LINUX INTERVIEW QUESTIONS
1. What is a
context switch?
a)
Kernel switches from executing one process to another.
b) Process switches from kernel mode to user mode.
c) Process switches from user mode to kernel mode.
d) None of the above
View Answer
b) Process switches from kernel mode to user mode.
c) Process switches from user mode to kernel mode.
d) None of the above
View Answer
Answer:a
2. Pid of init
process
a) 0
b) 1
c) 32767
d) none of the above
View Answer
a) 0
b) 1
c) 32767
d) none of the above
View Answer
Answer:b
3. What is the
default maximum number of processes that can exist in Linux?
a) 32768
b) 1024
c) 4096
d) unlimited
View Answer
a) 32768
b) 1024
c) 4096
d) unlimited
View Answer
Answer:a
4. How do you get
parent process identification number?
a) waitpid
b) getpid()
c) getppid()
d) parentid()
View Answer
a) waitpid
b) getpid()
c) getppid()
d) parentid()
View Answer
Answer:c
5. Parent process
id of a deamon process is_________________.
View Answer
View Answer
Answer:1
6. The process
which terminates before the parent process exits becomes
a) Zombie
b) Orphan
c) Child
d) None of the above
View Answer
a) Zombie
b) Orphan
c) Child
d) None of the above
View Answer
Answer:a
7. Return value of
fork() system call can be:
a) -1,<0,0
b) -1,>0,0
View Answer
a) -1,<0,0
b) -1,>0,0
View Answer
Answer:b
8. If the fork()
system call returns -1, then it means?
a) No new child process is created
b) The child process is an orphan
c) The child process is in Zombie
View Answer
a) No new child process is created
b) The child process is an orphan
c) The child process is in Zombie
View Answer
Answer:a
9. Fork returns
_____ to parent process on success
a) 0
b) child process id
c) parent process id
d) none
View Answer
a) 0
b) child process id
c) parent process id
d) none
View Answer
Answer:b
10. How many times
printf() will be executed in the below mentioned program?
main() {
int i;
int i;
for (i = 0; i < 4; i++)
fork();
printf(“my pid = %d\n”, getpid());
}
fork();
printf(“my pid = %d\n”, getpid());
}
a)
4
b) 8
c) 16
d) 32
View Answer
b) 8
c) 16
d) 32
View Answer
Answer:c
11. What is the
output of the below code?
void exit_handler1();
void exit_handler2();
int main() {
int pid;
atexit(exit_handler1);
atexit(exit_handler2);
pid = fork();
if(pid == 0) {
_exit(0);
} else {
sleep(2);
exit(0);
}
return 0;
}
void exit_handler2();
int main() {
int pid;
atexit(exit_handler1);
atexit(exit_handler2);
pid = fork();
if(pid == 0) {
_exit(0);
} else {
sleep(2);
exit(0);
}
return 0;
}
a)
Only child executes the exit_handler 1 and 2.
b) Only parent executes the exit_handler 1 and 2.
c) Both parent and child executes the exit_handler 1 and 2.
d) Neither parent nor child executes the exit_handler 1 and 2.
View Answer
b) Only parent executes the exit_handler 1 and 2.
c) Both parent and child executes the exit_handler 1 and 2.
d) Neither parent nor child executes the exit_handler 1 and 2.
View Answer
Answer:b
12. What is output
of the following program?
int main() {
fork();
fork();
fork();
if (wait(0) == -1)
printf(“leaf child\n”);
}
int main() {
fork();
fork();
fork();
if (wait(0) == -1)
printf(“leaf child\n”);
}
a)
“leaf child” will be printed 1 times
b) “leaf child” will be printed 3 times
c) “leaf child” will be printed 4 times
d) “leaf child” will be printed 8 times
View Answer
b) “leaf child” will be printed 3 times
c) “leaf child” will be printed 4 times
d) “leaf child” will be printed 8 times
View Answer
Answer:c
13. Which niceness
value among the following indicate most favorable scheduling?
