Javascript Online Test

Which of the following is not the properties of screen objects in JavaScript?

Which of the following is not an example of closures?

Which of the following function of String object causes a string to be displayed in the specified size as if it were in a <font size = 'size'> tag?

Which character is used to break up a code line within a text string in JavaScript?

What will be the output of the following code snippet?

const example = ({ a, b, c }) => {
 console.log(a, b, c);
};
example(0, 1, 2);

Syntax for creating a RegExp object:
1. var txt=new RegExp(pattern,attributes);
2. var txt=/pattern/attributes;
Which of the above mentioned syntax will correct?

What will be the output of the following JavaScript code?

let x = 10; 
document.write(typeof x, " , ", typeof String(x));

What will be the output of the following JavaScript code?

let x = "10";
let y = + x;
    
document.write(typeof y);

What will be the function of the following JavaScript code?

var scope = "global scope";
function checkscope() 
{
    var scope = "local scope"; 
    function f() 
    { 
         return scope; 
    }
    return f;
}

Which JavaScript method is used to create a new array with array elements that passes a test?

Which is the correct syntax to declare a constant in JavaScript?

Both the "rduucedRight()" and "reduce()" methods follow which one of the following common operation?

Which of the following function of String object returns a string representing the specified object?

How are objects compared when they are checked with the strict equality operator?

Which of the following is the correct output for the following JavaScript code:

function display1(option)  
{  
    return(option ?  "true" :  "false");  
}  
    bool ans=true;  
console.log(display1(ans));  

What is the output of the following JavaScript code?

var a = 10 + 20 + "5";
console.log(a);

typeof `${{Object}}`.prototype

For which purpose the array "map()" method is used?

Which of these data interchange formats has seen a decline in usage in favor of JSON?

Which method returns the character at the specified index?

Which object in Javascript doesn’t have a prototype?

To know the identifier of the user’s OS, we use ______?

How to detect the name of the client’s browser?

Which event is specific to the keyboard?

Can be redeclare a variable that is declared with let keyword?

Which one of the following operator is used to check weather a specific property exists or not:

Which of the following function of Number object returns a string value version of the current number?

Which is the exponentiation operator in JavaScript?

What types of values can you have in JSON key:value pairs?

Which of the following statements is not true about this example?

const obj = {
  outer: function() {
    const self1 = this

    const inner1 = () => {
      const self2 = this

      const inner2 = () => {
        const self3 = this
      }
    }
  }
}