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BasicJavaScript~8 min

Count occurrences of each character

Frequently asked in Infosys, TCS, Capgemini automation interviews

Points available

100/100

Your mission

  1. Read
  2. 2Run
  3. 3Submit
  4. 4Solve

Write charCount(str) that returns an object mapping each character to how many times it appears.

Ignore spaces. Keep the original case.

Examples

charCount("test") → { t: 2, e: 1, s: 1 }

Hints

Each hint costs 10 points on a full solve.

Interviewer follow-ups

  • How would you return only the most frequent character?
  • Map vs object: when would you choose Map?

Ctrl+Enter to run · add Shift to submit

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Tab inserts two spaces. Press Escape, then Tab, to leave the editor.
Terminal

$ node solution.js

Run executes the open file. Submit scores solution.js against hidden tests.

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