a) 0
b) 20
c) 5
d) -19
View Answer
a) 0
b) 20
c) 5
d) -19
View Answer
Answer:d
14. The maximum
time slice that can be given to a process in Linux (where tick is 10ms) is
a) 150ms
b) 10ms
c) 300 ms
d) 600ms
View Answer
a) 150ms
b) 10ms
c) 300 ms
d) 600ms
View Answer
Answer:d
15. Nice can be
used by an ordinary process to
a) increase the priority of a process
b) decrease the priority of a process
c) increase or decrease the priority of a process
View Answer
a) increase the priority of a process
b) decrease the priority of a process
c) increase or decrease the priority of a process
View Answer
Answer:b
16. Which one can
be a real time schedule policy?
a) SCHED_FIFO
b) SCHED_SPF
c) SCHED_OTHER
d) SCHED_FILO
View Answer
a) SCHED_FIFO
b) SCHED_SPF
c) SCHED_OTHER
d) SCHED_FILO
View Answer
17. In Linux
kernel-2.6 Real time priority ranges from
a) 0 to 99
b) 0 to 139
c) -20 to 19
d) 100 to 139
View Answer
a) 0 to 99
b) 0 to 139
c) -20 to 19
d) 100 to 139
View Answer
Answer:a
18. Solaris real
time class priority is
a) 0-59
b) 60-99
c) 100-159
d) 160-169
View Answer
a) 0-59
b) 60-99
c) 100-159
d) 160-169
View Answer
Answer:c
19. Solaris System
class priority is
a) 0-59
b) 60-99
c) 100-159
d) 160-169
View Answer
a) 0-59
b) 60-99
c) 100-159
d) 160-169
View Answer
Answer:b
Memory Management
1. On x86-32 Linux,
at which address the code segment of the program starts?
a) 0×00000000
b) 0×08048000
c) 0×80000000
d) 0xbfff0000
View Answer
a) 0×00000000
b) 0×08048000
c) 0×80000000
d) 0xbfff0000
View Answer
Answer:b
2. On x86-32 Linux,
at which address the user stack resides normally?
a) 0×00000000
b) 0x3fff0000
c) 0x7fff0000
d) 0xbfff0000
View Answer
a) 0×00000000
b) 0x3fff0000
c) 0x7fff0000
d) 0xbfff0000
View Answer
Answer:d
3. A system has
512MB of physical memory. Which among the following is not a suitable virtual
memory size for this system architecture?
a) 512MB
b) 256M
c) 4GB
d) None of the above
View Answer
a) 512MB
b) 256M
c) 4GB
d) None of the above
View Answer
Answer:d
4. LRU stands for
a) Last received Unit
b) Least recently Used
c) Least recently usable
d) Lost Recoverd unit
View Answer
a) Last received Unit
b) Least recently Used
c) Least recently usable
d) Lost Recoverd unit
View Answer
Answer:b
5. Mm_struct
maintains?
a) memory files
b) open files
c) pipe
d) active memory regions
View Answer
a) memory files
b) open files
c) pipe
d) active memory regions
View Answer
Answer:d
6. Which sytem call
can be used by a user process to lock a memory so that it cannot be swapped
out?
View Answer
View Answer
Answer:memlock()
7. Is page table
per process entity?
a) Yes
b) No
View Answer
a) Yes
b) No
View Answer
Answer:a
8. Among these
files which has an ELF format
a) shared objects
b) core
c) executables
d) all of the above
View Answer
a) shared objects
b) core
c) executables
d) all of the above
View Answer
Answer:d
9. What is the use
of strace command?
