Advanced NoSQL Interview Question To Hire Experienced Candidates

Advanced NoSQL Interview Question To Hire Experienced Candidates

RahulApril 30th, 20214 min read

Companies are actively pursuing NoSQL specialists to assist them with their database activities as they are more information-driven than before. It's critical for your company to hire the right NoSQL developer. The right people on the development team will make all the difference.

Let's be honest, several businesses have difficulty finding qualified NoSQL developers. And, if they are good at seeking developers, how would they choose the appropriate NoSQL developer?

The individual who impresses you in interviews as well as in writing may not live up to your standards. Moreover, it doesn’t matter if you are tech-savvy or not, there are several online tools that will assist you. Tools like online code editors and other coding interview tools will help in making your job easier for you.

Although most developers have a basic knowledge of NoSQL, professional NoSQL developers have such a level of expertise that is well above that of the ordinary NoSQL developer.

So to test NoSQL developers, this article will show you how to test applicants for their qualifications, SQL interview questions, and recruit great NoSQL developers.

Things To Consider While Hiring NoSQL Developers

Interviewing anybody for any job is a difficult task in itself. However, it can be intimidating to be tasked with recruiting candidates in a profession where you have no prior experience.

Bearing that in mind, if you remember a few pointers and stick to the given guidelines, conducting interviews ought to be a piece of cake.

Almost any kind of developer job has its own needs and requirements. The same applies to NoSQL as well. The very first thing you ought to do is getting familiar with the subject.

There are a variety of resources available to assist you in locating the necessary information.

You could also seek the advice of a professional. You will gain a clearer understanding of the expectations of a NoSQL developer if you do so.

A Guide To Recruiting A NoSQL Developer

Here are a few pointers to help you recruit the perfect NoSQL developer for your business:

Understanding The Job Role Is The Key

This is one of the most crucial things you can do. For instance, a developer's main responsibility is to create websites or apps. However, you must confirm what the organization is aiming for and what its overall strategy is. It will help you assess the candidates better.

NoSQL Developer Skills

Here are some features to watch out for when looking for an experienced NoSQL developer:

  • Should be able to install, configure, upgrade, and patch database software (MySQL cluster, Cassandra, MySQL, and Couchbase)
  • Should be able to handle operations for both production and development databases
  • Should be able to troubleshoot NoSQL problems and performance delays
  • Should be able to make and configure monitors to set the health of servers and the databases
  • Should be able to develop, enforce, manage, and automate the backup and recovery architecture as per requirements
  • Should be able to effectively manage everyday replication processes
  • Should have a decent grasp of MongoDB’s aggregation framework
  • Should be experienced in working in a Windows or UNIX/Linux environment
  • Should be experienced in working with AWS, Microsoft Azure, Google Cloud Platform desirable

Preparing Interview Questions

You can begin working on questions after you've grasped the specifications. This implies that you should prepare a list of SQL Interview Questions. To help you recruit applicants for a senior-level NoSQL developer position, this list may also include senior SQL interview questions.

Here are some NoSQL interview questions:

  1. Give An Example Of Inserting Bulk Records To Redis
  2. What Is Cap Theorem? How Is It Applicable To Nosql Systems?
  3. Which of the following commands is correct when you want to fetch documents from a collection demo, where the value of a field ‘interest’ is null?
    1)  db demo.find( { "interest : null" } )
    2)  db demo.find().sort( { "interest" : null } )
    3)  db demo.find( { "interest" : null } )
  4. Which of the following is the correct command to update?
    1)  db.books.update( { item: "book", qty: { $gt: 7 } }, { $set: { x: 5 }, $inc: { y: 8} } , { multi: true } )
    2)  db.books.update( { item: "book", qty: { $gt: 7 } }, { $set: { x: 5 }, $inc: { y: 8} } )
    2)  db.books.find().update( { item: "book", qty: { $gt: 7 } }, { $set: { x: 5 }, $inc: { y: 8} } )
  5. What is the memory budget for a NoSQL database management system?
  6. What does the Oracle NoSQL database management scheme entail?
  7. What are the advantages and disadvantages of using a graph database for NoSQL databases?
  8. What are the various types of NoSQL data stores?
  9. What exactly is the CAP theorem? What does this mean for NoSQL systems?
  10. What exactly do you expect when you say "ultimate consistency" in relation to NoSQL databases?
  11. What does "Polyglot Persistence" in NoSQL mean to you?
  12. Explain The Structure Of Objectid In Mongodb.?
  13. Mention The Command To Insert A Document In A Database Called School And Collection Called Persons.?
  14. In the framework of NoSQL, explain what Document-oriented vs. Key-Value mean?
  15. Explain the BASE acronym in the sense of NoSQL.
  16. Why Mongodb Is Not Preferred Over A 32-bit System?
  17. Can You Configure The Cache Size For Mmapv1? How?
  18. In MongoDB, how do you get the foreign key -  primary key relationships?
  19. Write a query that equals to SQL command - Select emp_id from employees where designation=“Manager”;
  20. Which replica sets vote in the election of a primary replica set?

These are some of the many questions you can ask. Ensure you study and understand the answers to all the questions you intend to ask.

Make Use Of Online Resources

There's really nothing to be concerned about if you're aren't an expert coder or are familiar with the principles. To aid you to test the candidates' coding abilities, you should use online code editors and interview tools.

You can save time and resources if you use those interview tools. It would be much easier to find the best suit.

Final Thoughts

You ought to have a good idea of what you're supposed to be doing by now. If you implement the provided guidelines, you will have a much easier time finding a NoSQL creator.

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