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Interview questions: verify the braces

This is one of the easier coding tasks, but you still can meet it in some preliminary tech screening. The problem looks like this: Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. The brackets must close in the correct order, "()" and "()[]{}" are all valid but "(]" ...

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Going off-heap to improve latency and reduce AWS bill

java-interview-questions-answers

Most performance issues can be solved in several different ways. Many of the solutions applicable are well-understood and familiar to most of you. Some solutions, like taking certain data structures off from the JVM-managed heap, are more complex. So if you are not familiar with the concept, I can recommend to proceed to learn how we recently reduced both the ...

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Run Scala implemented Hadoop Jobs on HDInsight

Previously we set up a Scala application in order to execute a simple word count on hadoop. What comes next is uploading our application to HDInsight. So we shall proceed in creating a Hadoop cluster on HDInsight.               Then we will create the hadoop cluster. As you can see we specify the admin console ...

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WordCount on Hadoop with Scala

Hadoop is a great technology built with java. Today we will use Scala to implement a simple map reduce job and then run it using HDInsight. We shall add the assembly plugin on our assembly.sbt addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3") Then we will add the Hadoop core dependency on our build.sbt file. Also will we apply some configuration in the ...

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FREE IntelliJ IDEA Licenses Giveaway from Java Code Geeks and JetBrains (total value of $447)!

Looking for a powerful, yet simple, Java IDE ? Then we have something especially for you! We are running a contest giving away 3 FREE licenses for the amazing IntelliJ IDEA IDE. Every aspect of IntelliJ IDEA is specifically designed to maximize developer productivity. Together, powerful static code analysis and ergonomic design make development not only productive but also an ...

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[MEGA DEAL] Linux/UNIX Certification Training Bundle (97% off)

Learn the Tricks of the Linux Systems Administration Trade & Prepare for Top Certification Exams Hey fellow geeks, This week, on our JCG Deals store, we have an extreme offer. We are offering the Linux/UNIX Certification Training Bundle for only $49 instead of the original price of $2,195, yeap that is a massive 97% off. Linux and UNIX operating systems ...

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Docker Challenges and Misconceptions

Previously, we discussed the main reasons why Docker can be useful to the enterprise. So why aren’t all large companies using Docker already? A large part of the reason are the misconceptions surrounding Docker. We’ll touch on four of them in this post before we wrap up with some suggestions about how to move forward with Docker at the enterprise ...

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