Q. What is the purpose of the trace_var method in Ruby?
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(A)
To create a new instance of a variable
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(B)
To track the usage of a specific variable throughout the execution of a program
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(C)
To print the current value of a variable to the console
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(D)
To set a callback that is triggered whenever a global variable is accessed or modified
✅ Correct Answer: (D)
To set a callback that is triggered whenever a global variable is accessed or modified