ERC20 Token Quiz
    
    
        
        
            1. What is ERC20?
            
            
            
         
        
        
            2. What does the `totalSupply()` function do in an ERC20 token?
            
            
            
         
        
        
            3. Which of the following is NOT an ERC20 function?
            
            
            
         
        
        
            4. What is a token typically used for in a dApp?
            
            
            
         
        
        
            5. What is the purpose of the `transfer` function in ERC20?
            
            
            
         
        
        
            6. How does a dApp user interact with an ERC20 token?
            
            
            
         
        
        
            7. What is the role of the `approve` function in an ERC20 token?
            
            
            
         
        
        
            8. How can a spender transfer tokens on behalf of the token owner?
            
            
            
         
        
        
            9. What is a "gas fee" in the context of dApps?
            
            
            
         
        
        
            10. What does the `balanceOf` function in an ERC20 token do?