View Answer
View Answer
Answer:strace
can be used to check the system calls called by the program. So, this can be
used for debugging and benchmarking purposes
10. If one of the
thread in multithreaded process is blocked on an I/O, which of the following is
true?
a) The entire process with block if their is no kernel supported threads
b) Other threads of the process will continue to execute even if there is no kernel supported threads
c) It depends on specific implementatation
d) All of the above
View Answer
a) The entire process with block if their is no kernel supported threads
b) Other threads of the process will continue to execute even if there is no kernel supported threads
c) It depends on specific implementatation
d) All of the above
View Answer
Answer:a
File Management 1
1. Each process has
unique
a) fd table
b) file table
c) inode table
d) data block table
View Answer
a) fd table
b) file table
c) inode table
d) data block table
View Answer
Answer:a
2. File descriptor
table indexes which kernel structure?
a) struct file
b) strruct fs_struct
c) files_struct
d) struct inode
View Answer
a) struct file
b) strruct fs_struct
c) files_struct
d) struct inode
View Answer
Answer:a
3. What is the
default number of files open per user process?
a) 0
b) 1
c) 2
d) 3
View Answer
a) 0
b) 1
c) 2
d) 3
View Answer
Answer:d
4. The file system
information is stored in
a) Boot block
b) Super Block
c) Inode Table
d) Data Block
View Answer
a) Boot block
b) Super Block
c) Inode Table
d) Data Block
View Answer
Answer:b
5. Switch table is
used by
a) device special file
b) directory file
c) fifo
d) link file.
View Answer
a) device special file
b) directory file
c) fifo
d) link file.
View Answer
Answer:a
6. What is the use
of fcntl function?
a) locking a file
b) reading the file descriptor flag
c) changing the file status flag
d) all the above
View Answer
a) locking a file
b) reading the file descriptor flag
c) changing the file status flag
d) all the above
View Answer
Answer:d
7. Which function
can be used instead of the dup2 to duplicate the file descriptor?
a) read()
b) open()
c) stat()
d) fcntl()
View Answer
a) read()
b) open()
c) stat()
d) fcntl()
View Answer
Answer:d
8. printf() uses
which system call
a) open
b) read
c) write
d) close
View Answer
a) open
b) read
c) write
d) close
View Answer
Answer:c
9. read() system
call on success returns
a) 0
b) -1
c) number of character
d) none
View Answer
a) 0
b) -1
c) number of character
d) none
View Answer
Answer:c
10. Which system
call is used to create a hard link?
a) hardlink
b) link
c) symlink
d) ln
View Answer
a) hardlink
b) link
c) symlink
d) ln
View Answer
Answer:b
11. namei() is
a) ANSI C library function
b) C library function
c) System call
d) kernel routine
View Answer
a) ANSI C library function
b) C library function
c) System call
d) kernel routine
View Answer
Answer:d
12. dup2(1,0)
