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TUESDAY, OCTOBER 19, 2021


TOP 10 COURSES TO LEARN JAVASCRIPT IN 2021 - BEST OF LOT


There is no doubt that JavaScript is the most popular programming language at
this moment, and it's also confirmed by StackOverFlow's Survey. You can build
static websites, web applications, native mobile applications (yes, you can do
that too), desktop applications, and even server-side applications in
JavaScript. It also makes you a hundred times more employer as there are tons of
web development jobs out there. Because of that, more and more developers are
learning JavaScript to become web developers.




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Labels: courses , JavaScript , online resources



TOP 5 FREE CYBER SECURITY COURSES FOR BEGINNERS TO LEARN IN 2021 - BEST OF LOT


Hello guys, if you want to learn Cyber Security and start your career as a
SEcurity expert or just want to improve your knowledge about Cyber Security,
Information Security, Web Servuciry, and Computer Security then you have come to
the right place. Earlier, I have shared the best Cyber Security Courses and best
Web Security courses and in this article, I am going to share free online
courses to learn Cyber Security, This is in line with your demand as many people
asked me to share free courses for Cyber Security when I shared the best-paid
courses. So, here we go, In this article, I have compiled free Cyber Security
courses from Udemy, Coursera, and edX and they are absolutely free to learn and
join. 



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Labels: courses , Cyber Security , free resources , security



3 WAYS TO PREVENT METHOD OVERRIDING IN JAVA - PRIVATE, STATIC AND FINAL METHOD
EXAMPLE TUTORIAL


Every Java programmer knows that final modifier can be used to prevent method
overriding in Java because there is no way someone can override final methods;
but, apart from final modifier, is there any other way to prevent method
overriding in Java? This was the exact question, asked to one of my friend in a
recent Java interview at one of the leading Investment bank. I guess, he was
lucky to get this question because he already knows those tricks and was able to
answer it quickly. When he told me about his experience,  I didn't understand
why someone ask this question? What is the purpose? What they were trying to
find out? I can understand if they have asked what's the best way to prevent
method overriding in Java, or what is the risk of overriding? 



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Labels: core java interview question



WHY JAVA PROGRAMMERS SHOULD LEARN DOCKER AND KUBERNETES IN 2021


Hello Java Programmers, if you are looking to learn some in-demand software
tools to improve your profile then you have come to the right place. Earlier, I
have shared the best tools for Java developers and today, I am extending it to
all developers.  Along with Docker, if there is another tool or technology which
has caught software developers' attention in recent times then it must be
Kubernetes. Actually, it's often mentioned alongside Docker becuase it takes
what Docker offers to the next level. If you don't know what is Docker and
Kubernetes let me give you a brief overview before going deep into why every
programmer should learn Kubernetes.



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Labels: best of javarevisited , Docker , Kubernetes



10 EXAMPLES OF OPTIONAL IN JAVA 8


Null is bad, it can crash your program. Even its creator called it a
billion-dollar mistake hence you should always try to avoid using nulls whenever
you can. For example, you should not return a null String when you can return an
empty String, similarly never return null collections when you can return an
empty collection. I have shared many such tips in my earlier article, 10 tips to
avoid NullPointerException and my reader liked that a lot. But, I wrote that
article a couple of years ago when Java 8 was not around and there was no
Optional, a new way to avoid NullPointerException in Java, but, things have
changed now.




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Labels: best practices , core java , Java 8



TOP 5 COURSES TO LEARN DYNAMIC PROGRAMMING FOR CODING INTERVIEWS IN 2021 - BEST
OF LOT


Hello guys, If you are looking for a job and giving interviews then you might
have noticed that getting a Software development Job is becoming more and more
difficult every day. For example, there was a time when you can get a Java
developer position by just knowing Core Java concepts like String, Collections,
and Multithreading, etc, but, not anymore. There were definitely some questions
on Data structure and Algorithms and even on Dynamic Programming at that time as
well, but the focus was always on programming language expertise like Java or
Python. But, things have completely changed now, and the focus is more and more
on the candidate's ability to solve coding problems.




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Labels: courses , data structure and algorithm , online resources


MONDAY, OCTOBER 18, 2021


TOP 5 WEBSITES TO LEARN SQL ONLINE FOR FREE - BEST OF LOT


SQL is one of the most important skills for any programmer be it a Java, C++,
Python, JavaScript, or Ruby developer. Almost 95% of the Java applications use a
relational database in their back-end and almost all web applications use the
database. In recent years, one of the most common ways to learn any programming
skill is online, at your comfort of the office or home and SQL is no different.
Learning SQL online has another advantage of a quick head start because you
don't need to install a database and create tables to write some SELECT queries.
The installation and setup are definitely a tough part for beginners and I have
gone through that pain every time I have to learn a new database.




