Multiple Choice Questions & Answer:-
Q.1 Source code is not available for user in.
(a)Open Source
(b)Bharat OS
(c)Linux OS
(d)None
Answer : B
Q.2 Linux is closed source.
(a)True
(b)False
Answer : B
Q.3 Bash is the ___________.
(a)Shell
(b)Compiler
(c)None
Answer : A
Q.4 BOSS is developed by.
(a)NASA
(b)IUCCA
(c)C-DAC
(d)NASDAQ
Answer : C
Q.5 BOSS is developed over.
(a)Mandrake
(b)SUSE
(c)Fedora
(d)Debian
Answer : D
Q.6 Android is desktop OS.
(a)True
(b)False
Answer : B
Q.7 3DBlender is close source.
(a)True
(b)False
Answer : B
Q.8 Mozilla Firefox is _________ .
(a)Browser
(b)Editor
(c)Compiler
(d)None of Above
Answer : A
Q.9 Google chrome is _________.
(a)Compiler
(b)OS
(c)Editor
(d) None of Above
Answer : D
Q.10 Windows OS is a closed source.
(a)True
(b)False
Answer : A
Q.11 Microsoft .NET is _________
(a)Open Source
(b)Closed Source
(c)Browser
(d)All of above
Answer : B
Q.12 Is the windows command
(a)True
(b)False
Answer : B
Q.13 Which of the following command gives the list of the users in the systems
(a)whoami
(b)ps
(c)ds
(d)who
Answer : D
Q.14 ________is the linux flavor which runs from CD
(a)Knopix
(b)SUSE
(c)Fedora
(d)Ubuntu
Answer : A
Q.15 OSF stands for_________
(a) O.S. Factory
(b)Open software foundation
(c)Open system foundation
(d)None
Answer : B
Q.16 Open source software are very costly
(a)True
(b)False
Answer : B
Q.17 Internet Explorer comes along with ________
(a)Linux
(b)Windows
(c)MAC
(d)Android
Answer : B
Q.18 which browser comes with linux by default
(a)Mozilla Firebox
(b)IE
(c)Opera
(d)None
Answer : C
Q.19 BOSS is developed in _______
(a)USA
(b)UK
(c)India
(d)China
Answer : C
Q.20 Which of the following is the closed source
(a)3D Max
(b)Blender
(c)Linux
(d)Android
Answer : A
Q.21 PHP is the Open Source
(a)True
(b)False
Answer : A
Q.22 ______ Determines which piece of large program need to be recompiled
(a)rpm
(b)make
(c)yum
(d)None of above
Answer : B
Q.23 ______Execute a command as another user
(a)who
(b)tty
(c)chmod
(d)sudo
Answer : D
Q.24 __ is used to install and remove packages and control downloading them from a repository
(a)rpm
(b)who
(c)yum
(d)Is
Answer : A
Q.25 Which of the following is not flavor of linux?
(a)Mandrake
(b)SUSAN
(c)Redhat
(d)Fedora
Answer : B
Q.26 7-zip is ___________
(a)File achiever
(b)Web browser
(c)Editor
(d)None of above
Answer : A
Q.27 Ubuntu is windows based
(a)True
(b)False
Answer : B
Q.28 ________ is HTTP web server
(a)Lucene
(b)Fedora
(c)Perl
(d)Apache
Answer : D
Q.29 Symbian is valid Linux Based Shell
(a)True
(b)False
Answer : A
Q.30 Following is valid Linux based Shell
(a)C-shell
(b)D-shell
(c)K-shell
(d)None of above
Answer : A
Q.31 Shell is the exclusive feature of
(a)UNIX
(b)DOS
(c)System software
(d)Application software
Answer : A
Q.32 Operating system is
(a)Hardware
(b)Software which manage resources of the system
(c)Software which performs computation
(d)None
Answer : B
Q.33 A system call is a method by which a program makes a request to the
(a) Input Management
(c) Interrupt processing
(b) Output Management
(d)Operating system
Answer : D
34. To increase the response time and throughput, the kernel minimizes the frequency of disk access by keeping a pool of internal data buffer called
a) Pooling
b) Spooling
c) Buffer cache
d) Swapping
Answer:c
35. At start of process execution, STDOUT & STDERR
a) Point to current terminal device
b) Are closed
c) Point to special files on the system
d) None of the above
Answer:a
36. wtmp and utmp files contain:
