Frontend Quiz-6 Summer internship

What is the correct way to create a JavaScript object?

• A) var obj = {};

• B) var obj = ();

• C) var obj = [];

• D) var obj = {};

How do you add a property to an existing JavaScript object?

• A) obj.property = value;

• B) obj->property = value;

• C) obj.property(value);

• D) obj[property] = value;

Which method is used to select an element by its ID in the DOM?

• A) document.querySelector("#id");

• B) document.getElementById("id");

• C)

  document.getElementsByClassName("id");

• D) document.getElementByTagName("id");

Which of the following is the correct syntax for an if statement in JavaScript?

• A) if (condition) {}

• B) if condition {}

• C) if [condition] {}

• D) if {condition} {}

What does the "switch" statement do in JavaScript?

• A) Iterates over a collection

• B) Switches the value of a variable

• C) Evaluates an expression and matches the value to a case clause

• D) Changes the value of a variable based on its type

Which method is used to create a new HTML element in the DOM?

• A) document.createElement("tagName");

• B) document.newElement("tagName");

• C) document.buildElement("tagName");

• D) document.addElement("tagName");

How do you check if an object has a specific property?

• A) object.hasProperty("property");

• B) object.contains("property");

• C) object.hasOwnProperty("property");

• D) object.include("property");

Which of the following is not a valid way to define a function in JavaScript?

• A) function myFunction() {}

• B) var myFunction = function() {};

• C) const myFunction = () => {};

• D) function: myFunction() {}

Which event occurs when the user clicks on an HTML element?

• A) onmouseover

• B) onhover

• C) onclick

• D) onchange

Which object represents the HTML document in the DOM?

• A. window

• B. document

• C. element

• D. body