Os2 - II Odbrana

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    Novi nod za uređaje kreiraćete komandom:

    • Create
    • Mknod
    • Crtnd
    • Ne znam
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OS2 - II odbrana.

Os2 - II Odbrana - Quiz

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  • 2. 

    Komande df i du služe za proveru slobodnog i zauzetog prostora fajl sistema.

    • Netačno 

    • Uslovno

    • Tačno 

    • Ne znam

    Correct Answer
    A. Tačno 
    Explanation
    The given statement is true. The command "df" is used to check the free and used space of a file system. By running this command, users can see the amount of disk space used and available on their system. It provides information about the total size of the file system, the amount of space used, the amount of free space, and the percentage of space used. Therefore, the statement "tačno" (true) is the correct answer.

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  • 3. 

    Kojom komandom kreiramo novi ext2 fajl sistem na particiji /dev/sdb1?

    • Create ext2 /dev/sdb1

    • Ne znam

    • Ext2 /dev/sdb1

    • Mkfs -t ext2 /dev/sdb1

    Correct Answer
    A. Mkfs -t ext2 /dev/sdb1
    Explanation
    The command "mkfs -t ext2 /dev/sdb1" is used to create a new ext2 file system on the partition /dev/sdb1. The "mkfs" command is used to create a file system, "-t ext2" specifies the file system type as ext2, and "/dev/sdb1" is the partition on which the file system will be created. This command formats the partition and sets it up to be used as an ext2 file system.

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  • 4. 

    U sledećem delu programskog koda
    • segment_id = shmget (IPC_PRIVATE, shared_segment_size,
    • IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR);
    dodelili smo sledeća prava vlasniku deljivog memorijskog segmenta:

    • Samo čitanje

    • Samo pisanje

    • Čitanje i pisanje

    • Ne znam

    Correct Answer
    A. Čitanje i pisanje
    Explanation
    The given code is using the shmget function to create a shared memory segment. The flags IPC_CREAT and IPC_EXCL are used to create a new segment if it does not already exist. The flags S_IRUSR and S_IWUSR are used to set the permissions for the owner of the segment, allowing both reading and writing. Therefore, the correct answer is "Čitanje i pisanje".

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  • 5. 

    Razlika između FIFO i Pipe datoteka je:

    • Nema razlike

    • Ne znam 

    • FIFO nema ima ime u sistemu datoteka a Pipe je imenovana datoteka

    • FIFO ima ime u sistemu datoteka a Pipe je neimenovana datoteka

    Correct Answer
    A. FIFO ima ime u sistemu datoteka a Pipe je neimenovana datoteka
    Explanation
    The correct answer states that FIFO has a name in the file system, while Pipe is an unnamed file. This means that FIFO can be accessed and manipulated using its name in the file system, whereas Pipe does not have a specific name and is typically used for communication between processes within the same system.

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  • 6. 

    Sistemski pozivi popoen i pclose se koriste za rad sa:

    • Pipe strukturama

    • Fajl sistemima

    • Blokovima

    • Ne znam

    Correct Answer
    A. Pipe strukturama
    Explanation
    The correct answer is "Pipe strukturama" (Pipe structures). The system calls popen and pclose are used for working with pipe structures. Pipes are a form of inter-process communication that allows the output of one process to be used as the input for another process. The popen function opens a pipe and creates a new process to execute a command, while the pclose function closes the pipe and waits for the associated process to terminate. These system calls are commonly used for tasks such as redirecting input/output between processes or creating a pipeline of processes.

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  • 7. 

    Koja je prednost ext3 fajl sistema u odnosu na ext2?

    • Ext2 fajl sistem je bolji u odnosu na ext3

    • Ext3 podržava dnevnik (journaling)

    • Ne znam

    • Ext3 podržava straničenje (paging)

    Correct Answer
    A. Ext3 podržava dnevnik (journaling)
    Explanation
    The correct answer is ext3 podržava dnevnik (journaling). Ext3 file system has the advantage of supporting journaling, which means that it keeps a log of changes before they are actually made to the file system. This helps in recovering the file system in case of a system crash or power failure, as it can replay the journal and restore the file system to a consistent state. This feature enhances data integrity and reduces the risk of data loss.

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  • 8. 

