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With design questions, ask your interviewer in order to clarify, do not start writing code.
Of course, we will be using OOP model for that. But what kind of design pattern, should we implement : Singleton / Factory. It depends on the questions and it is not a bad idea to ask interviewer if he prefers this or that.
Who is going to use it? Any Special Cases -- Child, Adult, Older , Disable Type
What are the materials used?  -- Wood, Steel, Iron, Vintage
Where are the objects to be used for? Office, Home, Outside, --
What are the objects ? -- Couch, Chair, Bed, Tea table, Desk, ---
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public class differentObjects extends forWhom {
          string [ ] furnitures; //collection of different furnitures
    //different furniture items : chair, bed, desk --
    private int furnitureNumber ;
         //constructor getting number of furnitures
          public differentObjects(int numberOfFurniture) { 
                      furnitureNumber = numberOfFurniture; 
         }

      public void get_names () {
   string [] furnitures = new furnitures[furnitureNumber] 
     furnitures [0] = chair
     furnitures [0] = "chair";
     furnitures [1] = "bed";
     furnitures [2] = "desk";
  ....................................
  ..................................... 
               }
}
abstract class forWhom {
                 public for_home() {.........}
                 public for_office() {.........} 
                 public for_special() {.........} 
                 public for_child() {.........} 
                 public for_adult() {.........}
                 public for_old() {.........}
 }
//color of different furniture
 public class colors extends  differentObjects{
              public void colors_available() { ...}
              public void colors_out_of_stock () {..........}
              public void colors_custom_made () {..............}
} 
//materials made up of 
 public class materials extends differentObjects {
            public void is_steel() {...}
            public void is_iron() {...}
            publlic void is_wood() {......}
            public void is_vintage() {.............}
}
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