CIS 2750 Questions and Correct Answers/ Latest Update / Already Graded

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CIS 2750 Questions and Correct Answers/
Latest Update / Already Graded
Web App Architecture

Ans: Parser builds data model for every file, sends thos e values
to web server, web server stores info from that data model in
DB server, Web UI requests info from web server, web server
either pulls that from DB or requests a data model from parser


Linux Tool Chain

Ans: sequence of software tools that convert src code to binary


GCC

Ans: GNU Compiler Collection


CPP

Ans: C Preprocessor
- interprets all # in .h .and .c files before compiler sees source
code


C Compiler



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Ans: compile src into assembly language (.i into .s)


[G]AS

Ans: Assembler
takes assembly code into object code (.s to .o)


LD

Ans: Linker
- stitches .o and referenced system libs into bin exe
- static libs are linked here (dynamic are at run time)


LD.SO

Ans: Loader
- tells OS to execute a program
- OS opens new program and copies segments into virtual
memory process


DLOPEN

Ans: Loader
- Program using dynamically linked libs loaded by ld.so when
program starts

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Macros in Makefiles

Ans: $(THING) = flags/files/commands


CC = gcc

Ans: select GCC compiler as front end


CPPFLAGS

Ans: -Iinclude_file_dir (absolute)
-I~/myproj/include (relative and takes all system and own)
-Dsymbol (#define but in cmd line)
-DNDEBUG (disable assertions)


CFLAGS

Ans: Compiler Flags
-g (save symbols for debugger)
-Wall -std=c11
-fpic
-c




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LDFLAGS

Ans: Linker Flags
-Llib_dir
-L~/myproj/lib
-llibrary
-lfoo


Static lib

Ans: linked at compile time, inflexible, contents copied into
exe


Dynamic lib

Ans: linked at run time
shared libs
flexible
default irl


Creating shared lib

Ans: gcc -c prog.c -o prog.o
gcc -shared -o libprog.so prog.o



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