Beamer example 1

\documentclass[hyperref={pdfpagelabels=false}]{beamer}
% By  using hyperref={pdfpagelabels=false} you get rid off:
% Package hyperref Warning: Option `pdfpagelabels' is turned off
% (hyperref)                because \thepage is undefined. 
% Hyperref stopped early 
%

\usepackage{lmodern}
% Using lmondern and you get rid off this:
% LaTeX Font Warning: Font shape `OT1/cmss/m/n' in size <4> not available
% (Font)              size <5> substituted on input line 22.
% LaTeX Font Warning: Size substitutions with differences
% (Font)              up to 1.0pt have occurred.
%

% If \title{…} \author{…} come after \begin{document} 
% you get the following warnig:
% Package hyperref Warning: Option `pdfauthor' has already been used,
% (hyperref) ... 
% So it is here before \begin{document}



\title{Simple Beamer Class}   
\author{Sascha Frank} 
\date{\today} 

\begin{document}

\begin{frame}
\titlepage
\end{frame} 

\begin{frame}
\frametitle{Table of contents}
\tableofcontents
\end{frame}
 


\section{Section no.1} 
\begin{frame}
\frametitle{frame title} 
Each frame should have a title.
\end{frame}

\subsection{Subsection no.1.1  }
\begin{frame}
Without title somethink is missing. 
\end{frame}


\section{Section no. 2} 
\subsection{Lists I}
\begin{frame}
\frametitle{unnumbered lists}
\begin{itemize}
\item keyword
\item still another keyword
\end{itemize} 
\end{frame}

\begin{frame}
\frametitle{lists with single pause}
\begin{itemize}
\item keyword \pause 
\item still another keyword
\end{itemize} 
\end{frame}

\subsection{Lists II}
\begin{frame}
\frametitle{numbered lists}
\begin{enumerate}
\item keyword
\item still another keyword
\end{enumerate}
\end{frame}

\begin{frame}
\frametitle{numbered lists with single pause}
\begin{enumerate}
\item keyword  \pause 
\item still another keyword
\end{enumerate}
\end{frame}

\section{Section no.3} 
\subsection{Tables}
\begin{frame}
\frametitle{Tables}
\begin{tabular}{|l|c|r|p{1.5 cm }|}
\hline
left & centers & right & width \\
l & C & r & p \\
\hline
\end{tabular}
\end{frame}


\begin{frame}
\frametitle{Tables with pause}
\begin{tabular}{c c c}
A & B & C \\ 
\pause 
1 & 2 & 3 \\  
\pause 
A & B & C \\ 
\end{tabular} 
\end{frame}


\section{Section no. 4}
\subsection{blocs}
\begin{frame}
\frametitle{blocs}

\begin{block}{title of the bloc}
bloc text
\end{block}

\begin{exampleblock}{title of the bloc}
bloc text
\end{exampleblock}


\begin{alertblock}{title of the bloc}
bloc text
\end{alertblock}
\end{frame}
\end{document}