MAANG_PREPRATION

JAVA COMPLETE CHEAT SHEETS AND GUIDE

Required setup and tools

• IntelliJ IDEA
• VS code
• Eclipse
• Core Java
• Geeks for Geeks
• LeetCode
• GitHub
• JAVA 8

Here CheatSheets are available just check it.

Front End	Back End	DataBase
HTML	JAVA	SQL COMMANDS
HTML 4	PHP	ORACLE SQL
HTML 5	PYTHON	ORACLE COMMANDS
CSS	RUBY	MY SQL
CSS2	RUBY 1.8	POSTGRE SQL
CSS3	.NET	MONGODB
JAVA SCRIPT	C	-----NA-----
JQUERY	C++	-----NA-----
BOOTSTRAP	EXPRESS.JS	-----NA-----
BOOTSTRAP 3	NODE JS	-----NA-----
BOOTSTRAP 4	---NA---	-----NA-----
FONT FAMILIES	---NA---	-----NA-----

Shortcuts for Eclipse and IntelliJ IDEA

Eclipse	IntelliJ IDEA	Description
F4	ctrl+h	show the type hierarchy
ctrl+alt+g	ctrl+alt+F7	find usages
ctrl+shift+u	ctrl+f7	finds the usages in the same file
alt+shift+r	shift+F6	rename
ctrl+shift+r	ctrl+shift+N	find file / open resource
ctrl+shift+x, j	ctrl+shift+F10	run (java program)
ctrl+shift+o	ctrl+alt+o	organize imports
ctrl+o	ctrl+F12	show current file structure / outline
ctrl+shift+m	ctrl+alt+V	create local variable refactoring
syso ctrl+space	sout ctrj+j	System.out.println(“”)
alt + up/down	ctrl + shift + up/down	move lines
ctrl + d	ctrl + y	delete current line
???	alt + h	show subversion history
ctrl + h	ctrl + shift + f	search (find in path)
“semi” set in window-> preferences	ctrl + shift + enter	if I want to add the semi-colon at the end of a statement
ctrl + 1 or ctrl + shift + l	ctrl + alt + v	introduce local variable
alt + shift + s	alt + insert	generate getters / setters
ctrl + shift + f	ctrl + alt + l	format code
ctrl + y	ctrl + shift + z	redo
ctrl + shift + c	ctrl + /	comment out lines (my own IDEA shortcut definition for comment/uncomment on german keyboard layout on laptop: ctrl + shift + y)
ctrl + alt + h	ctrl + alt + h (same!)	show call hierarchy
none ?	ctrl + alt + f7	to jump to one of the callers of a method
ctrl + shift + i	alt + f8	evaluate expression (in debugger)
F3	ctrl + b	go to declaration (e.g. go to method)
ctrl + l	ctrl + g	go to line

🏆 Syllabus for SDE-1 Role 📋

TOOL's and Tech	RECOMMENDED
Select OOP lang	JAVA
DSA	LeetCode
System Design	LLD/HLD
FramWorks	Spring
RDBMS	MySql/MongoDB
Scripting lang	BASH/JavaScript
OS	Windows/Linux/Mac
Networking	Better to know CCNA
Cloud	AWS/Azure/GCP
Technologies	DevOps tools

Online resources to learn

YouTube Channel Name	Content
CodeKarle	System Design
SudoCode	System Design
Gaurav Sen	System Design
Concept && Coding	System Design
NetworKing	NetWorking
NetworkChuck	linux
LinuxHint	linux
DavidBombal	Networking/Hacking
TechWorld with Nana	DevOps tools
IT k Funde	NetWorking

Plan

Every day 3 DSA problems	One System design	Revision every 20 days
3*20=60 DSA Questions per month	20 Design Questions per month	take 10 days to revision all DSA/SD

🏆 Table of Contents 📋

Okay Easy to Handle	Need to Understand	I Don't know learn more
💚	😡	💔
GFG	Geeks For Geeks	For basics
LC	LeetCode	DSA preparation
HacR	HackerRank	Exploring