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Labels: best of javarevisited , database , online resources , SQL



TOP 10 JAVA AND WEB DEVELOPMENT COURSES FROM UDEMY IN 2021 - BEST OF LOT


Hello guys, I am sure you all have made your goals and resolutions for this
year, like what to learn in 2021. If you haven't, then check out my post 10
Things Java programmers should learn in 2021 for some ideas. If you have already
made your goal, then it is time to think about how you are going to achieve
them. For example, my top 5 goals in 2021 are to learn Java 15, AWS,
Microservices, Spring 5, and Spring Security 5, but how am I going to learn
them? Well, I like books and online courses, and that's why I have been
searching for some excellent courses on Java, Spring Boot, Microservices,
Docker, Web development, and Spring. 



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Labels: courses , java , online resources , programmers , spring



JAVA 8 DATE TIME - 20 EXAMPLES OF LOCALDATE, LOCALTIME, LOCALDATETIME


Along with lambda expressions, streams, and several minor goodies, Java 8 has
also introduced brand new Date and Time API, and in this tutorial, we will learn
how to use Java 8 Date Time API with simple how-to-do task examples. Java's
handling of Date, Calendar, and Time is long been criticized by the community,
which is not helped by Java's decision of making java.util.Date mutable and
SimpleDateFormat not thread-safe. It seems, Java has realized a need for better
Date and time support, which is good for a community which already used to of
Joda Date and Time API.




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Labels: date and time tutorial , Java 8



HOW GARBAGE COLLECTION WORKS IN JAVA


I have read many articles on Garbage Collection in Java, some of them are too
complex to understand and some of them don’t contain enough information required
to understand garbage collection in Java. Then I decided to write my own
experience as an article. You can call it a tutorial about garbage collection in
simple words, which would be easy to understand and have sufficient information
to understand how garbage collection works in Java. Garbage collection works by
employing several GC algorithms like Mark and Sweep, G1, etc. There are
different kinds of garbage collectors available in Java to collect different
areas of heap memory like you have serial, parallel, and concurrent garbage
collectors in Java.




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Labels: core java , garbage collection , JVM Internals



DIFFERENCE BETWEEN STACK AND QUEUE DATA STRUCTURE IN JAVA? EXAMPLE


Stack and Queue are two of the important data structures in the programming
world and have a variety of usage. As opposed to the array and linked list,
which are considered primary data structures, they are secondary data structures
that can build using an array or linked list. You can use Stack to solve
recursive problems and Queue can be used for ordered processing. The difference
between Stack and Queue Data structure is also one of the common questions not
only in Java interviews but also in C, C++, and other programming job
interviews.




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Labels: core java interview question , data structure and algorithm , java
collection tutorial



TOP 7 ONLINE COURSES TO LEARN BLOCKCHAIN, ETHEREUM, AND SOLIDITY FOR BEGINNERS
IN 2021 - BEST OF LOT


Hello guys, if you are not living under the rock, you would have definitely
heard about Blockchain and Cryptocurrencies. Blockchain is one of the most
in-demand skills, and there are not many people out there. If you want to learn
Blockchain and related technologies like Etherium, Solidity, Hyperledger, etc.,
and are looking for Blockchain training courses and certification, you have come
to the right place. But, before that, let get a quick overview of what
Blockchain is and why it's popular, and why you should learn Blockchain in 2021.




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Labels: Blockchain , courses , online resources



10 EXAMPLES OF CONVERTING A LIST TO MAP IN JAVA 8


Hello guys, suppose you have a list of objects, List and you want to convert
that to a Map, where a key is obtained from the object and value is the object
itself, how do you do it by using Java 8 stream and lambda expression? Prior to
Java 8, you can do this by iterating through the List and populating the map by
keys and values. Since it's an iterative approach and if you are looking for a
functional solution then you need to use the stream and lambda expression, along
with some utility classes like Collectors, which provides several useful methods
to convert Stream to List, Set, or Map.