    Šta se postiže sledećom komandom:
    • find / -nouser -o -nogroup

    • Prikazivanje svih datoteka koje imaju vlasnika i grupe na fajl sistemu

    • Prikazivanje svih datoteka fajl sistemu

    • Ne znam 

    • Prikazivanje svih datoteka bez vlasnika i grupe na fajl sistemu

    Correct Answer
    A. Prikazivanje svih datoteka bez vlasnika i grupe na fajl sistemu
    Explanation
    The given command "find / -nouser -o -nogroup" is used to display all files on the file system that do not have an owner or a group assigned to them.

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  • 9. 

    Pretvaranje ext2 fajl sistema u ext3 je moguće bez gubitka podataka.

    • Netačno

    • Uslovno

    • Ne znam

    • Tačno

    Correct Answer
    A. Tačno
    Explanation
    The statement "Pretvaranje ext2 fajl sistema u ext3 je moguće bez gubitka podataka" translates to "Converting an ext2 file system to ext3 is possible without data loss." The correct answer "Tačno" means "True." Therefore, the explanation is that it is indeed possible to convert an ext2 file system to ext3 without losing any data.

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  • 10. 

    Uređaji povratne petlje (loopback) u Linuksu /dev/loop0, /dev/loop1, … služe za simuliranje nekog blok uređaja koristeći datoteku - sliku - sa sadržajem (disk image).

    • Uslovno

    • Tačno

    • Netačno

    • Ne znam

    Correct Answer
    A. Tačno
    Explanation
    The given answer "Tačno" (True) is correct because it accurately states that the loopback devices in Linux, such as /dev/loop0, /dev/loop1, etc., are used to simulate a block device by using a file or disk image as its content. This allows users to access and manipulate the contents of the file as if it were a physical device.

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  • 11. 

    Šta se dešava kada korisnik sa root privilegijama izvrši sledeću komandu:
    • rm -rf /

    • Započinje se brisanje celokupnog korenog stabla Linux sistema datoteka sa svim poddirektorijumima

    • Započinje se brisanje celokupnog korenog stabla Linux sistema datoteka sa bez poddirektorijumima

    • Ne znam 

    • Komanda nije ispravno uneta

    Correct Answer
    A. Započinje se brisanje celokupnog korenog stabla Linux sistema datoteka sa svim poddirektorijumima
    Explanation
    The given command "rm -rf /" is used to remove files and directories recursively and forcefully. In this case, it is being executed with root privileges. The option "-r" indicates that the removal should be done recursively, and the option "-f" indicates that it should be done forcefully without prompting for confirmation. The argument "/" specifies the root directory. Therefore, the command will start deleting the entire root directory of the Linux system, including all its subdirectories.

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  • 12. 

    Šta predstavlja /dev/hda na Linux operarivnom sistemu?

    • Čvor (node) preko koga pristupamo disku “IDE Primary Master”

    • Direktorijum na kome se nalaze diskovi

    • Čvor (node) preko koga pristupamo disku “IDE Secondary Master”

    • Ne znam 

    Correct Answer
    A. Čvor (node) preko koga pristupamo disku “IDE Primary Master”
    Explanation
    The correct answer is "Čvor (node) preko koga pristupamo disku 'IDE Primary Master'". This answer correctly identifies that the given symbol represents the node through which we access the "IDE Primary Master" disk on a Linux operating system.

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  • 13. 

    Postoji sledeća linija u datoteci:
    • /etc/fstab: /dev/sdb1 /proba ext3 defaults 0 2
    da li je potrebno nešto izmeniti da bi obični korisnici mogli da montiraju (mount) fajlsistem /dev/sdb1?

    • Potrbno je dodati ,mount posle defaults

    • Nije potrebno ništa izmeniti

    • Potrbno je dodati ,user posle defaults

    • Ne znam

    Correct Answer
    A. Potrbno je dodati ,user posle defaults
    Explanation
    To allow regular users to mount the /dev/sdb1 filesystem, it is necessary to add ",user" after "defaults" in the given line in the /etc/fstab file.

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  • 14. 

    Prilikom upotrebe neimenovane “pipe” datoteke, koja je ispravna sintaksa i redosled pozivanja da bi ulaz za programA bio izlaz iz programB?

    • ProgramB | programA

    • ProgramA | programB

    • Oba 

    • Ne znam

    Correct Answer
    A. ProgramB | programA
    Explanation
    The correct answer is "programB | programA". This is the correct syntax and order of calling in order for the input for programA to be the output of programB. The "|" symbol represents the pipe operator, which allows the output of one program to be used as the input of another program. In this case, programB's output is being piped into programA as its input.