💝 Total: 0051 💝

Easy	Medium	Hard
047	004	000

status of problems

Easy to handle	Hard to handle	I don't have idea need to learn concepts
025	021	003

Daily Learning Tracker

Date	Question	Platform	Solution	Difficulty	Reaction	Description
08/04/2023 -Day 001	-	-	-	-	💚	Ntg solved today just setup the env
09/04/2023 -Day 002	Array 2nd large	01 GFG	Solution	School	💚	with out sort the array need to solve this problem little hard!
10/04/2023 -Day 003	Sum of Series	02 GFG	Solution	School	💚	Need to know about MATH formula to solve lets understand math
10/04/2023 -Day 003	Value equal to index value	03 GFG	Solution	School	💚	Understand concept and dry it...
10/04/2023 -Day 003	Sum of Array Elements	04 GFG	Solution	School	💚	sum of array elements -easy problem
10/04/2023 -Day 003	Print alternate elements	05 GFG	Solution	School	💚	very easy problem no need, for loop trick
11/04/2023 -Day 004	Palindromic Array	06 GFG	Solution	School	😡	make sure about All String classes
11/04/2023 -Day 004	Arrays Sum of array	07 GFG	Solution	School	💚	good Question easy to handle
11/04/2023 -Day 004	Count of smaller elements	08 GFG	Solution	School	😡	little confused in operators <+,<-,<+... okay
11/04/2023 -Day 004	Sum of Array	09 GFG	Solution	School	💚	sum of array super easy
11/04/2023 -Day 004	Print array elements	10 GFG	Solution	School	💚	using for each loop super easy
11/04/2023 -Day 004	Swap kth elements	11 GFG	Solution	School	😡	little confused but easy problem
12/04/2023 -Day 005	Display longest name	12 GFG	Solution	School	💚	super easy problem, required string class functions
12/04/2023 -Day 005	Find Index	14 GFG	Solution	School	😡	little confused this problem
12/04/2023 -Day 005	Perfect Arrays	15 GFG	Solution	School	💚	super easy use build in Arrays.equals method
13/04/2023 -Day 006	At least two greater elements	16 GFG	Solution	School	😡	confused question not understood solution is super easy
13/04/2023 -Day 006	Smaller and Larger	17 GFG	Solution	School	💚	lilttle easy prolbem
13/04/2023 -Day 006	Java Arrays Set 1	18 GFG	Solution	School	💚	string formate using
14/04/2023 -Day 007	Print the left element	19 GFG	Solution	School	💚	very simple time complexity is matter
14/04/2023 -Day 007	Fascinating Number	20 GFG	Solution	School	💔	little hard to me need to understand it
14/04/2023 -Day 007	Average in a stream	21 GFG	Solution	School	😡	one more time need to do this problem
15/04/2023 -Day 008	Compete the skills	22 GFG	Solution	School	💚	Arrays School level problems completed
16/04/2023 -Day 009	Binary Search	23 GFG	Solution	Basic	💚	easy problem try to solve recursive
16/04/2023 -Day 009	Check if two arrays are equal or not	24 GFG	Solution	Basic	💚	super easy
16/04/2023 -Day 009	Reverse array in groups	25 GFG	Solution	Basic	💔	very hard i dont know
17/04/2023 -Day 010	Search an Element in an array	26 GFG	Solution	Basic	💚	easy problem
18/04/2023 -Day 011	Cyclically rotate an array by one	27 GFG	Solution	Basic	💚	easy problem
18/04/2023 -Day 011	Find min & Max ele	28 GFG	Solution	Basic	💚	easy problem
18/04/2023 -Day 011	Fist and last occur	29 GFG	Solution	Basic	💚	easy problem
