Best Online Code Editor For Interviews

The best online code editor for interviews is, without a doubt, Repl.it. It’s the most developer-friendly tool on the market, and has been used in over 140 countries around the world to train, test, and collaborate with other developers. Whether you’re looking to practice your coding skills alone, take an interview with another developer, or set up a team of coders to work on a project together, Repl.it makes it easy.

Best Online Code Editor For Interviews

1. CoderPad

What’s CoderPad?

CoderPad is the market’s leading technical interview solution. Developer candidates are able to write, execute and debug code as part of a live, pair-programming interview.

CoderPad’s live collaborative coding interviews make it simple and convenient to assess candidates’ technical skills. Hiring managers get a better idea of candidates’ thought process and problem-solving reflexes – making it easier to hire the right candidate – fast.

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coderpad

CoderPad’s main features 

  • 30+ supported programming languages with optimal runtimes 
  • Custom files and database environments can be uploaded to use alongside questions and interviews
  • Video, audio and drawing mode options for real-time collaboration
  • Interview playback and note-taking options for post-interview review

How much does CoderPad cost?

CoderPad has a free trial available. Pricing starts at $50/month and can reach up to $750/month.

coderpad pricing

2. CoderByte

What’s CoderByte?

CoderByte is a comprehensive code assessment platform. Its coding interview tool allows you to conduct interviews remotely and in real-time. 

After selecting promising candidates, you can use CoderByte to create easy-to-use interview templates, and kickstart various whiteboard sessions. Furthermore, code-pairing with your chosen candidates happens in a live environment. 

Following a live interview, you can replay a session to better assess whether or not a candidate matches your company culture and suits a job position. 

coderbyte

CoderByte’s main features

  • 400+ coding challenges to be used for interviews
  • An extensive list of ATS integrations
  • Integrated video, audio and chat
  • Custom, reusable interview templates 

How much does CoderByte cost?

CoderByte costs $199/month and if you choose to pay annually, the fee drops to $1,188/year ($99/mo). 

3. HackerRank

What’s HackerRank?

HackerRank is a coding interview tool that operates on a single, fully-functioning integrated development environment (IDE). It enables candidates to showcase their coding skills in a pair programming environment.

For HR leaders, HackerRank comes with numerous coding challenges for candidates, starting from the simplest all the way to the most complex in the full-stack engineering environment. 

To save time and make the feedback process as productive as possible, the tool has skill-based scorecards and integrated interview prompts to keep you aligned with your company’s needs, developer-wise.

Furthermore, to make the virtual experience more “human”, HackerRank recently released Virtual Onsite Experience; a feature that eliminates complications associated with multiple interview sessions done remotely. Its aim is to streamline processes by elevating user experience for all parties involved. In simple terms, Virtual Onsite Experience introduces a virtual lobby where candidates can “arrive” earlier, relax, and prepare for the interview.

hackerrank

HackerRank’s main features

  • Import and discuss code submissions from technical tests
  • 40+ supported programming languages
  • Customizable, developer-friendly editor (dark/light theme, autocomplete, REPL support, etc.)
  • Interviewer scorecard for easy interview decisions

How much does HackerRank cost?

HackerRank’s pricing system starts at $25/month (billed annually) and can reach $599/month. There’s also a free trial available.

hackerrank pricing
To screen your candidates easily, you can try CodinGame Assessment. 96.98% of developers who start a test on CodinGame finish it. Why? Because our exercises give techies a real sense of challenge, the fun way.

4. CodeSignal

What’s CodeSignal?

CodeSignal is a comprehensive cloud-based interview solution that enables you to launch and scale remote technical interviews on a superior level. 

The tool provides a coding environment that resembles Visual Studio Code, at the same time offering capabilities like debugging mistakes and running unit tests. CodeSignal makes the collaboration between a recruiter and a candidate more personal and intuitive. 

The tool can help you measure candidate skills that genuinely matter via proper task types and various algorithmic questions. With CodeSignal, remote technical interviews can be launched in days, thus making sure your entire hiring team is engaged and in sync. 

codesignal

CodeSignal’s main features

  • 70+ languages, frameworks and libraries
  • Monaco-powered IDE with autocomplete, syntax highlighting, inline documentation, hotkeys, etc.
  • Virtual whiteboard feature
  • Project-style questions with multiple files and unit tests

How much does CodeSignal cost?

