SS2023: Exam 2023-06-30 (Handout)

Name

UNIX/Linux Concepts

(From FH/Moodle Quiz: Linux Basics)

Statement	True	False
In kernel space there exists the concept of a process
In user space there exists the concept of a process
Interrupts are generally serviced in user space
Interrupts are generally serviced in kernel space
Scheduling of processes is done by the kernel
Address spaces are implemented in user space
A process can own all memory in the system
The kernel is the owner of all memory in the system
All processes share a single address space
Each process in the system has its own address space
An address space is three-dimensional
A process is identified by its process ID
A process is identified by its pthread context number
Processes are arranged in a process hierarchy, starting at process 1
A process may have multiple parents
Every process has a parent process
Every process except process 1 has a parent process
A timeslice is the amount of time that a process can run until it is suspended in favor of other processes
Fair scheduling ensures that network resources are evenly shared
On a single-CPU machine, no process may enter an infinite loop - or else, the entire machine will come to a halt
Fair scheduling ensures that every process gets its fair share of CPU resources
The scheduler gives processes the illusion that each of them owns the CPU
A context switch happens when one process enters a blocking system call

Toolchain

(From FH/Moodle Quiz: Toolchain)

Statement	True	False
The compiler combines multiple object files together into one executable
The compiler turns a single source file into an object (.o) file
Object files are not executable
Object files are executable
The linker combines multiple object files together into one executable
The linker combines multiple object files together into a static library

C++

(From FH/Moodle Quiz: C++)

Statement	True	False
When an action is said to lead to undefined behavior, this means that the program will crash
When an action is said to lead to undefined behavior, this means that the program could crash
When an action is said to lead to undefined behavior, this means that the program will continue but will wreak havoc on its data
When an action is said to lead to undefined behavior, this means that the program could continue but could wreak havoc on its data
A variable declared const can only be initialized and never modified.
A variable of type int which is declared const is initialized to 0 if no initializer is given.
Class members cannot be declared const
const class member variables can be initialized in the constructor body
A method declared const promises to the compiler (and the caller) that a call to it does not modify the object it is called on
Declaring a class constructor const leads to undefined behavior
A reference variable can be left uninitialized
A caller that passes a variable to a function/method as a reference must take into account that the variable could be modified
A caller that passes a variable to a function/method as a const reference must take into account that the variable could be modified
A default constructor initializes an object when no initialization parameters are given
std::vector<> guarantees that it keeps elements in contiguous memory
In a std::vector<> instance that contains three elements, accessing index 3 (vec[3]) leads to undefined behavior
In a std::vector<> instance that contains three elements, accessing index 0 (vec[0]) leads to undefined behavior