Top 10 Programming Languages to Learn in 2021

As 2020 is approaching its end, we have started working on our new year resolutions and thought it would be a good time to suggest some interesting goals to our readers too. As the world quickly shifts more and more towards technology, it is very important to have some software skills that one could use to set his feet in the world of software development. The best place to start is to learn a few programming languages. In the 90s there were a handful of programming languages being used worldwide, but in this day and age, there are dozens of good programming languages, each suitable for different kinds of usage. It might be hard for a beginner to decide which language to learn first. You might pick a very useful language, but it might be too hard for beginners, or you might pick an easy one that has little to no utility.

Read Also: 10 Tips to Become Better Java Developer

Whatever language you choose, it requires a lot of time and effort to learn so it would be better to focus your efforts at the right place. If you start at the right place it could show great results in the long run and set you up for a good career in the field of software development. The languages we cover in this article will go a long way in helping you land a job in even the best companies like Google, Facebook, and Apple.

This list of top programming languages for the year 2021 will certainly help you lay a strong foundation in the field of software design and development.

10 Programming Languages to Learn in 2021


It must be noted that this list might be a little different from some other lists you will find online because this heavily relies on our own experiences and the languages that have helped us in our journey as Computer Programmers.

Top 32 Java Interview Questions for 2 to 3 Years Experience

In this post, I will be sharing the most frequently asked java interview questions for 2 to 4 years experienced. Relax, the expectation from the 2 to 4 years experienced guy is not the same as for senior java developers. I have categorized the interview questions into topics such as the OOPs concept, Collection framework, Exception Handling, String, Serialization, Java Multi-threading, and Coding basic questions. Please bookmark this page. I have added many links in the article so that it will be helpful for you to get a detailed explanation of the question. Let's dive deep into the interview questions with answers.

Java Interview Questions for 2 to 3 Years Experience


Q1 List down methods present in the Object class?

Below are the important methods present in the Object class:

a. clone(): this method is used to create a clone of the object
b. equals(): this method is used to check whether objects are equal.
c. hashCode(): this method returns the hash value of the object.
d. toString(): this method returns the String representation of the given object.

How to Add Delay in Java For Few Seconds

In this tutorial, I will be sharing how to add a delay in java for a few seconds. Sometimes we need to introduce a delay in the execution of our java program. It can be achieved in 3 ways.

1. Using Thread.sleep() method
2. Using TimeUnit.XXX.sleep() method 
3. Using ScheduledExecutorService  

Let's dive deep into the topic.

Read Also: Multithreading Interview Questions

Add Delay in Java For Few Seconds

1. Using Thread.sleep() method 

The easiest way to delay a java program is by using Thread.sleep() method. The sleep() method is present in the Thread class. It simply pauses the current thread to sleep for a specific time. 
Syntax:

Thread.sleep( time In Milliseconds)


Note: Unit of time for Thread's class static sleep method is in milliseconds. So, in order to delay for 7 seconds, we need to pass 7000 as an argument in the sleep method.

[Solved] Add Internet Permission in AndroidManifest.xml in Android studio

In this tutorial, I will be sharing how to add internet permission in Android studio. When you are working on app that wants to access internet and facing the below warning/issue in LogCat.

java.net.SocketException: Permission denied (maybe missing INTERNET permission)

Solution


In order to access the internet in your app, add the below line in your AndroidManifest.xml that will solve the internet permission.

<uses-permission android:name="android.permission.INTERNET" />


Please paste the above line before the <application> tag otherwise it will give warning.

Note: The permission name is case-sensitive i.e wrong case means your application does not get the internet permission.


WRONG
<uses-permission android:name="ANDROID.PERMISSION.INTERNET" />

Convert list to set in Python

In this tutorial, I will be sharing how to convert list to set in python. As we know set does not allow duplicates i.e contains only unique elements without any order. Our main goal should be to remove all the duplicates present in the given list.


Note: We will use python set() method to convert list to set.

Example of Converting list to set in Python

1. Converting list of String to set in Python Example


Below is the python program to convert list of String to set.