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Which of the following best describes what setInterval does?

easy📝 Conceptual Q2 of 15
Node.js - Timers and Scheduling
Which of the following best describes what setInterval does?
AExecutes a function repeatedly at fixed time intervals
BExecutes a function once after a delay
CStops a running timer
DExecutes a function immediately without delay
Step-by-Step Solution
Solution:

  1. Step 1: Identify setInterval behavior

    setInterval schedules a function to run repeatedly every specified milliseconds.

  2. Step 2: Differentiate from other timers

    setTimeout runs once after delay; setInterval repeats.

  3. Final Answer:

    Executes a function repeatedly at fixed time intervals -> Option A

  4. Quick Check:

    setInterval repeats function calls [OK]
Quick Trick: setInterval repeats function calls at intervals [OK]
Common Mistakes:
  • Confusing setInterval with setTimeout
  • Thinking setInterval runs only once
  • Believing setInterval stops timers

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