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Tech

Top 15 Countries by Coders

I have analyzed the data from HackerRank (December 7 2016) to find out the Top 15 countries in the world by cumulative ranking as well as by the number of Institutions in Top 50. In order to figure out which colleges have the best coders, HackerRank hosted a major University Rankings Competition. Over 5,500 students […]

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Tech

Java: The Most Popular Programming Language Today

Several research independently confirms Java as the most popular programing language today and as such can be considered the safest bet for someone looking to make a career in programming or looking for a career change. Let’s look in details below. The TIOBE Index The TIOBE Index for February 2017 indicates Java is the most […]

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Tech

Key differences between Understanding and Learning (Memorization)

Many Educational Institutes, even today, do not focus on understanding. Their tests can be easily passed with memorization. This weakens the foundation of the students and adversely affects his future performance in professional engagements. Let’s look at the key differences between understanding and memorization and why understanding should be the priority for all students. Memorization […]

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Featured Tech

How to Easily Configure WiFi in Raspberry Pi

Any version of Raspberry Pi can be very easily configured with WiFi access. Coupled with ssh or vnc, it allows you to manage your Pi remotely. Here is the simplest way I could think of, illustrated by a screenshot and detailed below. Once your Raspberry Pi boots up, you will get to this shiny screen. […]

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Featured Microsoft Tech

Steps to secure and protect your Skype account from Hacking

Skype accounts are being hacked since at least August last year. Breached Skype accounts are used to send thousands of spam messages before they’re locked by Microsoft. The owners then have to regain access and that is when most find out about it. Skype has fallen victim to similar attacks before, and hackers were able […]

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Tech

Maximum number of Files in a Directory

Different file systems in different Operating Systems has different limitations in the number of files that can be in a directory as determined by the underlying architecture.. Here is an overview of maximum of number of files that you can have in a directory and associated problems, if any, like performance. FAT32 Maximum number of […]

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Featured Tech

Possible causes & solutions for MongoDB not running

Is your MongoDB properly running? A simple way to check it would be with: service mongod status On my CentOS 5.x it gave: mongod dead but subsys locked There are two possible causes I could find. First is related to disk space. If you do not have enough space for dbpath (database directory) then you […]

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Tech

Ubuntu: How to Change Host name and Propagate to DHCP Server

How to change Hostname on Ubuntu First find your current host name by typing: hostname Open /etc/hostname and change the host name specified there to the new host name. sudo vi /etc/hostname Now open /etc/hosts and locate the old host name in the file and change it to the new host name. sudo vi /etc/hosts […]

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Tech

Suggestions for Raspberry Pi Demo & Tutorial for Engineering Students

Next week I am giving a demo of Raspberry Pi and a Tutorial to Engineering students, primarily from Electronics & Computer Science department. I am collecting suggestions on what to show them in this seminar. Currently I have thought about the following items How to use Raspberry Pi to create a mini FM Radio Station […]

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Tech Tutorials

Safest way to Update and Upgrade Raspbian Wheezy (Raspberry Pi OS)

There are plethora of instructions on the web to update and upgrade Raspbian and they work too, under normal conditions. However as Raspberry Pi is increasingly being used for Mission Critical tasks, it is important to adopt a procedure which won’t leave you with broken packages or worst, a un-bootable Operating System with your data […]