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Labels: core java , Java 8 , Stream API examples



DIFFERENCE BETWEEN FIRST AND SECOND LEVEL CACHE IN HIBERNATE [ANSWER]


If you have used Hibernate in past then you know that one of the strongest
points of the Hibernate framework is caching, which can drastically improve the
performance of the Java application's persistence layer if configured and used
correctly. Hibernate provides caching at many levels e.g. first level cache at
Session level, second-level cache at the SessionFactory level, and query cache
to cache frequently executed SQL queries. The first level cache minimizes
database access for the same object. For example, if you call the get() method
to access Employee object with id = 1 from one session, it will go to the
database and load the object into memory, but it will also cache the object in
the first-level cache.




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By javin paul at October 18, 2021 4 comments
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Labels: hibernate , hibernate interview questions


SUNDAY, OCTOBER 17, 2021


TOP 5 COURSES TO LEARN WEB SECURITY IN 2021 - BEST OF LOT


Hello guys, if you want to learn Web Security and want to become a Security
expert and looking for the best online courses to learn Web Security then you
have come to the right place. Earlier, I have shared the best Cyber Security
Courses, Penetration testing courses, and best Kali Linux courses, and in this
article, I Am going to share the best courses to learn Web Security. If you
don't know Security experts are one of the highest paying jobs in Technology and
there is a huge demand for people who understand Security and protect against
cyber attacks, and that's where these best web security courses will help you. 




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Labels: courses , Cyber Security , security



TOP 5 COURSES TO LEARN RESTFUL WEB SERVICES IN JAVA WITH SPRING FOR EXPERIENCED
DEVELOPERS IN 2021


In the last article, I have shared some courses to learn Microservice
development with the Spring framework, and today, I'll talk about RESTful web
service developments. The REST API and RESTful Web Services need no
introduction, it's everywhere now and driving a new internet revolution. Most of
the software development in the webspace now also involves REST APIs. Gone are
the days where the only interface for a web application was the browser, now
most of them support REST APIs, which allows them to be accessible on any device
like mobile devices, tablets, apple watch, and any other digital gadgets. It
doesn't matter whether you are working for software giants like Amazon,
Facebook, or Google or working with startups like Uber or Netflix, REST APIs are
everywhere.




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Labels: courses , online resources , REST



HOW TO IMPLEMENT STACK DATA STRUCTURE IN JAVA? EXAMPLE TUTORIAL


The stack is one of the popular data structures which supports LIFO (Last In
First OUT) operation. Due to the LIFO advantage, you can use a stack data
structure to convert a recursive algorithm to an iterative one. The stack data
structure is very easy to implement using an array or linked list, but you don't
have to implement it on your own because Java already provides a Stack
implementation in java.util.Stack class. This class is a subclass of the Vector
class and you should use it whenever you need Stack for your production code,
there is no point in inventing the wheel again when the focus is on developing
your application.




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Labels: Coding Interview Question , core java , data structure and algorithm



TOP 10 ADVANCED SPRING FRAMEWORK COURSES FOR EXPERIENCED JAVA DEVELOPERS IN 2021
- BEST OF LOT


Hello guys, if you are a Java developer and want to learn Spring Framework
in-depth and looking for some advanced Spring online courses to learn things
like Spring Boot, Spring Cloud, Spring Data JPA, Spring Security, Spring MVC,
etc then you have come to the right place. Earlier, I have shared the best
courses to learn Spring Boot, Microservices, and Hibernate and JPA and in this
article, I am going to share the best and advanced Spring Framework courses for
experienced Java developers. There is no doubt that the Spring framework is
probably the most important skill for Java developers, but just knowing Spring
is also not enough. 



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Labels: courses , spring , spring boot


SATURDAY, OCTOBER 16, 2021


TOP 10 FREE CODECADEMY COURSES FOR BEGINNERS TO LEARN PROGRAMMING IN 2021 - BEST
OF LOT



Hello folks, if you are looking for best free Codecademy courses to learn
programming by yourself then you have come to the right place. In the past, I
have shared free online courses from Udemy, Coursera, Pluralsight, Educative,
and other websites and in this article, I am going to share best free Codecademy
courses to learn Programming with Java, Kotlin, JavaScript, PHP, R, HTML, CSS,
and many other useful programming languages. All these courses are tried and
tested by thousands of developers and they are available for FREE on Codecademy.
They are not only interactive but also updated regularly to teach you latest
best practices and updated information. 




