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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Is variable1 a valid variable name?
💡 Hint: Look at the first character.
Question 2
Easy
Is 123var a valid variable name?
💡 Hint: Recall the starting character rules.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What character can a variable name not start with?
- Number
- Letter
- Underscore
💡 Hint: Remember the starting rule for variables.
Question 2
Are variable names case-sensitive in JavaScript?
- True
- False
💡 Hint: Think of the name `myVar` versus `myvar`.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write a short JavaScript function that shows whether a given variable name is valid based on the naming rules. Provide an example of valid and invalid names.
💡 Hint: Consider the patterns for valid names with regular expressions.
Question 2
Create a list of 10 variable names, marking which ones are valid or invalid based on the rules discussed. Justify your choices.
💡 Hint: Evaluate each name based on starting rules and reserved keywords.
Challenge and get performance evaluation