10 Best Places for Coding Interview Questions
My favorite website to practice Java coding interview questions along with LeetCode and HackerRank
Hello folks, If you are a fresher or final year graduate preparing for your placement interview, or a Java developer preparing for your next job and looking for some websites, blogs, and forums for programming interview questions then you have come to the right place.
In this article, I am going to share some of the really good websites and resources that will help you to prepare and do well in programming interviews.
Though there are a large number of good books with lots of programming questions like Cracking the Coding Interview by Gayle Laakmann McDowell, and Programming interview exposed, they are not the most interactive or comprehensive resources.
Since with time, interviews are also changing you need to keep yourself updated with the latest programming job interviews and Java questions. Now, you just cannot pass a programming job interview without writing code, which wasn’t the case 10 years ago.
Though I still recommend those books highly because Programming questions do not really change a lot, you can take the help of the following websites to learn more and prepare well for your Programming job interview.
Alternatively, you can also explore online courses like Master the Coding Interview: Big Tech (FAANG) Interviews by Andrei Negaoie on Udemy to properly prepare for coding Interviews. They cover topics like data structure and algorithms, general programming, and bit manipulation, an important topic for interviews. You can also get this course on ZTM Academy and can use code FRIENDS10 to get 10% discount.
10 Websites for Practicing Java Coding Interview Problems
Here is my list of some of the useful websites you can visit to prepare for your next programming job interview:
1. LeetCode
LeetCode is a great and relatively new website with a huge number of questions. It’s the real site for preparing a programming job interview. It has got coding problems with a well-defined problem statement and asks you to solve the problem and submit the solution to any of you.
By the way, if you have trouble solving LeetCode problems then you can also check out Bit Punch’s LeetCode in Python: 50 Algorithms Coding Interview Question course on Udemy. This course goes through hard to easy LeetCode problems and explains to you how to solve them.
2. Algo monster
This is another website you can checkout for coding interview preparation. It doesn’t teach you how to solve a particular coding problem but how to find the underlying pattern which can then be used to solve many more coding problems.
Apart from reading one of these books, you can also join Algomoster to get a boost to your coding interview preparation. You will learn the most important patterns and get results in the shortest amount of time possible.
It contains more than 48 Coding Patterns, meticulously Curated by Google Engineers, and more than 325 Lessons and Problems, 678 Illustrations along with Object-Oriented Design and System Design questions to make yourself completely ready for your next coding interview.
You can subscribe to Algomonster now for just $99 (69% discount) and give your interview preparation a new edge. Here is also a nice diagram from Algomoster which tells what patterns you should learn for your coding interview.
3. Javarevisited
Disclaimer first, this is my blog. I mostly provide a frequently asked, curated list of programming interview questions on various topics like Java, Coding, String, Array, Data Structure and Algorithms, Design pattern, Servlet, JSP, Spring, Hibernate, Web service, REST, SOAP, UNIX, Linux, SQL, and Database, etc.
It basically contains several articles to help you prepare well for your programming interviews, particularly for Java Job interviews. I also take the time to explain which answer is right and what is wrong and why so you can learn as well while preparing for programming job interviews.
However, if you want to prepare a topic from scratch like algorithms, I suggest joining a comprehensive course like Data Structure and Algorithms: Deep Dive Using Java on Udemy.
4. GeeksForGeeks
GeeksForGeeks is a great website that has lots of programming questions from various tech companies like Amazon, Google, Facebook, Microsoft, Flipkart, Uber, etc. It’s mainly a user contribution-based website where users contribute programming questions in the form of short summaries and articles.
The GeeksForGeeks team also write an article to explain concepts that are important from the programming point of view like data structure and algorithms like Trie, Red-BlackTree, Self-Balanced Tree, etc.
Overall a comprehensive source for lots of programming questions but you need to spend the time to find good ones. However, if you find trouble solving GeeksForGeeks coding problems then I also recommend you to first go through Grokking the Coding Interview: Patterns for Coding Questions course on Educative.
