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WHAT SHOULD BE DONE AFTER GATE AND BEFORE JOINING COLLEGE FOR MTECH?? SHALL I DO SOME ONLINE PROGRAMMING COURSES?? WHICH SKILLS SHOULD I FOCUS ON MORE??

PLEASE ADVICE

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• System Calls, Processes, Threads, Inter‐process communication, Concurrency and synchronization.
• Deadlock.
• CPU scheduling.
• Memory management and Virtual memory.
• File systems. Disks is also under this.

“System Calls is newly added. CPU scheduling renamed to CPU and I/O scheduling”

Topic Covered in Videos	Video link from GO Youtube channel
System Calls Virtual Memory Process Process scheduling Process lifetime Concurrent Programming Secondary storage	GO Videos

xv6 is a great Unix like OS for learning OS concepts. You can get a copy of full source code from this Git Repo: https://github.com/mit-pdos/xv6-public .

 

You can compile it and run it using an emulator like qemu.

( https://www.youtube.com/watch?v=ikcfQw4FPEw ).

Here is the relevant playlist :

( https://www.youtube.com/watch?v=DZ0-GMtOtEc&list=PL14-cztsT7zpTikkkROTPka86zLdx7AJh ).

 

( one more lecure on v6 intro : https://www.youtube.com/watch?v=2rAnCmXaOwo )

 

To give you a perspective of this exercise, let's think of these QS: 1. How the OS gets control of CPU in context switch ( with detailed steps ).

( https://www.youtube.com/watch?v=YPIw67LuuY4 )

2. What is a virtual memory and how kernel code manages this virtual memory, what are the data structure to maintain this "virtual memory"?

( https://www.youtube.com/watch?v=TPR8QAL_T4o )

3. How fork() executed inside the kernel and how a child gets PID value zero. What is the first thing child do when OS scheduler schedules it?

4. How are PCBs stored? 5. What are kernel stack and its use in context switch?

6. Detailed steps of scheduler polling each process to select a user process and switch to userspace. etc.

7. How are system calls added?

( https://www.youtube.com/watch?v=21SVYiKhcwM )

 

This book on xv6 explains the implementation of it.

https://pdos.csail.mit.edu/6.828/2016/xv6/book-rev9.pdf

 

You can also follow this course to learn more and work on exciting small assignments and projects: https://pdos.csail.mit.edu/6.828/2016/schedule.html

 

If really want to work move forward from this: You can start with Linux source code :

Here are two into tutorials :

1. https://medium.freecodecamp.org/building-and-installing-the-latest-linux-kernel-from-source-6d8df5345980

2. https://medium.com/@ssreehari/implementing-a-system-call-in-linux-kernel-4-7-1-6f98250a8c38

 

Thanks !

The Defence Research and Development Organisation is the premier agency under the Department of Defence Research and Development in Ministry of Defence of the Government of India, charged with the military's research and development, headquartered in Delhi, India. 

Question Paper	Answer Key	Discussions	Take Exam
2022-1	Official Key	GO	GO
2022-2	Official Key	GO	GO

 

computer science

23/sep/2021  BARC OCES/DGFS 2021   SET 4

 

mostly question are previous year of gate.  i recall some of them some of them

if packet transfer from node 1 to node b then which of the following will be change  (ttl  checksum fragment offset).

3-4 question from  boolean simplified form

1 question from mux

1 question of 4 D flip flop  which have an nand gate between 2 LSB flip flop and ask after how much time i can regenerate clock.

10-12 question of c programming

mostly theoretical question of each subject,but easy

5-6 question based on direct mapping associative mapping, find tag, no of line  (tag set block)

3-4 basic of DBMS relational algebra to language

1 question from predicate logic   may be    (all student are------ and -----) i cant remember but easy

paper was easy to  moderate not much hard.

I have a 23 years compilation of previous years topic wise questions. I know solving both will be really good, but I don't think I have the time for that. Is GO book enough? Or is it too much that I should go for previous years book?

Reference: Hamacher

Hello folks, I've tried to download this pdf file from here and here  5 times but the download keeps on failing.

Please fix this issue!

Thanks!

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• Boolean algebra.
• Combinational and sequential circuits. Minimization.
• Number representations and computer arithmetic (fixed and floating point)

Topic Covered in Videos

Video link from GO Youtube channel

Introduction to Digital Circuits Combinational Logic Basics Combinational Circuits Logic Simplification Karnaugh Maps And Implicants Logic Minimization Using Karnaugh Maps Karnaugh Maps Minimization Using Maxterms Code Converters Parity Generator And Display Decoder Arithmetic Circuits Carry Look Ahead Adders Subtractors $2's$ Complement Subtractor And BCD Adder Array Multiplier Introduction to Sequential Circuits S-R, J-K and D Flip Flops J-K and T Flip Flops Triggering Mechanisms of Flip Flops and Counters Up/Down Counters Shift Registers Application of Shift Registers State Machines Design of Synchronous Sequential Circuits Design Using J-K Flip Flop Mealy And Moore Circuits Pattern Detector

GO Videos

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Syllabus: 

• Limits, Continuity, and Differentiability.
• Maxima and minima, Mean value theorem.
• Integration.