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  • 15. 

    Šta je na Linuksu direktorijum /proc/self?

    • To je specijalni direktorijum u kome se pojavljuje sadržaj u zavisnosti od procesa koji pristupa, i ne odgovara PID tog procesa u /proc/ direktorijumu

    • Ne znam 

    • To je specijalni direktorijum u kome se pojavljuje sadržaj u zavisnosti od procesa koji pristupa, i odgovara PID tog procesa u /proc/ direktorijumu

    Correct Answer
    A. To je specijalni direktorijum u kome se pojavljuje sadržaj u zavisnosti od procesa koji pristupa, i odgovara PID tog procesa u /proc/ direktorijumu
    Explanation
    The correct answer is: To je specijalni direktorijum u kome se pojavljuje sadržaj u zavisnosti od procesa koji pristupa, i odgovara PID tog procesa u /proc/ direktorijumu.

    The /proc/self directory in Linux is a special directory that contains information about the current process. It dynamically shows the content based on the process that accesses it and corresponds to the process ID (PID) of that process in the /proc/ directory. Therefore, the correct answer explains the purpose and functionality of the /proc/self directory accurately.

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  • 16. 

    Koja od ponuđenih komandi za aktiviranje mrežnog sistema datoteka ima ispravnu sintaksu?

    • Mount -t nfs fileserver2://share/doc /doc

    • Mount nfs fileserver1://share/doc /doc

    • Mount -t nfs fileserver1://share/doc /doc

    • Ne znam 

    Correct Answer
    A. Mount -t nfs fileserver1://share/doc /doc
    Explanation
    The correct answer is "mount -t nfs fileserver1://share/doc /doc". This command uses the correct syntax for activating a network file system. It specifies the file system type (-t nfs) and the location of the file server (fileserver1://share/doc). It also specifies the mount point (/doc) where the file system will be mounted.

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  • 17. 

    Algoritam wakeup je tesno povezan sa:

    • Tajmerom

    • časovnikom

    • Mehanizmom prekida

    • Ne znam 

    Correct Answer
    A. Mehanizmom prekida
    Explanation
    The correct answer is "mechanism of interruption". The wakeup algorithm is closely related to the mechanism of interruption. When a device or process needs attention or needs to be activated, it sends an interrupt signal to the system, which triggers the wakeup algorithm. This algorithm determines the appropriate action to take in response to the interrupt and ensures that the necessary resources are allocated to handle the interrupt effectively.

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  • 18. 

    Program fdisk služi za:

    • Upravljanje hard diskova 

    • Upravljanje particijama hard diskova - kreiranje, brisanje i sl.

    • Upravljanje fajl sistemima

    • Ne znam

    Correct Answer
    A. Upravljanje particijama hard diskova - kreiranje, brisanje i sl.
    Explanation
    The correct answer is "Upravljanje particijama hard diskova - kreiranje, brisanje i sl." This is because the program fdisk is used for managing partitions on a hard disk, including creating and deleting partitions, as well as performing other related tasks. It is not used for managing the entire hard disk or file systems, but specifically for partition management.

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  • 19. 

    Pri korišćenju sistemskog poziva :
    • pipe(fds)
    parametar fds predstavlja:

    • Celobrojni niz od dva člana u koji se smeštaju deskriptori datoteka samo za pisanje

    • Celobrojni niz od dva člana u koji se smeštaju deskriptori datoteka samo za čitanje

    • Celobrojni niz od dva člana u koji se smeštaju deskriptori datoteka za čitanje i pisanje

    • Ne znam

    Correct Answer
    A. Celobrojni niz od dva člana u koji se smeštaju deskriptori datoteka za čitanje i pisanje
    Explanation
    The correct answer is "Celobrojni niz od dva člana u koji se smeštaju deskriptori datoteka za čitanje i pisanje." This means that the parameter 'fds' represents an integer array of two members where file descriptors for both reading and writing are stored.

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  • 20. 

