Operating System - Chapter 4

Which of the following files are created by a successful compilation?

• .c files

• .h files

• .o files

• None of the above

What's the purpose of a linker?

• To transform a file with C code to an object file

• To transform an header (.h) file to an object file

• To merge all object files and libraries of the project to build the executable

• To detect invalid links on a header file

A header (.h) file should hold...

• the definitions of structs and other datatypes

• the prototypes of the public functions

• the indication of global variables associated to the corresponding C file (extern G_...)

• All of the above

Which of the following command line stops the compilation with gcc compiler right after the preprocessor stage?

• gcc -c source.c

• gcc -o a.exe source.c

• gcc -S source.c

• gcc -E source.c

What's the difference between #include <file.h> and #include "file.h"?

• Include with <...> is for system files, with "..." for user's defined files

• Include with <...> is for user's defined files, with "..." for system files

• Include with "..." is for header files that have declarations of global variables

• None of the above

What's "#pragma once" used for?

• It's a preprocessor directive

• It's used to prevent multiple includes of the same header file (.h)

• It's a largely supported, but non-standard mechanism of the preprocessor to prevent includes of the same header file (.h)

• All of the above

For production code, calls to the assert macro should be disabled at compile time. How can this be done?

• gcc -E code.c -o code.exe

• gcc -DNDEBUG code.c -o code.exe

• gcc -S code.c -o code.exe

• None of the above

In C language, what's the purpose of the following code:

int B = (random() % 1000)+1;

• assign a random integer within the range [0,999] to variable B

• assign a random integer within the range [1,1000] to variable B

• the line is non-valid, since % cannot be used this way

• None of the above