String Methods & Concatenation

This video tutorial covers the basics of strings in JavaScript, including concatenation, appending, and creating sentences with variables. It explains how to handle special characters using escaping and explores various string properties and methods such as length, concat, split, replace, and includes. The tutorial also touches on advanced string manipulation techniques and emphasizes the importance of understanding these fundamentals for JavaScript programming.

What is the result of concatenating 'Hello' and 'World' using the '+' operator?

• WorldHello

• HelloWorld

• Hello+World

• Hello World

How can you append 'Smith' to the variable 'name' which already contains 'John'?

• name = 'Smith' + name

• name += ' Smith'

• name = 'John Smith'

• name = 'John' + 'Smith'

What is the purpose of escaping characters in a string?

• To change the string to uppercase

• To include special characters without ending the string

• To add special effects

• To concatenate strings

Which of the following is a correct way to use template literals?

• 'Hello, ${name}'

• Hello, ${name}

• `Hello, ${name}`

• "Hello, ${name}"

What does the 'length' property of a string return?

• The number of spaces in the string

• The number of vowels in the string

• The number of words in the string

• The number of characters in the string

How can you convert a string to uppercase in JavaScript?

• string.toUppercase()

• string.toUpperCase()

• string.toUpper()

• string.upperCase()

Which method would you use to find the position of a character in a string?

• substring()

• slice()

• indexOf()

• charAt()

What does the 'slice' method do when given a negative number?

• Throws an error

• Returns the entire string

• Starts slicing from the end

• Starts slicing from the beginning

How can you replace 'cat' with 'dog' in the string 'I have a cat'?

• string.replace('cat', 'dog')

• string.swap('cat', 'dog')

• string.change('cat', 'dog')

• string.modify('cat', 'dog')

What does the 'includes' method return?

• A boolean indicating if the substring is present

• The index of the substring

• The substring itself

• The length of the substring