    Sledeći deo koda se koristi za:
    • int fd =open (fifo_path, O_WRONLY); 
    • write (fd, data, data_length);
    • close (fd);

    • Upis bafera podataka u RR

    • Ne znam 

    • Čitanje bafera podataka u FIFO

    • Upis bafera podataka u FIFO

    Correct Answer
    A. Upis bafera podataka u FIFO
    Explanation
    The given code opens a file descriptor using the "open" function, specifying the path to a FIFO (named pipe) file and the flag O_WRONLY, indicating that the file will be opened for writing only. Then, it writes the contents of the data buffer to the FIFO using the "write" function and the file descriptor. Finally, it closes the file descriptor using the "close" function. Therefore, the correct answer is "Upis bafera podataka u FIFO", which translates to "Writing data buffer to FIFO" in English.

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  • 21. 

    Šta postižemo sledećom komandom u Linuxu:
    • mount /dev/hdb1 /home

    • Montiramo IDE uređaj predstavljen čvorom /dev/hdb1 u svoj lični direktorijum 

    • Montiramo PDE uređaj predstavljen čvorom /dev/hdb1 u direktorijum /home

    • Montiramo IDE uređaj predstavljen čvorom /dev/hdb1 u direktorijum /home

    • Ne znam

    Correct Answer
    A. Montiramo IDE uređaj predstavljen čvorom /dev/hdb1 u direktorijum /home
    Explanation
    The given command "mount /dev/hdb1 /home" is used to mount an IDE device represented by the node /dev/hdb1 into the directory /home. This means that the contents of the IDE device will be accessible and usable in the /home directory.

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  • 22. 

    Koje komande unosimo za kreiranje i aktivaciju swap particije na /dev/sda2?

    • Swapon /dev/sda2

    • Swap /dev/sda2

    • Mkswap /dev/sda2

    • Ne znam

    Correct Answer
    A. Mkswap /dev/sda2
    Explanation
    The correct answer is "mkswap /dev/sda2". This command is used to create a swap partition on the /dev/sda2 device. The "swapon /dev/sda2" command is used to activate the swap partition, while the "swap /dev/sda2" command is not a valid command.

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  • 23. 

    Šta se dešava prilikom korišćenja neimenovane “pipe” datoteke ukoliko proces čitalac pokuša da pročita a ne postoje raspoloživi podaci?

    • Ne može da se koristi neimenovana pipe datoteka

    • Proces čitalac se blokira dok se ne pojave podaci i time se postiže automatska sinhronizacija

    • Ne znam 

    • Proces čitalac se ne blokira dok se ne pojave podaci i time se postiže automatska sinhronizacija

    Correct Answer
    A. Proces čitalac se blokira dok se ne pojave podaci i time se postiže automatska sinhronizacija
    Explanation
    When using an unnamed "pipe" file, if the reader process tries to read but there is no available data, it will be blocked until data appears. This allows for automatic synchronization between the reader and writer processes.

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  • 24. 

    Šta se nalazi u direktorijumu /dev/pts na Linuksu?

    • Ne znam 

    • Tu je montiran specijalni sistem datoteka u kome se statički kreiraju nodovi koji odgovaraju pokrenutim kvazi-terminalima

    • Tu je montiran specijalni sistem datoteka u kome se dinamički kreiraju nodovi koji odgovaraju pokrenutim kvazi-terminalima

    Correct Answer
    A. Tu je montiran specijalni sistem datoteka u kome se dinamički kreiraju nodovi koji odgovaraju pokrenutim kvazi-terminalima
    Explanation
    The correct answer is "Tu je montiran specijalni sistem datoteka u kome se dinamički kreiraju nodovi koji odgovaraju pokrenutim kvazi-terminalima." This means that the special file system /dev/pts on Linux dynamically creates nodes that correspond to running pseudo-terminals. This allows multiple terminal sessions to be created and managed simultaneously.

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  • 25. 

    Kojom komandom ćete najlakše utvrditi IP adresu vašeg mrežnog adaptera?

    • Ipconfig

    • Netstat

    • Ifconfig

    • Ne znam

    Correct Answer
    A. Ifconfig
    Explanation
    The correct answer is "ifconfig". By using the "ifconfig" command, you can easily determine the IP address of your network adapter.

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  • 26. 

    Koji faktor koristi sistemski generator slučajnih brojeva u Linuksu kao “spoljšnji” izvor?

