**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...

# If you are interested to learn at IIT then , only one option is apply all IIT's for MS ( core subject as well as interdisciplinary Branches) , prepare for virtual interview, (not for Ph.D)....

## 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

Here are the notes I have written during my preparation for GATE CS/IT. Future aspirants may find it helpful. These are elaborated notes, that one may go through to recapitulate stuff fast. I took help from standard books and online courses to put together these notes. As of now, only some chapters of Discrete Mathematics are uploaded. I will upload notes for all the subjects within a month.

https://gatecsebyjs.github.io/

Sample note(on Combinatorics):

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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### Click to read My preparation experience.

GATE syllabus wallpaper for mobile.Books I read :

**Download NIELIT PDFs**

**NIELIT Technical PDF 2020 Draft**

**NIELIT Aptitude PDF 2020 Draft**

$$\textbf{Scientist – ‘B’}$$

$\textbf{ELIGIBILITY:}$ B.E/ B.Tech/ DOEACC B-level OR AMIE/ GIETE OR MSc OR MCA OR ME/ M.Tech OR M.Phil Electronics, Electronics and Communication, Computer Sciences, Communication, Computer and Networking...

## $$\color{Blue}{\textbf{Calculus}}$$

### $$\color{Magenta}{\textbf{1.Trigonometry}}$$

$\textbf{Pythagorean Identities:}$

$\sin^{2}\theta + \cos^{2}\theta = 1$ $1+\tan^{2}\theta = \sec^{2}\theta$ $1+\cot^{2}\theta = \csc^{2}\theta$$\textbf{Reciprocal Identities:}$

$\sin\theta = \dfrac{1}{\csc\theta}$ $\cos\theta = \dfrac{1}{\sec\theta}$ $\tan\theta = \dfrac{1}{\cot\theta}$ $\csc\theta = \dfrac{1}{\sin\theta}$ $\sec\theta = \dfrac{1}{\cos\theta}$ $\cot\theta = \dfrac{1}{\tan\theta}$$\textbf{Tangent and Cotangent Identities:}$

$\tan\theta = \dfrac{\sin\theta}{\cos\theta}$ $\cot\theta =...### $$\color{Blue} {\textbf{Linear Algebra}}$$

$\textbf{1.Properties of determinants:-}$

The determinant is only valid for the square matrix.

$\mid A^{T}\mid = \mid A \mid $ $\mid AB \mid = \mid A \mid \mid B \mid $ $\mid A^{n} \mid = \big(\mid A \mid\big)^{n}$ $\mid kA\mid = k^{n} \mid A \mid$, here $A$ is the $n\times n$ matrix. If two rows (or two columns) of a determinant are interchanged, the sign of the value of the determinant changes. If in determinant any row or column is completely zero, the value of the determinant is zero. If two rows (or two columns) of a determinant are identical, the value of the determinant is...$$\textbf{1.Theory Of Computation}$$

Book Title Author Chapters relevant for GATE Chapters on GO Questions On GO 1.Introduction to the Theory Of ComputationMichael Sipser(3rd Edition)

$0,1,2,3,4,5$ $0,1,2,3,4,5$ Questions from Sipser 2.Introduction To Automata Theory, Languages, and ComputationJeffrey D. Ullman(3rd Edition)

$1,2,3,4,5,6,7,8,9$ $1,2,3,4,5,6,7,8,9$$$\textbf{Contents}$$

**Syllabus:**

$$\textbf{Contents}$$

**Syllabus:**

**Topic Covered in...**

$$\textbf{Contents}$$

**Syllabus:** Connectivity, Matching, Coloring.

$$\small{\overset{{\large{\textbf{Mark Distribution in Previous...

$$\textbf{Contents}$$

**Syllabus:** Combinatorics: Counting, Recurrence relations, Generating functions.

$$\small{\overset{{\large{\textbf{Mark Distribution in Previous...

$$\textbf{Contents}$$

**Syllabus:**

**Topic Covered in Videos**

**Video link from GO Youtube channel**Introduction to Proofs Propositional Logic Proof Techniques GO Videos