Sunil Kumar Profile picture
11 Oct, 16 tweets, 4 min read
Free stock photos for your websites, blogs and applications:

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3. Pixabay
4. Magdeleine
5. Picspree
7. Gratisography
8. Negative Space
9. Stock Snap
10. Kaboom Pics
11. New Old Stock
12. Pic Jumbo
13. Stockvault
14. Placeholder
15. Realistic Shots

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More from @sunilc_

12 Oct
15 Websites that offer free HTML & CSS website templates:

1. HTML5Up
2. TemplateMO
Read 16 tweets
12 Oct
Interview Tip:

Why are NoSQL databases more scalable than SQL databases?

SQL databases follow ACID properties. But NoSQL database do not. To follow ACID principles lot of bookkeeping happens behind the scenes.

NoSQL DBs relax principles like durability and consistency too.

- Dropping Atomicity lets you shorten the duration for which tables (sets of data) are locked. Example: MongoDB, CouchDB.

- Dropping Consistency lets you scale up writes across cluster nodes. Examples: riak, cassandra.

Dropping Durability lets you respond to write commands without flushing to disk. Examples: memcache, redis.

NoSQL DBs give up the A, C and/or D requirements, and in return they improve scalability.

Read 5 tweets
11 Oct
How would you go about partitioning and sharding when you have huge volume of data in your applications?

Let's discuss the approach you should take in this thread:

The approach we will discuss here is assuming we have a relational database.

SQL vs NoSQL is entirely a new discussion altogether. That's not in the scope of this thread.

Before discussing here are some terms you should be familiar with:

Partitioning: is a process of dividing a table by rows into multiple smaller children tables within an instance.

Sharding: is a process of dividing a table by rows across multiple instances.

Read more on these topics if these definitions do not make sense to you.

Read 13 tweets
10 Oct
Are you a front-end developer / designer ?

You will be interested in these 20 websites that will help you with color codes & palettes:

1. HTML Color Codes
2. Gradient Hunt
Read 21 tweets
9 Oct
We keep hearing about the CAP Theorem, know what it means, but don't really know what it actually means in a real world distributed system.

Let's discuss about CAP Theorem in detail in this thread:


CAP Theorem is one of the important system design concepts. It states that any distributed system can guarantee only 2 of the 3 following properties:

- Consistency
- Availability
- Partition Tolerance

Let's discuss different scenarios possible in a real world.

For the discussion we will take this distributed system as an example which has two components C1 & C2.

They are connected to each other and are always in sync with respect to the data they store.

Read 13 tweets
6 Oct
Everyone wants to make money through freelancing but struggle to get started. Choose the right platform based on your skills.

Here's a thread on the list of top 20 freelancing platforms for designers and developers:

1. Upwork
2. Freelancer
Read 21 tweets

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