    • Ponašanje korisnika

    • Ponašanje cpu-a

    • Zvuk

    • Ne znam

    Correct Answer
    A. Ponašanje korisnika
    Explanation
    The correct answer is "Ponašanje korisnika." In Linux, the system random number generator uses various factors as "external" sources to generate random numbers. One of these factors is the behavior of the user. The user's actions, such as mouse movements and keyboard inputs, are used as input to generate random numbers. This helps to ensure that the generated numbers are unpredictable and suitable for cryptographic purposes.

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  • 27. 

    Dnevnička datoteka (log file) koju generiše syslog je obično propširna za ručni pregled od strane administratora. Koji programi služe za lakši pregled i slanje obaveštenja o određenim događajima?

    • Swatch

    • Aptitude

    • Ne znam

    • Logcheck

    Correct Answer
    A. Logcheck
    Explanation
    Logcheck is a program that is used for easier review and notification of specific events in log files generated by syslog. It helps administrators to efficiently monitor and manage log files by automatically scanning them for predefined patterns or keywords and sending notifications or alerts when those patterns are found. This allows administrators to stay informed about important events and take necessary actions promptly.

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  • 28. 

    Sledeći deo koda se koristi za:
    • FILE*fifo = fopen (fifo_path, “r”);
    • fscanf (fifo, %s, buffer);
    • fclose (fifo);

    • Čitanje podataka iz FIFO datoteke

    • Upis bafera podataka u FIFO

    • Upis podataka iz FIFO datoteke

    • Čitanje podataka iz RR datoteke

    Correct Answer
    A. Čitanje podataka iz FIFO datoteke
    Explanation
    The given code is used for reading data from a FIFO file. It opens the FIFO file using the "r" mode, reads a string from the file using fscanf, and then closes the file. Therefore, the correct answer is "Čitanje podataka iz FIFO datoteke" which translates to "Reading data from a FIFO file" in English.

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  • 29. 

    Pri upotrebi shmget:
    • int segment_id = shmget (key, getpagesize(), shmflg);
    getpagesize() predstavlja:

    • Funkciju koja  vraća trenutnu sistemsku veličinu deljive memorije

    • Funkciju koja šalje trenutnu sistemsku veličinu stranice (page size)

    • Funkciju koja vraća trenutnu sistemsku veličinu stranice (page size)

    • Ne znam

    Correct Answer
    A. Funkciju koja vraća trenutnu sistemsku veličinu stranice (page size)
    Explanation
    The correct answer is "Funkciju koja vraća trenutnu sistemsku veličinu stranice (page size)". In this context, getpagesize() is a function that returns the current system page size. This page size is used as the size parameter in the shmget() function to allocate a shared memory segment.

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  • 30. 

    Čemu služi poziv shmget()?

    • Za alokaciju ne deljivog memorijskog segmenta

    • Za alokaciju memorijskog segmenta

    • Ne znam

    • Za alokaciju deljivog memorijskog segmenta

    Correct Answer
    A. Za alokaciju deljivog memorijskog segmenta
    Explanation
    Poziv shmget() služi za alokaciju deljivog memorijskog segmenta.

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  • 31. 

    U navedenom delu programskog koda:
    • file_memory = mmap
    • (0,FILE_LENGTH,PROT_WRITE,MAP_SHARED,fd,0);
    radimo sledeće:

    • Kreiramo mapiranu datoteku sa pravom za upis u fajl deskriptor sa ofsetom nula

    • Kreiramo memorijski mapiranu datoteku sa pravom za upis u fajl deskriptor sa ofsetom nula

    • Kreiramo memorijski mapiranu datoteku sa pravom za upis u fajl deskriptor sa ofsetom jedan

    • Ne znam

    Correct Answer
    A. Kreiramo memorijski mapiranu datoteku sa pravom za upis u fajl deskriptor sa ofsetom nula
    Explanation
    In the given code, the function mmap is used to create a memory-mapped file with write permission for the file descriptor and an offset of zero. This means that a portion of the file is mapped into memory, allowing direct read and write operations to the file. The offset of zero indicates that the mapping starts from the beginning of the file. Therefore, the correct answer is "Kreiramo memorijski mapiranu datoteku sa pravom za upis u fajl deskriptor sa ofsetom nula" (We create a memory-mapped file with write permission for the file descriptor and an offset of zero).

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  • 32. 