a) closes the stdout and copies the stdin descriptor to stdout
b) closes the stdin and copies the stdout descriptor to stdin
c) will produce compilation error
d) None of the above
View Answer
a) closes the stdout and copies the stdin descriptor to stdout
b) closes the stdin and copies the stdout descriptor to stdin
c) will produce compilation error
d) None of the above
View Answer
Answer:b
File Management 2
1. Given a code snippet below?
#define PERMS (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH |
S_IWOTH)
int main() {
int fd1, fd2;
umask(0);
fd1 = open(“file1”, O_CREAT | O_RDWR, PERMS)
umask(S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
fd2 = open(“file2”, O_CREAT | O_RDWR, PERMS)
return 0;
}
int main() {
int fd1, fd2;
umask(0);
fd1 = open(“file1”, O_CREAT | O_RDWR, PERMS)
umask(S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH);
fd2 = open(“file2”, O_CREAT | O_RDWR, PERMS)
return 0;
}
The newly created files file1 and file2 will have the permissions
respectively
a) rw-rw-rw- r——–
b) r——– rw-rw-rw-
c) rw-rw-rw- rw——-
d) None of the above
View Answer
a) rw-rw-rw- r——–
b) r——– rw-rw-rw-
c) rw-rw-rw- rw——-
d) None of the above
View Answer
Answer:c
2. Below is the
code
int main() {
int fd1, fd2;
struct stat buff1, buff2;
fd1 = open(“1.txt”, O_RDWR);
fd2 = open(“2.txt”, O_RDWR | O_APPEND);
lseek(fd1, 10000, SEEK_SET);
write(fd1, “abcdefghij”, 10);
write(fd2, “abcdefghij”, 10);
fstat(fd1, &buff1);
fstat(fd2, &buff2);
printf(“ %d %d”, buff1.st_size, buff2.st_size);
return 0;
}
int fd1, fd2;
struct stat buff1, buff2;
fd1 = open(“1.txt”, O_RDWR);
fd2 = open(“2.txt”, O_RDWR | O_APPEND);
lseek(fd1, 10000, SEEK_SET);
write(fd1, “abcdefghij”, 10);
write(fd2, “abcdefghij”, 10);
fstat(fd1, &buff1);
fstat(fd2, &buff2);
printf(“ %d %d”, buff1.st_size, buff2.st_size);
return 0;
}
Before running the program, the file 1.txt and 2.txt size is 20
each. What is the output?
a) 30 30
b) 100020 20
c) 100030 30
d) 100010 30
View Answer
a) 30 30
b) 100020 20
c) 100030 30
d) 100010 30
View Answer
Answer:d
3. What is stored
in logfile as per below mentioned code if we execute ./a.out > logfile?
int main() {
int fd;
close(1);
fd = open(“logfile”,O_RDWR, 0744);
write(fd, “Hello”, 5);
printf(“World\n”);
return 0;
}
int fd;
close(1);
fd = open(“logfile”,O_RDWR, 0744);
write(fd, “Hello”, 5);
printf(“World\n”);
return 0;
}
a) Hello
b) HelloWorld
c) World
d) None
View Answer
b) HelloWorld
c) World
d) None
View Answer
Answer:b
4. For the below
mentioned code,
int main() {
int fd;
fd = open(“logfile”, O_CREAT|O_RDWR, 0600);
lseek(fd, 5, SEEK_CUR);
write(fd, “Hello”, 5);
return 0;
}
int fd;
fd = open(“logfile”, O_CREAT|O_RDWR, 0600);
lseek(fd, 5, SEEK_CUR);
write(fd, “Hello”, 5);
return 0;
}
What is the logfile size now if it’s initially was 1024 bytes?
a) 5
b) 1024
c) 1029
d) 1034
View Answer
a) 5
b) 1024
c) 1029
d) 1034
View Answer
Answer:b
5. Code snippets
str1=”45678\n”
str2=”123\n”
f1 = fopen(file1,RDWR,RWX)
f2 = fopen(file1,RDWR,RWX)
write(f1,str1,len_str1)
write(f2,str2,len_str2)
str2=”123\n”
f1 = fopen(file1,RDWR,RWX)
f2 = fopen(file1,RDWR,RWX)
write(f1,str1,len_str1)
write(f2,str2,len_str2)
o/p:
a) 12378
b) 123(newline)8(newline)
c) 123(newline)78(newline)
d) 45678(newline)123(newline)
View Answer
b) 123(newline)8(newline)
c) 123(newline)78(newline)
d) 45678(newline)123(newline)
View Answer
Answer:b
6. Code snippets
str1=”45678\n”
str2=”123\n”
f1 = fopen(file1,RDWR,RWX)
f2 = dup(f1)
write(f1,str1,len_str1)
write(f2,str2,len_str2)
str2=”123\n”
f1 = fopen(file1,RDWR,RWX)
f2 = dup(f1)
write(f1,str1,len_str1)
write(f2,str2,len_str2)
o/p:
a) 12378
b) 123(newline)8(newline)
c) 123(newline)78(newline)
d) 45678(newline)123(newline)
View Answer
b) 123(newline)8(newline)
c) 123(newline)78(newline)
d) 45678(newline)123(newline)
View Answer
Answer:d
7. Code snippet
(file1 size is 2024)
f1 = fopen (file1, RDWR, RWX)
lseek(f1,1024,SEEK_SET)
write(f1,buf,10)
What is offset now.