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Labels: Codecademy , courses , free resources



TOP 5 COURSES TO LEARN NUMPY FOR PYTHON AND MACHINE LEARNING DEVELOPERS IN 2021
- BEST OF LOT



Hello guys, if you are learning Python or Data Science and want to learn NumPy
library and looking for the best resources then you have come to the right
place. EArlier, I have shared the best Python courses as well as the best
courses to learn Data Science and in this article, I am going to share best
courses to learn NumPy library, one of the most popular Python libraries for
numerical calculation. If you don't know, Python is almost the popular
programming language and has dominated every business sector from web
development to making artificial intelligent models and IoT devices and is
considered the most-loved language among data scientists and analyzers.




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Labels: courses , Data Science , machine learning , NumPy , python


FRIDAY, OCTOBER 15, 2021


TOP 5 COURSES TO LEARN TWITTER FOR MARKETING AND SALES IN 2021 - BEST OF LOT


Hello guys, if you are a blogger, content creator, coach, influencer, digital
marker, or online course creator, you may know that you can use Twitter for
marketing and sales in 2021. Twitter is one of the best social platforms for
marketing and selling eBooks, courses, classes, and anything, including physical
products. While the platform is excellent, it's not easy to master and use
Twitter effectively, and that's where these resources and online courses help
you. I have created this list based upon my own experience as a blogger, author,
and course creator, and I have also shared how Twitter helped me sell more of my
books. 



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Labels: courses , digital marketing , general , Twitter



130+ JAVA INTERVIEW QUESTIONS ANSWERS FOR 2 TO 7 YEAR EXPERIENCED PROGRAMMERS


Time is changing and so is Java interviews. Gone are the days, when knowing the
difference between String and StringBuffer can help you to go through the second
round of interview, questions are becoming more advanced and interviewers are
asking more deep questions. When I started my career, questions like Vector vs
Array and HashMap vs Hashtable were the most popular ones and just memorizing
them gives you a good chance to do well in interviews, but not anymore.
Nowadays, you will get questions from the areas where not many Java programmer
looks e.g. NIO, patterns, sophisticated unit testing or those which are hard to
master e.g. concurrency, algorithms, data structures and coding.




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Labels: core java interview question , interview questions , java interview
questions



TOP 5 COURSES TO CRACK COMPTIA PENTEST+ CERTIFICATION EXAM IN 2021 - BEST OF LOT


Hello guys, If you are preparing for the CompTIA PenTest+ exam and looking for
the best online courses and practice tests to boost your preparation, then you
have come to the right place. In the past, I have shared the best online courses
to pass CompTIA certifications like CompTIA IT Fundamentals, CompTIA
Server+,  CompTIA A+, Cloud+, and Security+. In this article, I will share the
best courses, practice tests, and exams simulators to prepare for the
prestigious Pentest+ certification. If you want to become  Pen Tester, then this
is the exam you should target.



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Labels: CompTIA Certifications , courses , Cyber Security , IT Certifications



TOP 15 TENSORFLOW INTERVIEW QUESTIONS AND ANSWERS FOR 1 TO 2 YEARS EXPERIENCED



Hello guys, if you are preparing for Machine Learning Engineer interviews or a
Data Science Interview and looking for popular TensorFlow interview Questions
then you have come to the right place. Earlier, I have shared the best courses
to learn TensorFlow and Machine Learning and in this article, we are going to
share the frequently asked TensorFlow questions for Interviews. These questions
cover key TensorFlow concepts and you can use them to revise TensorFlow before
your interview. They are good for both screening and Telephonic rounds of
interviews. 




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Labels: interview questions , machine learning , Tensorflow


THURSDAY, OCTOBER 14, 2021


TOP 5 COURSES TO LEARN KALI LINUX IN 2021 - BEST OF LOT



Kali Linux is an open-source Debian system based on Linux developed by the
offensive security company for ethical hackers. It contains more than 400 tools
categorized to make it easy for security researchers to analyze your network,
test the system security, discover different vulnerabilities inside a web
application, hide malware in apps, and target Android phones. If you want to
learn Kali Linux and looking for the best online courses to learn Kali Linux on
your own then you have come to the right place. Earlier, I have shared the best
Ethical Hacking courses and Cyber Security Courses, and in his article, I am
going to share the best Kali Linux courses for beginners. 




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Labels: courses , Cyber Security , Kali Linux , linux

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REFERENCES

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 2. jQuery Documentation
 3. Microsoft SQL Server Documentation
 4. Java SE 8 API Documentation
 5. Spring Documentation
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 7. Spring Security 5 Documentation




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