    Za uspešno montiranje (mount) postojeće slike diska (disk image) /tmp/image u direktorijumu /mnt/vdrv koristeći uređaj povratne petlje (loopback) potrebno je da unesemo sledeće komande:

    • Mount loop=/dev/loop0 /tmp/image /mnt/vdrv

    • Mount -o loop=/dev/loop0 /tmp/image 

    • Mount -o loop=/dev/loop0 /tmp/image /mnt/vdrv

    • Mount -o loop=/dev/loop0 /tmp /mnt/vdrv

    Correct Answer
    A. Mount -o loop=/dev/loop0 /tmp/image /mnt/vdrv
    Explanation
    The correct answer is "mount -o loop=/dev/loop0 /tmp/image /mnt/vdrv". This command uses the "-o" option to specify that the loop device is "/dev/loop0", the disk image is located at "/tmp/image", and the mount point is "/mnt/vdrv". This command correctly mounts the disk image using the loopback device.

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  • 33. 

    Šta omogućava program sudo na Linuksu?

    • Izvršavanje programa bez privilegija drugih korisnika sa njihovim šiframa

    • Taj program ne postoji na Linuksu

    • Izvršavanje programa sa privilegijama drugih korisnika bez njihove šifre

    • Ne znam

    Correct Answer
    A. Izvršavanje programa sa privilegijama drugih korisnika bez njihove šifre
    Explanation
    The correct answer is "Izvršavanje programa sa privilegijama drugih korisnika bez njihove šifre" which translates to "Executing programs with the privileges of other users without their password". This refers to the "sudo" command in Linux, which allows a user to run commands with the security privileges of another user, typically the root user, without needing to know their password.

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  • 34. 

    Sistemski poziv dup2 koristi se za:

    • Preusmeravanje ulaza i izlaza

    • Dupliciranje datoteka 

    • Ne znam

    • Preusmeravanje ulaza

    Correct Answer
    A. Preusmeravanje ulaza i izlaza
    Explanation
    The correct answer is "preusmeravanje ulaza i izlaza". The dup2 system call in programming is used to duplicate a file descriptor, allowing the input and output to be redirected from one file to another. This means that the input and output can be redirected to a different file or device, providing flexibility in handling data streams.

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  • 35. 

    Na Linuksu se jezgro koje se koristi prilikom podizanja operativnog sistemačuva u direktorijumu /boot. Nakoji način se može povećati sigurnost jezgra?

    • Ostaviti ga na istoj particiji i podesiti da je ona samo za čitanje (read only) u /etc/fstab

    • Prebaciti ga na drugu particiju i podesiti da je ona samo za čitanje (read only) u /etc/fstab

    • Ne znam

    • Prebaciti ga na drugu particiju i podesiti da je ona samo za pisanje (write only) u /etc/fstab

    Correct Answer
    A. Prebaciti ga na drugu particiju i podesiti da je ona samo za čitanje (read only) u /etc/fstab
    Explanation
    By moving the kernel to a separate partition and setting it to read-only in the /etc/fstab file, the security of the kernel can be increased. This prevents any unauthorized modifications to the kernel, as it can only be accessed in a read-only mode. This helps to protect the integrity of the kernel and reduce the risk of malicious attacks or unauthorized changes to the operating system.

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  • 36. 

    Za koreni fajl sistem Root FS (/) važi sledeće:

    • Sadrži sistemske podatke i njegova struktura je strogo određena

    • U toku rada se ne može deaktivirati (umount)

    • Prvi se aktivira prilikom podizanja operativnog sistema

    • Ne znam 

    Correct Answer
    A. Prvi se aktivira prilikom podizanja operativnog sistema
    Explanation
    The correct answer states that the root file system (/) is activated first during the booting process of the operating system. This means that it is the initial file system that is accessed and loaded by the operating system during startup. Other file systems may be mounted later, but the root file system is essential for the functioning of the operating system.

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  • 37. 

    Uređaj /dev/cdrom je montiran u direktorijum /media/cdrom Koje od sledećih komandi služe za deaktivaciju tog uređaja?

    • Umount /cdrom

    • Umount /dev/cdrom

    • Umount /media/cdrom

    • Ne znam

    Correct Answer
    A. Umount /dev/cdrom
    Explanation
    The correct answer is "umount /dev/cdrom". This command is used to unmount a device, in this case, the /dev/cdrom device. The "umount" command is followed by the device's path (/dev/cdrom) to specify which device should be unmounted. By executing this command, the device will be deactivated and can be safely removed from the system.