a) Temporary system data
b) User login-logout log
c) The user’s command execution log
d) The user’s su and sudo attempts
Answer:b
37. Which is the core of the operating system?
a) Shell
b) Kernel
c) Commands
d) Script
Answer:b
38. ILP32 stands for
a) 32 bit Integer, Long & Pointer
b) 32 bit Integrated Long & Pointer
c) 32 bit Intelligent Long & Pointer
d) 32 bit Long & Pointer
Answer:a
39. Single Unix Specification Version 2 provides enhanced support for
a) 16 bit Unix
b) 32 bit Unix
c) 64 bit Unix
d) 8 bit Unix
Answer:c
40. Under UNIX the key board is the default input device and the monitor is the default output device
a) True
b) False
Answer:a
41. Which among the following interacts directly with system hardware?
a) Shell
b) Commands
c) Kernel
d) Applications
Answer:c
42. Applications communicate with kernel by using:
a) System Calls
b) C Programs
c) Shell Script
d) Shell
Answer:a
43.This set of Linux / Unix interview questions and answers focuses on various Unix administration commands. It will be useful for anyone learning basic Unix Administration as well as preparing for interviews on Unix.
1. SVR4 was developed by
a) Sun Microsystems
b) AT&T
c) University of Berkeley
d) Sun and AT&T jointly
Answer:d
44. Which of these is not a Unix Flavor?
a) BSD
b) MAC
c) AIX
d) IRIX
Answer:b
45. Which of the following statement is FALSE ?
a) Unix supports multiple users
b) Linux is an open source operating system and the source code is shared
c) Shell takes care of inter process communication
d) Shell provides the feature of I/O Redirection
Answer:c
46. Which of the following UNIX flavor is from IBM?
a) BSD
b) Solaris
c) HP-UX
d) AIX
Answer:d
47. What are the sizes of (Integer/Long/Pointer) in LP64 programming model?
a) 8/8/8
b) 4/4/8
c) 4/8/8
d) 4/8/4
Answer:c
48. Which among the following is used to write small programs to control Unix functionalities?
a) Shell Commands
b) Shell Script
c) Filters
d) C Language
Answer:b
49. What control character signals the end of the input file?
a) ctrl + a
b) ctrl + b
c) ctrl + c
d) ctrl + d
Answer:d
50. Which command is used to display the octal value of the text
a) octal
b) text_oct
c) oct
d) od
Answer:d
52. Which command is used to view compressed text file contents
a) cat
b) type
c) zcat
d print
Answer:c
53. Which command changes a file’s group owner
a) cgrp
b) chgrp
c) change
d) group
Answer:b
54. Which command is used to extract intermediate result in a pipeline
a) tee
b) extract
c) exec
d) none of the above
Answer:a
55. Which command is used to extract a column from a text file
a) paste
b) get
c) cut
d) tar
Answer:c
56. Which command is used to display disk consumption of a specific directory
a) du
b) ds
c) dd
d) dds
Answer:a
57. Which command is used to perform backup in unix?
a) backup
b) cpio
c) zip
d) gzip
Answer:b
58. Which command creates an empty file if file does not exist?
a) cat
b) touch
c) ed
d) read
Answer:b
59. Which option of rm command is used to remove a directory with all its subdirectories
a) –b
b) –o
c) –p
d) –r
Answer:d
60. Write the command to display the current date in the form dd/mm/yyyy.
a) date +%d/%m/%Y
b) date +”%d/%m/%Y”
c) date +/%d/%m/20%y
d) date +”/%d/%m/20%y”
Answer:a
61. The command syntax to display the file ‘sample.txt’ one page at a time is
a) man sample.txt>more
b) cat sample.txt new.txt
b) sed ‘s/cat/mouse’ old.txt new.txt
c) sed ‘/s/cat/mouse/g’ old.txt new.txt
d) sed ‘/s/cat/mouse’ old.txt > new.txt
Answer:a
88. Which command will delete all the blank lines in file old.txt?
a) sed ‘/d’ old.txt
b) sed ‘/^/d’ old.txt
c) sed ‘/^$/d’ old.txt
d) sed ‘/^*/d’ old.txt
Answer:c
89. The command “sed -n ‘/sanfoundry/p’ old.txt” will
a) print the lines containing the word ‘sanfoundry’ in file old.txt
b) delete the lines containing the word ‘sanfoundry’ in file old.txt
c) will generate an error message
d) none of the mentioned
Answer:a
90. Which option is used by sed to specify that the following string is an instruction or set of instructions?
a) -n
b) -e
c) -f
d) -i
Answer:a
91. When we install a new package in linux system, then
a) all the files of the packages are installed in a single directory
b) different files are installed at different locations of the file system
c) package works just after extraction, installation is not required
d) none of the mentioned
Answer:b
92. Host specific configuration files are installed in
a) /etc directory
b) /lib directory
c) /root directory
d) /bin directory
Answer:a
93. The directory /media is the
a) mount point for removable media
b) mount point for filesystem
c) both (a) and (b)
