JS Interview test snippets

This tiny utility generates a JS-related technical test to be performed by interviewees during a developer recruitement process. It tests the knowledge about common pitfalls and edgy behaviours of Javascript, allowing to get a glance at the seniority of a JS developer. See below an example of a generated test.

Todo

• Add more test snippets
  • Case sensitivity
  • async/await
  • map/reduce
• Add answers+explanation in snippets source
• Filter out answers+explanation from snippets when generating test
• Utility to provide the result of a performed test
  • Percentage of success
  • Answers and explanation for each test snippet

Requirements

• node >= 8

Install

Clone repo, run npm install.

How to generate a test

Use the following command to generate a new test in the tests folder:

./generate --name "Han Solo" --num 2

Parameters

• num: Number of code snippets to include in the test (Optional, default: 10)
• name: String, name of candidate (Optional, default: John Doe)
• path: Path of generated test file (Optional, default: ./tests/)

Test sample

See below the generated test for the command ./generate --name "Han Solo" --num 2.

// Hi Han Solo!
//
// This test contains 2 code snippets.
// For each of this snippet, you have one or more question to answer.
// One or many answer may apply to the questions.
//
// Good luck, and have fun! :)


// -----------------------------------
// Snippet #1
// Given this code (executed in a browser):

var isDifferent = function (a, b) {
    return a != b;
};

console.log(isDifferent(2, "2"));

// What do you think may happen:
//
// 1. [ ] Logs `true` in console
// 2. [ ] Logs `false` in console


// -----------------------------------
// Snippet #2
// Given this code (executed in a browser):

var foo = function () {
    console.log(n);

    var n = 42;
};

foo();

// What do you think may happen:
//
// 1. [ ] ReferenceError: n is not defined
// 2. [ ] Nothing
// 3. [ ] Logs `42` in console
// 4. [ ] Logs `null` in console
// 5. [ ] Logs `undefined` in console



// Test generated on 2017-09-14 for candidate Han Solo.