JavaScript MCQ › Javascript loops MCQ › Question #5071
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QWhat could the statement debugger in the following JavaScript code be doing? 
function f(o) 
{
     if (o === undefined) debugger;
}

ID: #5071 Javascript loops MCQ 169 views
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#5071Q 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 doesn't have any effect when executed.
However, if a debugging program is active and running, it may trigger some type of debugging action.
Essentially, this statement acts like a breakpoint, which means the execution of JavaScript code will be halted, and you will be able to examine variable values using the debugging tools.

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