d) none of the mentioned
Answer:a
94. What is /bin/sh ?
a) bourne shell
b) hard or symbolic link to the real shell command
c) bash shell
d) both (b) and (c)
Answer:b
95. The /boot directory stores the data that is used
a) before the kernel begins executing user mode programs
b) after the kernel begins executing user mode programs
c) before the bootloader is loaded in the RAM
d) none of the mentioned
Answer:a
96. Which one of the directory does not contain binary files?
a) /bin
b) /sbin
c) /etc
d) none of the mentioned
Answer:c
97. Kernel modules are present in
a) /lib directory
b) /root directory
c) /boot directory
d) none of the mentioned
Answer:a
98. The directory /opt is reserved for
a) installation of add-on application software packages
b) optional booting files
c) optional user specific files
d) none of the mentioned
Answer:a
99. The directory /srv contains
a) site-specific data which is served by the system
b) all the system files
c) all the service files provided by the specific user
d) none of the mentioned
Answer:a
100. Any file or directory present in the ______ directory may not be reserved between the invocation of the program.
a) /var
b) /tmp
c) /etc
d) all of the mentioned
Answer:b
101. 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
Answer:a
102. Pid of init process
a) 0
b) 1
c) 32767
d) none of the above
Answer:b
103. What is the default maximum number of processes that can exist in Linux?
a) 32768
b) 1024
c) 4096
d) unlimited
Answer:a
104. How do you get parent process identification number?
a) waitpid
b) getpid()
c) getppid()
d) parentid()
Answer:c
105. The process which terminates before the parent process exits becomes
a) Zombie
b) Orphan
c) Child
d) None of the above
Answer:a
106. Return value of fork() system call can be:
a) -1,<0,0
b) -1,>0,0
Answer:b
107. 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
Answer:a
108. Fork returns _____ to parent process on success
a) 0
b) child process id
c) parent process id
d) none
Answer:b
109. How many times printf() will be executed in the below mentioned program?
main() {
int i;
for (i = 0; i < 4; i++)
fork();
printf(“my pid = %dn”, getpid());
}
a) 4
b) 8
c) 16
d) 32
Answer:c
110. 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;
}
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.
Answer:b
111. What is output of the following program?
int main() {
fork();
fork();
fork();
if (wait(0) == -1)
printf(“leaf childn”);
}
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
Answer:c
112. Which niceness value among the following indicate most favorable scheduling?
a) 0
b) 19
c) 5
d) -20
Answer:d
113. 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
Answer:d
114. 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
Answer:b
115. Which one can be a real time schedule policy?
a) SCHED_FIFO
b) SCHED_SPF
c) SCHED_OTHER
d) SCHED_FILO
Answer:a
116. Solaris real time class priority is
a) 0-59
b) 60-99
c) 100-159
d) 160-169
Answer:c
117. On x86-32 Linux, at which address the code segment of the program starts?
a) 0x00000000
b) 0x08048000
c) 0x80000000
d) 0xbfff0000
Answer:b
118. On x86-32 Linux, at which address the user stack resides normally?
a) 0x00000000
b) 0x3fff0000
c) 0x7fff0000
d) 0xbfff0000
Answer:d
119. 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
Answer:d
120. LRU stands for
a) Last received Unit
b) Least recently Used
c) Least recently usable
d) Lost Recoverd unit
Answer:b
121. Mm_struct maintains?
a) memory files
b) open files
c) pipe
d) active memory regions
Answer:d
122. Is page table per process entity?
a) Yes
b) No
Answer:a
123. Among these files which has an ELF format
a) shared objects
b) core
c) executables
d) all of the above
Answer:d
124. 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
Answer:a
125. UNIX/Linux kernel is?
a) Monolithic
b) micro
c) Exo
d) nano
Answer:a
126. Monolithic kernel
a) is highly extensiblity
b) has less run time overhead
c) smaller than micro level
d) Suitable for real time system
Answer:b
127. 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
Answer:d
128. Pick the run level to run Linux in multi user mode with networking?
a) 0
b) 3
c) 5
d) 6
Answer:b
129. Section 2 of manpage describes
a) Commands
b) System calls
c) Function calls
d) Drivers
Answer:b
130. 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
Answer:c
131. Which of the following exec call is a system call?
a) execl
b) execlp
c) execve
d) execvp
Answer:c
132. ______________ timer is decremented only when the process is executing
a) ITIMER_REAL
b) ITIMER_VIRTUAL
c) ITIMER_PROF
d) None of the above
Answer:b
133.Daemon process is a?
a) group leader
b) session leader
c) orphan process
d) all the above
Answer:d
134. The terminal used by a Daemon process is:
a) any terminal
b) no terminal
b) root terminal
d) system console
Answer:b
135. shared memory can be used for?
a) read only operations
b) append
c) read or read write operations
d) write only
Answer:c
136. Sysconf(_SC_PAGE_SIZE) returns?
a) size of the page
b) max size of the page
c) min size of the page
d) PAGING ALLOWED OR NOT
Answer:a