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  • 38. 

    Korisnik root zadaje sledeće dve komande:
    • dd if=/dev/zero of=/swap_file count =100M bs=512
    • mkswap /swap_file
    Za koliko se povećava ukupan swap prostor na sistemu?

    • 512 MB

    • Ne povećava se

    • 100 MB

    • Ne znam 

    Correct Answer
    A. Ne povećava se
    Explanation
    The given commands are used to create a swap file and initialize it as swap space on the system. However, the size of the swap file is not specified in the commands, so it will not increase the total swap space on the system. Therefore, the correct answer is "Ne povećava se" (It does not increase).

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  • 39. 

    Šta se dešava kada u Linuksu pokrnemo komandu ifconfig bez dodatnih parametara?

    • Dobijamo prikaz i status svih aktivnih mrežnih interfejsa

    • Dobijamo prikaz i status određenih aktivnih mrežnih interfejsa

    • Dobijamo prikaz svih aktivnih mrežnih interfejsa

    • Ne znam

    Correct Answer
    A. Dobijamo prikaz i status svih aktivnih mrežnih interfejsa
    Explanation
    When we run the "ifconfig" command in Linux without any additional parameters, it displays the information and status of all active network interfaces. This allows us to see the details of each interface, such as IP addresses, MAC addresses, and network settings.

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  • 40. 

    Za koju konfiguracionu datoteku je karakterističan sledeći sadržaj:
    • search mydomain.co.yu
    • nameserver 172.16.48.1

    • /etc/services

    • /etc/resolve.conf

    • /etc/hosts

    • /etc/network/interfaces

    Correct Answer
    A. /etc/resolve.conf
    Explanation
    The given content is typically found in the /etc/resolve.conf file. This file is used by the DNS resolver to map hostnames to IP addresses. It specifies the nameserver(s) that should be used for DNS resolution. In this case, the nameserver 172.16.48.1 is specified, indicating that DNS queries should be sent to this IP address for resolution.

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  • 41. 

    Šta je tačno za blok uređaje u Linuxu?

    • Obezbeđuju slučajan (proizvoljan) pristup skladištenim podacima

    • Obezbeđuju čitanje ili upis u podataka u blokovima fiksne veličine

    • Obezbeđuju čitanje ili upis i pristup

    • Ne znam 

    Correct Answer
    A. Obezbeđuju čitanje ili upis u podataka u blokovima fiksne veličine
    Explanation
    The correct answer is that block devices in Linux provide reading or writing of data in fixed-size blocks. Block devices are a type of storage device that allows data to be accessed in blocks rather than individual bytes. These blocks have a fixed size, which allows for efficient reading and writing operations. Block devices include devices such as hard drives and solid-state drives.

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  • 42. 

    Čemu služi sistemski poziv ioctl?

    • Pomoću ovog poziva se može upravljati uređajima na Linuksu

    • Pomoću ovog poziva se može upravljati diskovima na Linuksu

    • Pomoću ovog poziva se može upravljati fajlovima na Linuksu

    • Ne znam

    Correct Answer
    A. Pomoću ovog poziva se može upravljati uređajima na Linuksu
    Explanation
    The ioctl system call in Linux is used to control devices. It allows a user program to communicate with a device driver and perform various operations on the device, such as configuring settings, retrieving information, or controlling its behavior. This system call is commonly used for managing and manipulating devices in the Linux operating system.

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  • 43. 

    Šta se podešava u datoteci /etc/exports na Linuksu?

    • Tabela eksportovanih datoteka

    • Parametri mrežnog sistema datoteka (NFS)

    • Parametri fajl sistema datoteka (FFS)

    • Ne znam

    Correct Answer
    A. Parametri mrežnog sistema datoteka (NFS)
    Explanation
    The correct answer is "Parametri mrežnog sistema datoteka (NFS)". This is because the question is asking about what can be configured in the /etc/exports file on Linux. The /etc/exports file is used to define the directories and options that are available for remote NFS clients to access. Therefore, the correct answer is the one that mentions "Parametri mrežnog sistema datoteka (NFS)", as it is the only option related to NFS, which is the network file system used for sharing files and directories between systems.

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  • 44. 

