage, install, expand and use. In the couch. It is not essential to create and maintain the schemas in a couchbase server.
- Elastic – The Couchbase Server makes it very easy to relate the optimal quantity of resources to the ever-changing requirements of an application by distributing the data and me/O over virtual machines or over commodity servers. In couchbase server, the nodes can be extended from 1 to 100 tons and can also get reduced to uphold the application performance.
- Adaptive:- Couchbase servers adopt minor and significant changes in a straightforward way.
- Reliable – Couchbase server is very much stable and an enterprise-ready software, therefore, anyone can trust in mission-critical applications.
This is a fundamental Couchbase interview question.
| S.no | CouchDB | Couchbase |
|---|---|---|
| 1. | CouchDB can only store JSON documents | Couchbase stores key-values, therefore, it can store JSON documents, Binary data and many more |
Point to be noted: Go through this Q&A very thoroughly as this is one of the essential Couchbase interview questions.
Couchbase Server stores the data in a data bucket. It is essential to have a data bucket because of the couchbase server only chooses a data bucket for storing its data. When the couchbase server is installed then data bucket gets created by default. The data bucket can store up to 250MB data but if more data has to be added then new bucket can be created on if there is enough space in RAM.
A document is basically an entry which is made to a database. Each document has a specific ID, and this unique Id is used to locate the document in the server. The application data like information regarding price and description is stored in the document, and the user can access this application data a per his/her requirement. The document gives the primary information about a particular essential task
On the server not always but mostly the document is stored as a JSON because it is a well-structured format and it can be searched and queried subsequently.
In some situations when the data have to be divided in a logical manner. vBucket is adopted for this purpose of sharing the data. All the buckets which are there in the Couchbase automatically get divided if this option of the bucket is enabled by the user. One of the best features about the bucket approach is that the users can make sure of effective allotment of the data throughout a cluster.
This is one of the most asked Couchbase interview questions.
Data Manager is a functional block having some useful applications. Data Manager is accountable for the purpose of storing and extracting the data from applications. There are many other tasks which the Data manager performs without impacting the functionality of the software. The majority of the data manager code is written in C and in C++.