What are the distinguishing characteristics of a relocatable object file? An executable object file? Why do operating systems typically zero-fill pages used for uninitialized data? List four tasks...

What are the distinguishing characteristics of a relocatable object file? An executable object file? Why do operating systems typically zero-fill pages used for uninitialized data? List four tasks commonly performed by an assembler. Summarize the comparative advantages of assembly language and object code as the output of a compiler.