19/04/2023 -Day 012	Max sum arr i * i	30 GFG	Solution	Basic	😡	very hard
19/04/2023 -Day 012	1st ele to ccour k Times	31 GFG	Solution	Basic	💔	HASHMAP HARD
20/04/2023 -Day 013	-	-	Revision	-	-	busy with GirlFriend
21/04/2023 -Day 014	array into Zig-Zag fashion	32 GFG	Solution	Basic	😡	Array to convert zigzag like < > < > < >
21/04/2023 -Day 014	Subarray with given sum	33 GFG	Solution	Easy	😡	little hard due to i dont have ArrayList DS
22/04/2023 -Day 015	Missing number in array	34 GFG	Solution	Easy	😡	Question not understand
23/04/2023 -Day 016	Sort an array of 0s, 1s and 2s	35 GFG	Solution	Easy	😡	Not Easy little confusion make sure all easy problems pratice more and more
23/04/2023 -Day 016	Leaders in an array	37 GFG	Solution	Easy	😡	little hard due to lack of DS knowledge theory is imp focus into theory part
24/04/2023 -Day 017	Equilibrium Point	38 GFG	Solution	Easy	😡	i dont know how to solve it
25/04/2023 -Day 018	Stock buy and sell	39 GFG	Solution	Easy	😡	little easy problem but need to understand
26/04/2023 -Day 019	Largest subarray with 0 sum	40 GFG	Solution	Easy	😡	using HASHTABLE DS
27/04/2023 -Day 020	Array Subset of another array	41 GFG	Solution	Easy	💚	very easy from Arrays try to solve Arrays problmes in Arrays only
28/04/2023 -Day 021	Wave Array	42 GFG	Solution	Easy	💚	super easy but need to understand question properly
29/04/2023 -Day 022	Build In Functions/Methods	43 GFG	BuildInFun	Methods	-	Revision Started, Learning built-in methods in(Arrays,Strings,System,Math classes)
30/04/2023 -Day 023	Longest Common Prefix in an Array	44 GFG	Solution	Easy	😡	String Arrays
01/05/2023 -Day 024	Find all pairs with a given sum	45 GFG	Solution	Easy	😡	HashMap/set data Structers used
02/05/2023 -Day 025	Bitonic Point	46 GFG	Solution	Easy	💚	very easy problem arrays
02/05/2023 -Day 025	Minimize the sum of product	47 GFG	Solution	Easy	💚	Little easy from Arrays
03/05/2023 -Day 026	Kadane's Algorithm	48 GFG	Solution	Medium	💚	little easy
04/05/2023 -Day 027	Minimum number of jumps	49 GFG	Solution	Medium	😡	hard to handle
05/05/2023 -Day 028	Kth smallest element	50 GFG	Solution	Medium	💚	very easy
06/05/2023 -Day 029	Minimize the Heights II	51 GFG	Solution	Medium	😡	little harder
07/05/2023 -Day 030	-	52 javaDoc	BuildInFun	Medium	-	-
08/05/2023 -Day 031	Check for Binary	53 GFG	String-Sol	School	💚	Easy problem CharAt() method using
09/05/2023 -Day 032	LinkedList	54 L2B2	-	-	-	singular LinkedList completed
10/05/2023 -Day 032	Remove Spaces	55 GFG	String-Sol	School		String.replace(" ","");
11/05/2023 -Day 032		56 GFG	-	-	-
		57 GFG		Medium
		58 GFG
		59 GFG
		60 GFG
		61 GFG
		62 GFG
		63 GFG
		64 GFG
		65 GFG
		66 GFG
		67 GFG	Revision
		68 GFG
		69 GFG
		70 GFG
		71 GFG
		72 GFG
		73 GFG
		74 GFG
		75 GFG
		76 GFG
		77 GFG
		78 GFG
		79 GFG
		80 GFG
		81 GFG
		81 GFG
		82 GFG
		83 GFG
		84 GFG
		85 GFG
		86 GFG
		87 GFG
		88 GFG
		89 GFG
		90 GFG
		91 GFG
		92 GFG
		93 GFG
		94 GFG
		95 GFG
		96 GFG
		97 GFG
		98 GFG
		99 GFG
		100 GFG
		101 GFG
		102 GFG
		103 GFG
		104 GFG
		105 GFG