June's First Quiz

Which one of the following is the correct way to declare a variable called myAge, that contains a number data type?

• let myAge = 23;

• let myAge = "23";

• myAge = 23;

• myAge(23);

What will be the output of the following code

let name = "June";

console.log(name[1]);

• J

• u

• undefined

• 1

What will be the output of the following code

let name = "June";

console.log(name.length);

• The code won't run

• June

• 4

• 3

Which of the following is the correct way to declare an array variable?

• let arr = (1, 2, 3);

• let arr[1, 2, 3];

• let arr = [1, 2, 3];

• arr = [1, 2, 3];

What does .push() do in JavaScript?

• Inserts an element to the end of an array

• Inserts an element to the beginning of an array

• Removes the first element from an array

• Removes the last element from an array

What does .unshift() do in JavaScript?

• Inserts an element to the end of an array

• Inserts an element to the beginning of an array

• Removes the first element from an array

• Removes the last element from an array

What does .pop() do in JavaScript?

• Inserts an element to the end of an array

• Inserts an element to the beginning of an array

• Removes the first element from an array

• Removes the last element from an array

What does .shift() do in JavaScript?

• Inserts an element to the end of an array

• Inserts an element to the beginning of an array

• Removes the first element from an array

• Removes the last element from an array

Which of the following is a correct way to declare a function called calculate that accepts 2 parameters?

• function = calculate(x, y) {}

• function calculate([x, y]) {}

• function calculate(x, y) {}

• calculate(x, y) {}

Which of the following is a correct way to run a function called calculate that accepts 2 parameters?

• calculate([1,2]);

• calculate(2);

• calculate(1, 2);

• calculate();