Introduction to JavaScript Quiz

What is the correct syntax to output "Hello World" in JavaScript?

• `print("Hello World")`

• `console.log("Hello World")`

• `echo "Hello World"`

• `System.out.println("Hello World")`

Tags

DOK Level 1: Recall

Which of the following is a correct way to declare a variable in JavaScript?

• `var myVar;`

• `variable myVar;`

• `v myVar;`

• `declare myVar;`

Tags

DOK Level 1: Recall

What is the output of the following code? ```javascript var x = 5; var y = 10; console.log(x + y); ```

• `15`

• `510`

• `undefined`

• `NaN`

Tags

DOK Level 1: Recall

Which of the following is NOT a data type in JavaScript?

• `String`

• `Number`

• `Boolean`

• `Character`

Tags

DOK Level 1: Recall

What is the value of `typeof null` in JavaScript?

• `null`

• `object`

• `undefined`

• `boolean`

Tags

DOK Level 1: Recall

Which of the following is used to declare a constant in JavaScript?

• `var`

• `let`

• `const`

• `constant`

Tags

DOK Level 1: Recall

What will be the output of the following code? ```javascript let a = 10; a = 20; console.log(a); ```

• `10`

• `20`

• `undefined`

• `Error`

Tags

DOK Level 1: Recall

Which of the following is the correct way to create an array in JavaScript?

• `var arr = "1, 2, 3";`

• `var arr = [1, 2, 3];`

• `var arr = (1, 2, 3);`

• `var arr = {1, 2, 3};`

Tags

DOK Level 1: Recall

What is the result of the following expression? ```javascript typeof "Hello" ```

• `string`

• `object`

• `undefined`

• `boolean`

Tags

DOK Level 1: Recall

Which of the following is a correct way to declare a function in JavaScript?

• `function myFunction() {}`

• `def myFunction() {}`

• `func myFunction() {}`

• `function: myFunction() {}`

Tags

DOK Level 1: Recall