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All replicas have to have Enterprise Edition. If you run queries, backups, or DBCCs on a replica, you have to license it. For every server licensed with Software Assurance, you get one standby replica for free – but only as long as it’s truly standby, and you’re not doing queries, backups, or DBCCs on it.

For a really rough estimate, sum up the amount of uncompressed transaction log backups that you generate in a 24-hour period. You’ll need to push that amount of data per day across the wire. Things get trickier when you have multiple replicas – the primary pushes changes out to all replicas, so if you’ve got 3 replicas in your DR site, you’ll need 3x the network throughput. Calculating burst requirements is much more difficult – but at least this helps you get started.

SQL Server 2012 AlwaysOn Availability Group supports row and page compression for tables and indexes, we can use the data compression feature to help compress the data inside a database, and to help reduce the size of the database. We can use encryption in SQL Server for connections, data, and stored procedures; we can also perform database level encryption: Transparent data encryption (TDE). If you use transparent data encryption (TDE), the service master key for creating and decrypting other keys must be the same on every server instance that hosts an availability replica for the availability group

The faster your network and your servers are, and the less transactional activity you have, the more up-to-date each replica will be. I’ve seen setups where the replicas are indistinguishable from the primary. However, I’ve also seen cases with underpowered replicas, slow wide area network connections, and heavy log activity (like index maintenance) where the replicas were several minutes behind.

There are two options to configure secondary replica for running read workload. The first option ‘Read-intent-only’ is used to provide a directive to AlwaysOn secondary replica to accept connections that have the property ApplicationIntent=ReadOnly set. The word ‘intent’ is important here as there is no application check made to guarantee that there are no DDL/DML operations in the application connecting with ‘ReadOnly’ but an assumption is made that customer will only connect read workloads.

Common Skills-Based Data Science Interview Questions

Employers are looking for candidates who have a strong knowledge of data science techniques and concepts. Data-related interview questions will vary depending on the position and skills required.

Here are some examples of sample data-related interview questions and answers:

Question: What is the difference between supervised and unsupervised learning?

Answer: The biggest difference between supervised and unsupervised learning involves the use of labeled and unlabeled datasets. Supervised learning uses output and input data that is labeled, and unsupervised learning algorithms don’t.

Another difference is that supervised learning has a feedback mechanism while unsupervised learning does not. Finally, commonly used supervised learning algorithms include logistic regression, support vector machines, and decision trees, while unsupervised learning algorithms are k-means clustering, hierarchical clustering.

Question: What is the difference between deep learning and machine learning?

Answer: This question can be difficult to answer clearly because there is obviously some overlap here. Start by explaining that deep learning is essentially a subfield of machine learning and that both fall under the umbrella of artificial intelligence.

Where machine learning uses algorithms to analyze data and ultimately learn to make decisions based on what it brings out of the data, deep learning layers those algorithms to create artificial neural networks capable of learning and making informed decisions.

FAQ

How do I prepare for a sales advisor interview?

1. Approach it like a sales meeting. If you’re a good sales person, you should be able to sell yourself. …
2. Do your research. …
3. Questions to prepare for. …
4. Take evidence of your achievements. …
5. Take your contact book. …
6. Have a list of questions ready. …
7. Close the deal.

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