Topic Covered in Videos	Video link from GO Youtube channel
	GO Videos

https://classroom.gateoverflow.in/mod/page/view.php?id=113

Tips:

Use containers (LXC or Docker ) for creating multiple client systems.

Use Google Protocol Buffer or some other serialization-deserialization library for message transfer over the socket. 

You can avoid byte oriented message transfer of TCP, by using SCTP instead.

 

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Syllabus: 

• Random variables.
• Uniform, Normal, Exponential, Poisson and Binomial distributions.
• Mean, median, mode and standard deviation.
• Conditional probability and Bayes theorem

Topic Covered in Videos

Video link from GO Youtube channel

Probability and Counting Story Proofs, Axioms of Probability Birthday Problem, Properties of Probability  Conditional Probability  Law of Total Probability  Monty Hall, Simpson's Paradox Gambler's Ruin and Random Variables Random Variables and Their Distributions  Expectation, Indicator Random Variables, Linearity The Poisson distribution  Discrete vs. Continuous, the Uniform  Normal distribution Location, Scale, and LOTUS Exponential Distribution

GO Videos

Computer Networking: A Top-Down Approach

Topic-wise video Lectures (with slide format notes) by  J.F. Kurose [Author]

ttps://gaia.cs.umass.edu/kurose_ross/online_lectures.htm 

 

Book → https://1lib.in/book/3422999/195b8a

Solution (book) → https://1lib.in/book/6040932/94b2fa

Data Communications and Network

Book → https://1lib.in/book/2196530/3bfbaf

Solution (book) → https://1lib.in/book/1201808/d09f03?dsource=recommend

Hi guys, just wantedbto share something with you. Most of us find maths as a 'just on paper' thing and so, somewhat boring (no offense). That's almost true, provided you have never approached it in a practical way. But, here's something I found today while surfing. It turns out to be a damn good website for boosting up the interest in Mathematics. Main focus of the organization is on discrete but still they will roam you through the interesting history and future applications. Thought it will be a good suggestion for gate aspirants.

Here's the site: www.mathigon.org

For graph theory, chekout http://world.mathigon.org/Graph_Theory

Hope, it cheers you a bit.

(P.S. - I am not anyone's promotion agent. I just found the content useful, that's why took my time out to write this :) )

HELLO FRNDS CAN ANY ONE PLZ PROVIDE ME AAI JUNIOR EXECUTIVE IT 2018 29 NOVEMBER

QUESTION PAPER LINK OR PDF

IT HELPS ME

THNKS

Hello Everyone !!!

I am sharing a document titled "SECURITY OF CYBER SYSTEMS".

https://docs.google.com/presentation/d/1apDOaHSVJaorwndrV35Sdz5JcjQcyLthYCdZ_9FR1VA/edit?fbclid=IwAR3l9oUnv47Nn59N9Gy4hcYMBj9YNrUMcRTnIOW1wScXJWBr76xkIdJhdKg

This document is relevant for all aspirants appearing for DRDO Scientist-B 2020 examination as well as for cyber security enthusiasts.

Initially, I have compiled a list of popular attacks. Based on your feedback I will extend it for rest part of DRDO syllabus.

Feel free to report errors !!!

 

 

People who love to read different blogs and always searching for may be a little extra information that can be added to her/his knowledge from every new blog she/he reads OR may be always like to adopt a new simple way of thinking OF Data Structures and Algorithms as they are passionate about these subjects, may find it useful !!

All you need to do is to create some account if you don't have one.. SHARING THE LINKS DOWN BELOW : 

https://dev.to/t/basecs 

https://medium.com/basecs 

https://medium.com/basecs/stacks-and-overflows-dbcf7854dc67 

https://www.codenewbie.org/basecs 

May be you know all the concepts discussed here but as refreshing your knowledge you can find it as a useful tool...

If you do not like or may be you have visited those links already, please ignore :-)

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• Machine instructions and Addressing modes.
• ALU, data‐path and control unit.
• Instruction pipelining. Pipeline Hazards
• Memory hierarchy: cache, main memory and secondary storage;
• I/O interface (Interrupt and DMA mode)

        “Pipeline hazards newly added — but it was already there implied by pipelining.”

Topic Covered in Videos	Video link from GO Youtube channel
Programs and Data Data Representation Registers and Memory Instructions, Addressing Modes A RISC Instruction Set Function Call and Return Instruction Execution Software organization Pipelining Pipeline hazards Cache memory Memory hierarchy Cache operation Cache aware programming Data Dependencies in Pipeline	GO Videos

Can anyone upload a DRDO previous year papers/ link.

I don’t remember completely but someone had pasted the link on a blog here a year ago.

Thanks in advance. Gateoverflow is one the most wonderful site I had ever used in my entire Journey to AIR 89.

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