lseek(f1,1024,SEEK_SET)
write(f1,buf,10)
What is offset now.
a) 1024
b) 1034
c) 2034
d) 2054
View Answer
b) 1034
c) 2034
d) 2054
View Answer
Answer:b
Signal Handling
1. If a signal is
received by a process, when will it be processed?
a) It is processed immediately
b) It is processed when process is switching to kernel mode
c) It is processsed in the next timeslice given to the process
View Answer
a) It is processed immediately
b) It is processed when process is switching to kernel mode
c) It is processsed in the next timeslice given to the process
View Answer
Answer:b
2. Which signal is
generated when we press control-C?
a) SIGINT
b) SIGTERM
c) SIGKILL
d) SIGSEGV
View Answer
a) SIGINT
b) SIGTERM
c) SIGKILL
d) SIGSEGV
View Answer
Answer:a
3. Which signal is
generated when we press ctrl-Z?
a) SIGKILL
b) SIGSTOP
c) SIGABRT
d) SIGINT
View Answer
a) SIGKILL
b) SIGSTOP
c) SIGABRT
d) SIGINT
View Answer
Answer:d
4. Which signal is
sent when the Child process terminates?
a) SIGINIT
b) SIGKILL
c) SIGSTOP
d) SIGCHLD
View Answer
a) SIGINIT
b) SIGKILL
c) SIGSTOP
d) SIGCHLD
View Answer
Answer:b
5. Which of the
following signal cannot be handled or ignored?
a) SIGINT
b) SIGCHLD
c) SIGKILL
d) SIGALRM
View Answer
a) SIGINT
b) SIGCHLD
c) SIGKILL
d) SIGALRM
View Answer
Answer:c
6. Another signal
that cannot be caught is:
a) SIGPIPE
b) SIGHUP
c) SIGSTOP
d) SIGUSR1
View Answer
a) SIGPIPE
b) SIGHUP
c) SIGSTOP
d) SIGUSR1
View Answer
Answer:c
7. When real
interval timer expires which signal is generated?
a) SIGINT
b) SIGCHLD
c) SIGKILL
d) SIGALRM
View Answer
a) SIGINT
b) SIGCHLD
c) SIGKILL
d) SIGALRM
View Answer
Answer:d
8. Signals are
handled using which system call?
a) kill
b) signal
c) both
d) none
View Answer
a) kill
b) signal
c) both
d) none
View Answer
Answer:b
9. Default action
of SIGSEGV is
a) Terminate
b) Core dump
c) Stop
d) Cont
View Answer
a) Terminate
b) Core dump
c) Stop
d) Cont
View Answer
Answer:b
10. The kill system
call is used to
a) Send shutdown messages to all by superuser
b) Send a signal to a process
c) Kill processes
d) Stop the processes
View Answer
a) Send shutdown messages to all by superuser
b) Send a signal to a process
c) Kill processes
d) Stop the processes
View Answer
Answer:b
11. What is the
output of the below code?
void sig_handler ( int signum) {
printf(“Handled the signal\n”);
}
printf(“Handled the signal\n”);
}
int main() {
int pid;
signal (SIGKILL, sig_handler);
pid = fork();
if (pid==0) {
kill(getppid(), SIGKILL);
exit(0);
} else {
sleep(20);
}
return 0;
}
int pid;
signal (SIGKILL, sig_handler);
pid = fork();
if (pid==0) {
kill(getppid(), SIGKILL);
exit(0);
} else {
sleep(20);
}
return 0;
}
a) Error child cannot send a SIGKILL signal to parent.
