What will happen if this single code is executed? 'use strict'; foo = true;
Correct Answer: Global variable will be created
Explanation:
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More JavaScript MCQ Questions
A form contains two fields named idl and id2. How can you copy the value of the id2 field to idl?
Which function determines whether the beginning of the paraml instance matches the param2?
What method can't be used with a window object?
What's the output? (function() { var objl = new Object({name: 'Jacob'}); var obj2 = new Object({name: 'Alex'}); console.log(objl == obj2); console.log(objl === obj2);
The following are sample codes on how to merge properties of two JavaScript objects dynamically: var objl = { food: var obj2 = { animal: 'dog' }
console.log(1 + +'2' + '2')
Value of x.length after running this code? x = ['foo']; x.quux = 'Hello'; x[1] = 'bar';
Evaluate: undefined + 2
What will: typeof typeof(null) return?
True or false ? typeof(null) == typeof(undefined)