Overconfidence, Underconfidence and Reality Checks

Published: 24 Nov 2014 | Last updated 7 May 2021

Human psychology is strange, it is one of  the  real reasons behind success and failure. A same action by different individuals can result into multiple psychological reactions. Two students with similar level of intelligence, solving the same number of question or covering the same amount of academic portions can have different level of confidence about their preparations.

Sometimes situations are even stranger, a student with inadequate preparation may have tons of baseless confidence pumped up in his head and a student with sufficient level of preparation may be nervous.

Overconfidence leads to carelessness and underconfidence/nervousness may lead to depression or wrong decisions, both ultimately leading to degraded preparation or performance.

At this point, a reality check is the need of the moment. Mock tests or test series are very useful in deflating the excessively pumped morale and at the same time inflating the under-pumped ones.

Timing of such reality checks is also one of the Critical Success Factor(CSF). A regular and modularized TEST SERIES weeds out early misconceptions which can turn out to be too costly at a later stage if left unrectified.

So be it GATE-2018 or your life in general, keep your confidence level optimized by having timely reality checks.

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The Ammunition: Which Books?

Published: 15 Sep 2014 | Last updated 7 May 2021

This page mentions the literature that Surendra and I used to get AIR-5 and AIR-1 respectively. Here we address the persisting problem in most people’s minds; which books should I follow? We don’t recommend ANY material or pre-made notes to be used. We provide the list of books to be used and the list of papers to be practiced.

Discrete Math: Kenneth Rosen

Graph Theory: Diestel (first chapter)

Linear Algebra: Gilbert Strand (also watch video lectures!)

Numerical Methods and Calculus: Google the formulas up, list them down and stick them up on your wall and look at them daily.

Operating systems: Silberschatz and Galvin (I followed the Windows XP edition).

Digital Logic: Morris Mano (and a lot of thought).

Computer Organization: JP Hayes for IEEE 754, Morris Mano for the insights and Stallings and Hamachar-Zaky for everything else. Should be a bit careful with the pipelining questions as they can get tricky and longish.

Data Structures: I followed Goodrich-Tamassia and Sahni, though not totally. Basically any book will do, given some insights and a bit of coding experience.

Algorithms: Cormen by a long shot!

Theory of Computation: Ullman is a decent book. And so is Cohen. Wikipedia is an excellent resource for getting intuitions right. Also, Dexter Kozen has a wonderful compilation of his lecture notes on it. Also, to think of it, please refer to our IISc Automata Theory and Computability course slides:

Compiler Design: Dragon Book!

Databases: Korth and Sudarshan is a decent book. I referred wikipedia a lot for this, though (as I had little passion for DB).

Computer Networks: Tanenbaum (I didn’t like this). The book by Kurose and Ross (Computer Networks – A Top-Down Approach) is awesome! Solve problems from Peterson and Davie.

For practice use the GK publications or some other thing. And never make the mistake of grading yourself based on their key. Solve all the previous GATE papers to give you confidence and strategies. Disclaimer: We haven’t read these books from end to end. We just referred to them as need came. The primary pointer to what you should be reading should be the sort of mistakes you make at the moment. Even Wikipedia helps a lot in cases.

  • Hari Krishna Malladi
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Making a video tutorial

Published: 20 May 2014 | Last updated 7 May 2021
In last few decades technology has grown super fast. Its not so long I used the last postcard but still I can not find it anywhere in my store room. All the means of communication has shifted to digital platform unexpectedly. But the same shift can not be observed in educational system. E-learning has taken a bite but still the major chunk is still owned by traditional class room teaching system.
Here on Techtud we are trying to create videos which are as expressive as classroom and suit the Indian education need. This article will guide you to create a nice video tutorial with limited resources.
Hardware Requirements
A windows machine 
A mic (integrated mic may also work)
A table-cam
A webcam (optional)
PowerDirector (optional)
    1. Configure the table-cam for best optimization. You can also try Mirror and Flip to adjust your requirement.
    2. Install Xsplit. Try to find the old version which doesn't have watermark.
    3. Install PowerDirector. is also a nice substitute for it but then you need to upload video on youtube and edit.
    4. Configuring Xsplit.


    1. Edit recorded video with PowerDirector.
    2. To save the video go to 'Produce' tab > 'Device' tab > Select apple > Profile Type > iPad > choose quality.
      2/3 Mbps will be good enough for our purpose.
So, you need not to prepare a topic for one take recording. You can revise the things or refer the points in between. It will really make the video recording a cup of coffee for you. 
Following is the video that I recorded:
And following is the same video after a small edit:



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