JavaScript Test 1

What function in JavaScript is used to prompt the user for input?

• input()

• prompt()

• ask()

• getInput()

What does the value null represent in JavaScript?

• A defined variable.

• An undefined variable.

• A boolean value.

• A nullified function.

Which operator is used to concatenate strings in JavaScript?

• +

• -

• *

• /

What does an if statement do in JavaScript?

• Executes a block of code repeatedly.

• Executes a block of code only if a specified condition is true.

• Terminates the program.

• Declares variables.

What is the difference between a while loop and a for loop?

• A while loop requires a counter variable.

• A for loop cannot contain conditions.

• A while loop executes a block of code while a condition is true, without an explicit counter.

• A for loop is more efficient for iterating over arrays.

Which keyword is used to add alternative code to an if statement, to be executed if the condition is false?

• else

• and

• or

• then

Which of the following is a valid JavaScript variable name?

• 2ndVariable

• _variable

• $variableName

• variable name

var city = "New";

var country = "York";

var location = city + " " + country;

console.log(location);

What is the output of the above Javascript code?

• "NewYork"

• "New York"

• "city country"

• "location"

How do you terminate a for loop prematurely in JavaScript?

• Using return;

• Using exit;

• Using break;

• Using continue;

Which of the following correctly stores user input into a variable name?

• var name = prompt("Enter your name:");

• prompt("name");

• name = prompt();

• input(name);