Airbnb Interview Question for Software Engineers


Country: United States
Interview Type: In-Person




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2
of 2 vote

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public void backButton(String[] cmds) {
          Stack<String> forwardStack=new Stack();
          Stack<String> backwardStack=new Stack();
          String currentPage="about:blank";

          for(int i = 0; i < cmds.length; i++)
          {
               String cmd = cmds[i];
               if(cmd.equals("open"))
               {
                    backwardStack.push(currentPage);
                    currentPage=cmds[++i];
                    forwardStack = new Stack();
               }
               else if(cmd.equals("back"))
               {    
                        if(!backwardStack.isEmpty()){
                             forwardStack.push(currentPage);
                             currentPage=backwardStack.pop();
                        }
               }
               else if(cmd.equals("forward"))
               {
                        if(!forwardStack.isEmpty()){
                            backwardStack.push(currentPage);
                            currentPage=forwardStack.pop();
                        }
               }
          }
         return currentPage;
     }

- aonecoding May 23, 2018 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 vote

The function return type is void. Please change it to String.

- dt.tuhin07 October 23, 2020 | Flag Reply


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