b) Parent goes to the signal handler, prints handled the signal and goes back to sleep
c) Parent goes to the signal handler, prints handled the signal and exits
d) Parent exits without going to the signal handler
View Answer
b) Parent goes to the signal handler, prints handled the signal and goes back to sleep
c) Parent goes to the signal handler, prints handled the signal and exits
d) Parent exits without going to the signal handler
View Answer
Answer:d
IPC – 1
1. Which is true
regarding pipes?
a) half duplex
b) full duplex
c) message boundaries are preserved
d) Unordered data
View Answer
a) half duplex
b) full duplex
c) message boundaries are preserved
d) Unordered data
View Answer
Answer:a
2. The persistancy
of a FIFO is
a) process
b) kernel
c) file system
d) none
View Answer
a) process
b) kernel
c) file system
d) none
View Answer
Answer:c
3. Advantage of
FIFO over pipe is
a) related processes can communicate
b) unrelated processes can communicate
c) none
View Answer
a) related processes can communicate
b) unrelated processes can communicate
c) none
View Answer
Answer:b
4. What mkfifo()
creats?
a) pipe
b) unnamed pipe
c) named pipe
d) msg queue
View Answer
a) pipe
b) unnamed pipe
c) named pipe
d) msg queue
View Answer
Answer:c
5. System V IPC
common attributes are
a) key
b) id
c) owner
d) all the above
View Answer
a) key
b) id
c) owner
d) all the above
View Answer
Answer:d
6. Which one of the
following is not system V IPC ?
a) Shared Memory
b) Semaphores
c) FIFO
d) Message Queues
View Answer
a) Shared Memory
b) Semaphores
c) FIFO
d) Message Queues
View Answer
7. Which system
call is used to create Sys V message Queue.
a) msgget
b) shemget
c) semget
d) msgctl
View Answer
a) msgget
b) shemget
c) semget
d) msgctl
View Answer
Answer:a
8. Which is not the
correct option for removing a message queue
a) ipcrm -Q
b) ipcrm -q
c) ipcrm -m
d) None
View Answer
a) ipcrm -Q
b) ipcrm -q
c) ipcrm -m
d) None
View Answer
Answer:c
9. Message queues
are created in
a) userspace
b) kernelspace
c) both
d) none
View Answer
a) userspace
b) kernelspace
c) both
d) none
View Answer
Answer:b
IPC – 2
1. Command used to
check shared memory is
a) ipcs
b) ipcs -m
c) ipcs -s
d) ipcs -q
View Answer
a) ipcs
b) ipcs -m
c) ipcs -s
d) ipcs -q
View Answer
Answer:b
2. Which is Fastest
IPC?
a) Message Queue
b) shared memory
c) Socket
d) all
View Answer
a) Message Queue
b) shared memory
c) Socket
d) all
View Answer
Answer:b
3. What is the
persistancy level of Shared memory segments?
a) signal
b) process
c) file system
d) kernel
View Answer
a) signal
b) process
c) file system
d) kernel
View Answer
Answer:d
4. The structure
which keeps the information about shared memory in the kernel is
a) struct ipc_perm
b) struct semid_ds
c) struct shmid_ds
d) struct msgid_ds
View Answer
a) struct ipc_perm
b) struct semid_ds
c) struct shmid_ds
d) struct msgid_ds
View Answer
Answer:c
5. One process
requires M resource to complete a job. What should be the minimum number of
resources available for N processes so that at least one process can continue
to execute without blocking/waiting?
a) M * N
b) M * N – 1
c) M * N + 1
d) M
View Answer
a) M * N
b) M * N – 1
c) M * N + 1
d) M
View Answer
Answer:d
6. Semaphore P( )
operation usually does the following:
a) descrements the semaphore count and the process sleeps if needed
b) increments the semaphore count
c) wakes up a sleeping process
View Answer
a) descrements the semaphore count and the process sleeps if needed
b) increments the semaphore count
c) wakes up a sleeping process
View Answer
Answer:a
7. Which call to
use to set the resource count of semaphore?
