SS2023: Exam 2023-06-30 (Solved)

Name

UNIX/Linux Concepts

(From Quiz: Linux Basics)

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

Toolchain

(From Quiz: Toolchain)

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

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