MCQOPTIONS
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MCQOPTIONS
This section includes 713 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science Engineering (CSE) knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Non leaf node of the file system structure is………….. |
| A. | leaf node of file |
| B. | directory of file |
| C. | regular file |
| D. | path name |
| Answer» C. regular file | |
| 52. |
Choose the correct answers if the command ls -l /dev/mt0 display'sbrw_rw_ _ _ _ 1 root 3, 0 Apr18 1:05 mt0 |
| A. | the \b\ indicates that it is a special file |
| B. | mt0 indicates that it is a tape drive |
| C. | the \ b\ indicates that data transfer is done in blocks |
| D. | all of these |
| Answer» E. | |
| 53. |
Operating System is also called as ………. |
| A. | system kernel |
| B. | kernel |
| C. | both a and b |
| D. | none of these |
| Answer» D. none of these | |
| 54. |
Out of 64 system calls in system V how many are frequently used… |
| A. | 64 |
| B. | 32 |
| C. | 16 |
| D. | 128 |
| Answer» C. 16 | |
| 55. |
exec system call…….. |
| A. | create a new process |
| B. | finish executing a process |
| C. | control the size of memory allocated to a process |
| D. | overlay image of a program onto the running process |
| Answer» E. | |
| 56. |
At run level the system is complelety shut down. |
| A. | 4 |
| B. | 3 |
| C. | 1 |
| Answer» E. | |
| 57. |
When a process creates a new file, the kernel assigns it an ……... |
| A. | used inode |
| B. | unused inode |
| C. | integer number |
| D. | file number |
| Answer» C. integer number | |
| 58. |
Permission mode 0666(octal) means………… |
| A. | allowing all users acess to file for writing |
| B. | allowing all users acess to file for reading |
| C. | restrict to read and write |
| D. | allowing all users access to file for reading writing |
| Answer» E. | |
| 59. |
What is the output of the following program?b =[ -n $b ]echo $? [ -z $b ]echo $? |
| A. | 1 1 |
| B. | 2 2 |
| C. | 0 0 |
| D. | 0 1 |
| Answer» D. 0 1 | |
| 60. |
Schedular module allocate ….. |
| A. | processes to cpu |
| B. | cpu to processes |
| C. | processes to kernel |
| D. | none |
| Answer» C. processes to kernel | |
| 61. |
What is the command to set the execute permissions to all the files and subdirectories within the directory/home/user1/direct |
| A. | chmod –r +x/home/user1/direct |
| B. | chmod –r +x/home/user1/direct |
| C. | chmod –f –r +x/home/user1/direct |
| D. | chmod –f +x/home/user1/dire ct |
| Answer» C. chmod –f –r +x/home/user1/direct | |
| 62. |
System accounting program acctcom find………. |
| A. | variable length record |
| B. | fixed length record |
| C. | no record |
| D. | none of these |
| Answer» C. no record | |
| 63. |
brk system call………… |
| A. | synchronize process execution with exit of previously forked process |
| B. | control the size of memory allocated to a process |
| C. | finish executing a process |
| D. | overlay image of a program onto the running process |
| Answer» C. finish executing a process | |
| 64. |
With inode, the kernel contains two data structures…………. |
| A. | file table and user file descriptor table |
| B. | file system and kernel |
| C. | file and semaphore |
| D. | none |
| Answer» B. file system and kernel | |
| 65. |
System treats the data in a directory as a…………….. |
| A. | byte stream |
| B. | bit stream |
| C. | stream |
| D. | none of these |
| Answer» B. bit stream | |
| 66. |
Permission mode on newly created file will be…… |
| A. | 0666(octal) |
| B. | 0666(hexadecimal) |
| C. | 0999(octal) |
| D. | 0798(hex) |
| Answer» B. 0666(hexadecimal) | |
| 67. |
When the read system call encounters EOF,it returns |
| A. | some positive integer |
| B. | some negative integer |
| C. | -1 |
| Answer» D. | |
| 68. |
For the below mentioned codeint main() { int fd;fd = open(“logfile”, O_CREAT|O_RDWR, 0600);lseek(fd, 5, SEEK_CUR);write(fd, “Hello”, 5);return 0;}, |
| A. | 5 |
| B. | 1024 |
| C. | 1029 |
| D. | 1034 |
| Answer» C. 1029 | |
| 69. |
interacts with inner part of kernel |
| A. | interface |
| B. | shell |
| C. | terminal |
| D. | compiler |
| Answer» C. terminal | |
| 70. |
wait system call………… |
| A. | finish executing a process |
| B. | control the size of memory allocated to a process |
| C. | synchronize process execution with exit of previously forked process |
| D. | overlay image of a program onto the running process |
| Answer» D. overlay image of a program onto the running process | |
| 71. |
You want there to be 3 grace days after a password expires before an account becomes disabled. How would you do this? |
| A. | use the useradd command with the -f switch |
| B. | check the delay option in user admin |
| C. | edit the user\s user.config file |
| D. | use the useradd command with the -d switch |
| Answer» B. check the delay option in user admin | |
| 72. |
