Week 9.1

In which HTML element, we put the JavaScript code?

• <javascript>...</javascript>

• <js>...</js>

• <script>...</script>

• <css>...</css>

JavaScript code can be written in ____.

• JavaScript file (.js file)

• HTML document directly

• JavaScript file and in HTML document

• In style sheets (.css file)

Which symbol is used separate JavaScript statements?

• Comma (,)

• Colon (:)

• Hyphen (-)

• Semicolon (;)

JavaScript ignores?

• newlines

• tabs

• spaces

• All of the above

Which JavaScript method is used to access an HTML element by id = "demo"?

• getElement("demo")

• getElementById("demo")

• elementById("demo")

Which JavaScript method is used to write HTML output?

• document.write()

• document.output()

• console.log()

• document.writeHTML()

Which JavaScript method is used to write on browser's console?

• console.output()

• console.writeHTML()

• console.log()

• console.write()

Which JavaScript method is used to write into an alert box?

• window.alertHTML()

• window.alert()

• window.alertBox()

• window.alertContent()

Which is the correct JavaScript statement to print the addition of two numbers 10 and 20 in a paragraph whose id is 'result'?

• getElementById("result").innerHTML = 10+20;

• getElementById("result").innerHTML = "10+20";

• getElementById("result").innerHTML = '10+20';

What is the main difference between var and let keywords in JavaScript?

• var defines a variable while let defines a constant

• var defined function scoped variable while let define block scoped variable

• The value of a variable declared with var can be changed while the value of a variable declared with let cannot be changed