    Jedini način da običan korisnik izvrši program sa ROOT privilegijama na Linuksu je da zna šifru root-a

    • Tačno

    • Netačno

    • Uslovno

    • Ne znam

    Correct Answer
    A. Netačno
    Explanation
    The given statement is incorrect. The only way for an ordinary user to execute a program with root privileges on Linux is not just by knowing the root password. There are other methods such as using the "sudo" command or modifying the user's permissions through the "sudoers" file. Therefore, the correct answer is "Netačno" (False).

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  • 45. 

    Program badblocks služi za:

    • Proveru ispravnosti fajl sistema

    • Proveru ispravnosti blokova

    • Ne znam 

    • Proveru fizičke ispravnosti površine hard diska

    Correct Answer
    A. Proveru fizičke ispravnosti površine hard diska
    Explanation
    The correct answer is "Proveru fizičke ispravnosti površine hard diska" which translates to "Checking the physical integrity of the hard disk surface". The program badblocks is used to scan and detect any bad sectors or blocks on a hard disk. It helps to identify any physical damage or errors on the hard disk's surface, allowing users to take appropriate actions such as repairing or replacing the disk.

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  • 46. 

    Koje sve komande se mogu koristiti za ispisivanje tabele rutiranja u Linuksu?

    • Route

    • Netstat -r

    • Rttable

    • Ne znam 

    Correct Answer
    A. Route
    Explanation
    The correct answer is "route". In Linux, the "route" command is used to display or manipulate the IP routing table. It allows users to view the current routing table, add or delete routes, and modify routing parameters. The "netstat -r" command can also be used to display the routing table, providing information about the network connections and routing information. However, "rttable" and "ne znam" are not valid commands for displaying the routing table in Linux.

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  • 47. 

    Rezultat izvršenja komande mount na jednom Linux sistemu je:
    • /dev/hda1 on / type ext2 (rw)
    • /dev/hda2 on /home type ext2 (rw)
    • /dev/hda3 on /win type ntfs (ro)
    • /dev/hda4 on /tmp type ext2 (rw)
    • none on /proc type proc (rw).
    Korisnik root zadaje sledeće komande: umount /home, umount /win, umount /tmp Korisnik root:

    • Ne može da izvrši sve komande

    • Može da samo komande umount /home, umount /win

    • Može da izvrši sve komande

    • Ne znam

    Correct Answer
    A. Može da izvrši sve komande
    Explanation
    The given output shows that the /home, /win, and /tmp directories are currently mounted on the system. The user root is attempting to unmount these directories using the "umount" command. Since the user root has the necessary permissions and the directories are currently mounted, the user root can successfully execute all the commands and unmount the directories.

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  • 48. 

    U datoteci /etc/sudoers korisniku student1 dato pravo da izvršava komande chown i find sa akreditivima root korisnika. korisnik student1 može da pokloni svije datoteke korisniku student2 komandom:

    • Sudo / -user student1 -print -exec chown student2 {} \;

    • Find / -user student1 -print -exec chown student2 {} \;

    • Sudo find / -user student1 -print -exec chown student2 {} \;

    • Sudo find / -user student2 -print -exec chown student1 {} \;

    Correct Answer
    A. Sudo find / -user student1 -print -exec chown student2 {} \;
    Explanation
    The correct answer is "sudo find / -user student1 -print -exec chown student2 {} \;". This command uses the "sudo" command to execute the "find" command with the specified options. It searches for files owned by "student1" and prints their paths, then it uses the "exec" option to execute the "chown" command and change the ownership of each found file to "student2".

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  • 49. 

    U datoteci /etc/fstab se nalazi sledeće:

    • Spisak fajl sistema i parametara za montiranje (mount) prilikom podizanja operativnog sistema

    • Spisak fajl sistema i parametara za deaktivranje (umount) prilikom podizanja operativnog sistema

    • Spisak datoteka i parametara za montiranje (mount) prilikom podizanja operativnog sistema

    • Ne znam

    Correct Answer
    A. Spisak fajl sistema i parametara za montiranje (mount) prilikom podizanja operativnog sistema
    Explanation
    The correct answer is "Spisak fajl sistema i parametara za montiranje (mount) prilikom podizanja operativnog sistema." This is because the /etc/fstab file contains a list of file systems and their parameters for mounting during the boot process of the operating system.

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  • Mar 18, 2023
    Quiz Edited by
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  • Jan 17, 2019
    Quiz Created by
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