CodeSignal does not publicly specify a cost applied for using the tool. The only option available is a demo, after which you receive a customized offer. 

5. Codility

What’s Codility?

Codility’s coding interview tool is called CodeLive. It can be used to conduct remote interviews via Codility’s virtual whiteboard feature. CodeLive uses a live shared environment with real-life tasks for developers. This means that your teams can easily conduct remote interviews without impacting the quality of a tech-oriented interaction between recruiters and candidates.

To create a natural, human-like interview experience, you can easily set up rooms and run code with your candidates. This way, you can have a clear overview of their abilities, at the same time creating meaningful connections. 

codility

Codility’s main features

  • Live pair programming in an “online room”
  • Automatic scorecards and feedback forms
  • Flexible interview setups (based on custom tasks, pre-selected templates or previous submissions)
  • Seamless integrations with candidate management systems

How much does Codility cost?

Pricing and licencing depends on the scale of your company’s recruitment needs. Codility does not express any flat fees for using the tool, and you have to request pricing. 

coding interview questions

Q #1) How can you reverse a string?

Answer: String is reversed with the following algorithm:

  1. Initiate
  2. The string which is to be reversed is declared.
  3. Get the length of the string.
  4. Start a loop and then swap the position of the array elements.
  5. Keep the exchanged positions.
  6. Print the reversed string.

Q #2) What is a palindrome string?

Answer: After the string is reversed as discussed in Q #1, we need to put the following condition:

Code snippet:

if(actualtxt.equals(reversetxt)){   return “Palindrome”;else     return “Not Palindrome”;}

Thus palindrome string is the one which on reversing remains the same, for example, – ‘madam’ is a palindrome string.

Q #3) How to get the matching characters in a string?

Answer: To get the matching characters in a string, the below steps are followed:

  1. Hash Map data structure is taken which works with the key-value pair.
  2. Loop the strings, character by character, and verify if that character of the string exists in the hash map or not.
  3. If the result is true, the counter for the character in the hash map is increased or else then put a count as 1.
  4. Once the loop ends, then the Hash map is traversed and print the characters with more than 1 count.

Code snippet:

HashMap<Character, Integer> mp = new HashMap<> ();   for (int j = 0; j<text.length (); j++) {       char ch = text.charAt(j);          if(mp.containsKey(ch)){                int cnt = mp.get(ch);             mp.put(ch, ++cnt);         }else{            mp.put(ch, 1);          }}Set<Character> charct = map.keySet(); for (Character ch: charct){     int c= mp.get(ch);     if(c>1){        System.out.println(ch+ " - " + c);     }}

Q #4) How to get the non-matching characters in a string?

Answer: To get the non-matching characters in a string, the below steps are followed:

  1. Hash Map data structure is taken which works with the key-value pair.
  2. Loop the string, character by character, and verify if that character of the string exists in the hash map or not.
  3. If the result is true, the counter for the character in the hash map is increased or else then put a count as 1.
  4. Once the loop ends, then the Hash map is traversed and print the characters with a count equal to 1.

Code snippet:

HashMap<Character, Integer> mp = new HashMap<> ();   for (int j = 0; j<text.length (); j++) {       char ch = text.charAt(j);          if(mp.containsKey(ch)){                int cnt = mp.get(ch);             mp.put(ch, ++cnt);         }else{            mp.put(ch, 1);          }}Set<Character> charct = map.keySet();for (Character ch: charct){     int c= mp.get(ch);     if(c==1){        System.out.println(ch+ " - " + c);     }}

Q #5) How to calculate the number of vowels and consonants in a string?

Answer: To calculate the number of vowels and consonants in a string, the below steps are followed:

  1. Get the string on which count has to be performed.
  2. Run a loop from 0 to the length of the string.
  3. Take a single character at a time and verify if they are a part of the group of vowels.
  4. If the result is true, increase the count of vowels or else increment the count of consonants.

Code snippet:

for (int k = 0; k < text.length(); k++) {    char c = text.charAt(k);    if (c == 'a' || c == 'e' || c == 'i' ||        c == 'o' || c == 'u')               owls += vowlselse            consonts += consonts}System.out.println("Vowel count is " + vowls); System.out.println("Consonant count is: " + consonts);

Conclusion

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