Multiple choice java

Which one of the following identifiers is not a keyword?





    

      
    
            
  1. 
              
    null
    
    
            
    2. 
            
  2. 
              
    transient
    
    
            
    3. 
            
  3. 
              
    assert
    
    
            
    4. 
            
  4. 
              
    const
    
    
            
    5. 
      

    


    

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          AI explanation
          

          

              

                
In Java, 'null' is a reserved literal, not a keyword — it represents the null reference value but cannot be used as an identifier or in keyword-specific syntax the way true keywords are; technically it's classified separately in the Java Language Specification. 'transient', 'assert', and 'const' are all reserved words: transient and assert are actual keywords (assert added in Java 1.4), while const is reserved as a keyword even though it's unused (a leftover from C++ compatibility, to prevent it being used as an identifier). So null is the odd one out — a literal, not a keyword.




                
    
                    
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