Predict-the-Output Quiz

72 real interview snippets. Read the code, predict what it prints before revealing — then grade yourself honestly. This is the category that trips up even experienced JS devs.

— Pick a focus to start a round
What does this output?
 
 
Output
 
 
 
 
   
 
 Did you get it right? 
   
 
 
  
 
 
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