Multiple choice unix

Which of the following files will displayed by this command cat ch





    

      
    
            
  1. 
              
    patch
    
    
            
    2. 
            
  2. 
              
    catch
    
    
            
    3. 
            
  3. 
              
    .ch
    
    
            
    4. 
            
  4. 
              
    All of the above
    
    
            
    5. 
      

    


    

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        D
        Correct answer
      

        

          Explanation
          

            
The wildcard * matches any string (including empty). cat ch matches 'patch' (ch at end), 'catch' (ch at start), and '.ch' (ch at start). Since all options match, 'All of the above' is correct.


          

        

    

  



          

      
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