Tips on Customizing DW Question & Answer

How to Hide DW Question Answer Admin Menus

function plt_hide_dw_question_answer_menus() {
	//Hide "Questions".
	remove_menu_page('edit.php?post_type=dwqa-question');
	//Hide "Questions → Questions".
	remove_submenu_page('edit.php?post_type=dwqa-question', 'edit.php?post_type=dwqa-question');
	//Hide "Questions → Add New Question".
	remove_submenu_page('edit.php?post_type=dwqa-question', 'post-new.php?post_type=dwqa-question');
	//Hide "Questions → Question Category".
	remove_submenu_page('edit.php?post_type=dwqa-question', 'edit-tags.php?taxonomy=dwqa-question_category&post_type=dwqa-question');
	//Hide "Questions → Question Tags".
	remove_submenu_page('edit.php?post_type=dwqa-question', 'edit-tags.php?taxonomy=dwqa-question_tag&post_type=dwqa-question');
	//Hide "Questions → Answers".
	remove_submenu_page('edit.php?post_type=dwqa-question', 'edit.php?post_type=dwqa-answer');
	//Hide "Questions → Settings".
	remove_submenu_page('edit.php?post_type=dwqa-question', 'dwqa-settings');
	//Hide "Questions → Extensions".
	remove_submenu_page('edit.php?post_type=dwqa-question', 'dwqa-extensions');
}

add_action('admin_menu', 'plt_hide_dw_question_answer_menus', 11);

Where do I put this code?

How to Hide DW Question Answer Meta Boxes

function plt_hide_dw_question_answer_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Question Meta Data" meta box.
	remove_meta_box('dwqa-post-status', $screen->id, 'side');
	//Hide the "Answers" meta box.
	remove_meta_box('dwqa-answers', $screen->id, 'advanced');
	//Hide the "Question ID" meta box.
	remove_meta_box('dwqa-answer-question-metabox', $screen->id, 'side');
}

add_action('add_meta_boxes', 'plt_hide_dw_question_answer_metaboxes', 20);