JavaScript MCQ › Javascript loops MCQ › Question #5067
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QWhat could the statement debugger in the following JavaScript code be doing? 
function f(o) 
{
     if (o === undefined) debugger;
}

ID: #5067 Javascript loops MCQ 192 views
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#5067Q ID
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Javascript loops MCQTopic
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  • A It does nothing but a simple breakpoint ✔ ✖
  • B It debugs the error in that statement and restarts the statement's execution ✔ ✖
  • C It is used as a keyword that debugs the entire program at once ✔ ✖
  • D It is used to find error in the statement ✔ ✖
Correct Answer: Option A

Explanation

The debugger statement typically has no effect. However, if a debugger is available and running, the implementation may (but is not required to) perform some kind of debugging action.
In practice, this statement functions like a breakpoint, causing the execution of JavaScript code to stop and allowing you to use the debugger to print out the values of variables.

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