Bird
0
0

Identify the error in this Node.js code snippet:

medium📝 Debug Q6 of 15
Node.js - Debugging and Profiling
Identify the error in this Node.js code snippet:
console.count();
console.count('label');
ANo error; code runs fine
Bconsole.count() requires a label argument; missing in first call
Cconsole.count() only accepts numbers as arguments
Dconsole.count() cannot be called twice
Step-by-Step Solution
Solution:

  1. Step 1: Check console.count() argument requirements

    console.count() can be called without arguments; it uses 'default' label internally.

  2. Step 2: Verify multiple calls

    Multiple calls with or without labels are allowed and counted separately.

  3. Final Answer:

    No error; code runs fine -> Option A

  4. Quick Check:

    console.count() accepts optional label [OK]
Quick Trick: console.count() label is optional; defaults to 'default' [OK]
Common Mistakes:
  • Assuming label is mandatory
  • Thinking multiple calls cause error
  • Expecting only string labels allowed

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Node.js Quizzes
Child Processes - exec for running shell commands - Quiz 13medium Child Processes - Why child processes are needed - Quiz 4medium Cluster Module - Master and worker processes - Quiz 14medium Debugging and Profiling - Node.js built-in debugger - Quiz 2easy Error Handling Patterns - Why robust error handling matters - Quiz 7medium Timers and Scheduling - setTimeout and clearTimeout - Quiz 2easy Timers and Scheduling - AbortController for cancellation - Quiz 14medium Timers and Scheduling - Why timing matters in Node.js - Quiz 13medium Worker Threads - Creating worker threads - Quiz 8hard Worker Threads - Worker pool pattern - Quiz 1easy