a) semget( )
b) semctl( )
c) sem_setcount( )
d) sem_set_count( )
View Answer
a) semget( )
b) semctl( )
c) sem_setcount( )
d) sem_set_count( )
View Answer
Answer:d
8. Race condition
can be avoided by using
a) semaphore
b) mutex
c) Socket
d) both a & b
View Answer
a) semaphore
b) mutex
c) Socket
d) both a & b
View Answer
Answer:d
9. A server which
is handling one client at a time is called as
a) single server
b) multiserver
c) concurrent server
d) iterative server
View Answer
a) single server
b) multiserver
c) concurrent server
d) iterative server
View Answer
Answer:d
10. A server which
is handling many clients at a time is called as
a) single server
b) multiserver
c) concurrent server
d) iterative server
View Answer
a) single server
b) multiserver
c) concurrent server
d) iterative server
View Answer
Answer:c
11. A communication
end-point is identified by
a) IP address
b) port number
c) both a and b
d) none
View Answer
a) IP address
b) port number
c) both a and b
d) none
View Answer
Answer:c
Linux Systems
1. UNIX/Linux
kernel is?
a) Monolithic
b) micro
c) Exo
d) nano
View Answer
a) Monolithic
b) micro
c) Exo
d) nano
View Answer
Answer:a
2. Monolithic
kernel
a) is highly extensiblity
b) has less run time overhead
c) smaller than micro level
d) Suitable for real time system
View Answer
a) is highly extensiblity
b) has less run time overhead
c) smaller than micro level
d) Suitable for real time system
View Answer
Answer:b
3. Runlevel system
command is used for?
a) getting the present and previous runlevel of the system
b) setting the runlevel attribute of the system in the inittab file
c) can be used to restart or reboot the system
d) all of the above
View Answer
a) getting the present and previous runlevel of the system
b) setting the runlevel attribute of the system in the inittab file
c) can be used to restart or reboot the system
d) all of the above
View Answer
Answer:d
4. Pick the run
level to run Linux in multi user mode with networking?
a) 0
b) 3
c) 5
d) 6
View Answer
a) 0
b) 3
c) 5
d) 6
View Answer
Answer:b
5. Section 2 of
manpage describes
a) Commands
b) System calls
c) Function calls
d) Drivers
View Answer
a) Commands
b) System calls
c) Function calls
d) Drivers
View Answer
Answer:b
6. System call can
be implemented using which assembly instruction(s) on x86 processors?
a) int 0×80
b) sysenter
c) both a & b
d) None
View Answer
a) int 0×80
b) sysenter
c) both a & b
d) None
View Answer
Answer:c
7. Which of the
following exec call is a system call?
a) execl
b) execlp
c) execve
d) execvp
View Answer
a) execl
b) execlp
c) execve
d) execvp
View Answer
Answer:c
8. x86 architecture
uses big endian or little endian addressing mechanism?
View Answer
View Answer
Answer::little-endian
9. ______________
timer is decremented only when the process is executing
a) ITIMER_REAL
b) ITIMER_VIRTUAL
c) ITIMER_PROF
d) None of the above
View Answer
a) ITIMER_REAL
b) ITIMER_VIRTUAL
c) ITIMER_PROF
d) None of the above
View Answer
Answer:b
10. Daemon process
is a?
a) group leader
b) session leader
c) orphan process
d) all the above
View Answer
a) group leader
b) session leader
c) orphan process
d) all the above
View Answer
Answer:d
11. The terminal
used by a Daemon process is:
a) any terminal
b) no terminal
b) root terminal
d) system console
View Answer
a) any terminal
b) no terminal
b) root terminal
d) system console
View Answer
Answer:b
12. shared memory
can be used for?
a) read only operations
b) append
c) read or read write operations
d) write only
View Answer
a) read only operations
b) append
c) read or read write operations
d) write only
View Answer
Answer:c
No comments:
Post a Comment