It will teach you common coding patterns like sliding windows, fast and slow pointer, merge interval, etc which can be applied to many coding problems. These are essential for any programmer and help a lot to solve a new coding problem during the interview.
By the way, Educative is also a great platform for preparing for coding interviews. It has so many good interactive courses like Grokking the System Design Interview, Grokking The object-oriented programming interview, and Dynamic Programming which can help you better prepare for coding interviews.
And if you find those interactive courses useful, consider getting an Educative subscription which costs around $18 per month and provides access to their 100+ software engineering courses including these ones. It’s both cost-effective and the best way to prepare for your coding interviews.
5. HackerRank
Another website is full of challenging coding problems. You can join the website not just for programming job interview questions but also to improve your coding skills by solving challenging questions.
The good thing about HackerRank is that it’s also used by many companies for technical assessment and remote interviews which means if you have a strong profile on HackerRank you may get matched with a suitable opportunity.
If that’s not enough, more than 11 million developers use HackerRank to practice coding skills, prepare for interviews, and get hired. You can be one of them too.
6. CareerCup
A website where you will find a lot of programming job interview questions from different companies. This site is founded by Gayle Laakmann McDowell, author of Cracking the Coding Interview book and other famous books around Job interviews. This is a great resource for people preparing for technical job interviews.
7. Code Career Blog
Another blog where you will find a lot of programming job interview questions and their solution with proper analysis. Blogger, Harry He is also the author of Coding Interviews: Questions, Analysis & Solutions, one of the excellent books to prepare for Programming Job interviews.
8. Java67
Well, this is the site where you are currently, reading this very own article. I have shared a lot of useful programming job questions. You can find them by topic like an array, string, linked list, binary tree, etc.
Alternatively, you can also use the search bar to search for coding interview questions and if you are in hurry then I strongly suggest you at least check out these 100+ data structure questions and 10 SQL query questions from Programming job interviews before you go for your next coding interviews.
These are two of the most important topic for any programming job interviews and having gone through them you will have a better understanding of what to expect on technical job interviews.
9. TopCoder
A large number of Practice Problems. Some of them are very tough to solve but you will learn a lot if you attempt those questions. There are also competitions and bounty programs where you can not only learn but also earn by solving technical coding problems.
10. Spoj
very tough and with real-time algorithms and only recommend if you have enough time in your hand and you truly want to master your coding skills.
11. CodeChef
It’s a great online platform for Aspiring programmers. Created by Directi, one of the leading software company this platform help you learn and master Algorithms and Computer Programming. You will also find a lot of programming contests on this site. It also provides certifications.
That’s all about this list of top websites for Programming interview problems. Depending upon which niche you are you can also focus on one of the sites for data structure and algorithm, GeeksforGeek has got a large number of problems but Javarevisited is the best for preparing Java interviews.
LeetCode is also a great resource for data structure and algorithms particularly String and array, and nowadays it’s also got some SQL and database questions and some bash script questions.
Other Programming Resources you may like
- 10 Courses to Prepare for Programming Interviews
- 20+ binary tree coding problem for practice
- 21 String coding problem for practice
- 20+ array coding problem for practice
- 20 linked list coding problem for practice
- 5 Free Spring Framework Courses for Java Developers
- 5 Courses to Learn Shell Scripting in Linux
- 5 Online Courses to learn Core Java for Free
- 5 Online training courses to learn Angular for Free
- 5 Free Courses to Learn Data Structures and Algorithms
- 5 Courses to learn Android for Java Developers
- 5 Free Courses to Learn Git and Github
- 50+ Data Structure and Algorithms Questions from Interviews
- 10 Data Structure and Algorithm Courses for Interviews
Thanks for reading this article so far. If you like these online courses to prepare well for programming job interviews then please share with your friends and colleagues. If you have any question or feedback then please drop a note.
P.S. — If you prefer books then you can also check out my list of top 10 books to prepare coding interviews.
