11.A user opens an existing file for editing by issuing the 'vi my_file' command and moves the cursor to the 70th line. The editor is not in INSERT mode. Which of the following statements correctly...

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Extracted text: 11.A user opens an existing file for editing by issuing the 'vi my_file' command and moves the cursor to the 70th line. The editor is not in INSERT mode. Which of the following statements correctly describe the results of executing a?'a.*d$?-1 command? O It will search backwards (from the curent cursor position) for a word that begins with 'a' and ends with 'd'. O If the search is successful the cusor will move to the line before the line containing the search string. O It will search backwards (from the line above the current line) for a word that begins with 'a' and ends with 'd'. O It will search backwards (from the line above the current line) for a line that begins with 'a' and ends with 'd'. O If the search is successful the cursor will move to the line containing the search string 12.A user opens an existing file for writing by issuing the 'vi my_file' command and has not performed any editing actions. Which of the following statements are correct? O The :1,2w my_old_file command will always save the first two lines in file my_old_file O The w $.zz command will attempt to copy to file my_file to file my_file.zz . O The :e# command will cause the editor to reread the file. O The zz command will cause the editor to be excited. O the :ws command will share the file currently being edited 15. Which of the following statements are correct regarding std:weak ptr in C++ O Each instance does not increase the reference count of the pointer object being shared. O The object being referenced by the std:weak_ptr instance must be checked to see if it still exists before it can be accessed. O Access to an instance's contained pointer is via operator->0. O An instance can transfer ownership of its contained pointer if assigned to an object of std::unique_ptr. O E. An instance must be initialized by either an object of std::shared_ptr or another std::weak_ptr.