What is the return value ($?) of this code:os = Unix[$osName = UnixName] && exit 2 [${os}Name = UnixName] && exit 3 |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» E. | |
| 73. |
Directories are ……. |
| A. | fixed files |
| B. | regular files |
| C. | variable files |
| D. | none of these |
| Answer» C. variable files | |
| 74. |
init’s job after basic system initialization is |
| A. | is to take over the system start-up procedure |
| B. | complete the system bootstrap process |
| C. | both a and b |
| D. | none |
| Answer» D. none | |
| 75. |
Services provided by kernel are……… |
| A. | controlling execution of process |
| B. | scheduling processes |
| C. | allocating main memory for an executing process |
| D. | all of these |
| Answer» E. | |
| 76. |
Which is the carrect command to list files& folders in unix |
| A. | list |
| B. | ls |
| C. | dir |
| D. | list files |
| Answer» C. dir | |
| 77. |
The kernel itself is a program that usually lives in the root partition of the UNIX filesystem. Most Linux distributions call it and it often a symbolic link to the real kernel file which lives in “/boot”. |
| A. | /vmlinuz |
| B. | /kernel |
| C. | /root |
| D. | none |
| Answer» B. /kernel | |
| 78. |
Every file in unix has ….. |
| A. | two inode |
| B. | one inode |
| C. | no inode |
| D. | none |
| Answer» C. no inode | |
| 79. |
What is the output of the following program? x = 3; y = 5; z = 10;if [( $x -eq 3 ) -a ( $y -eq 5 -o $z -eq 10 )] thenecho $x elseecho $yfi |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | error |
| Answer» C. 5 | |
| 80. |
The Newly created files are ………….. of the file system directory structure. |
| A. | main nodes |
| B. | root nodes |
| C. | leaf nodes |
| D. | middle nodes |
| Answer» D. middle nodes | |
| 81. |
The following commands gives the output like this #cat file1 file2#cat: file1: No such file or directory helloIf we execute the command “cat file1 file2 1>2 2>&1” the output would be |
| A. | cat: file1: no such file or directory hello |
| B. | no output is displayed |
| C. | cat: 1>2: no such file or directory |
| D. | hello |
| Answer» C. cat: 1>2: no such file or directory | |
| 82. |
File discriptor programs uses………………... |
| A. | to delete file |
| B. | to save file |
| C. | for subsequent references for file |
| D. | none of these |
| Answer» D. none of these | |
| 83. |
fork system call….. |
| A. | control the size of memory allocated to a process |
| B. | create a new process |
| C. | overlay image of a program onto the running process |
| D. | finish executing a process |
| Answer» C. overlay image of a program onto the running process | |
| 84. |
Program such as Shell and editors interact with kernel by invoking ………. |
| A. | process |
| B. | thread |
| C. | system calls |
| D. | none of these |
| Answer» D. none of these | |
| 85. |
ode 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)o/p: |
| A. | 12378 |
| B. | 123(newline)8(new line) |
| C. | 123(newline)78(ne wline) |
| D. | 45678(newline)1 23(newline) |
| Answer» C. 123(newline)78(ne wline) | |
| 86. |
LILO can be installed to either ……..of Linux root partition. |
| A. | mbr |
| B. | to the boot record |
| C. | both a and b |
| D. | none |
| Answer» D. none | |
| 87. |
Access permission can be set to ………… |
| A. | the file owner |
| B. | a file group |
| C. | everyone else |
| D. | all of these |
| Answer» E. | |
| 88. |
The file subsystem accesses file data using a buffering mechanism that regulates …. |
| A. | data flow between the kernel and secondary storage devices. |
| B. | data flow between secondary storage devices to kernel |
| C. | data flow of kernel |
| D. | none |
| Answer» B. data flow between secondary storage devices to kernel | |
| 89. |
script is run for successful login |
| A. | /etc/profile |
| B. | /etc/str |
| C. | /etc/strtms |
| D. | /etc/.conf |
| Answer» B. /etc/str | |
| 90. |
The commonly used UNIX commands like date, ls, cat, etc. are stored in……….. |
| A. | /dev directory |
| B. | /bin and /usr/bin directories |
| C. | /tmp directory |
| D. | /unix directory |
| Answer» C. /tmp directory | |
| 91. |
The shell acts as an interface between the……….. |
| A. | user and kernel |
| B. | user and operating system |
| C. | kernel and operating system |
| D. | none of these |
| Answer» B. user and operating system | |
| 92. |
when the kernel services an intrrupt, it blocks out low priority interrupts but……….. |
| A. | services middle priority interrupt |
| B. | services higher priority interrupts |
| C. | both a and b |
| D. | none of these |
| Answer» C. both a and b | |
| 93. |
All system calls return ……..if open or create call fails |
| A. | -2 |
| B. | 0 |
| C. | 1 |
| D. | -1 |
| Answer» E. | |
| 94. |
When a process executes a system call, the execution mode of the process changes from ……….. |
| A. | kernel mode to user mode |
| B. | user mode to kernel mode |
| C. | user mode to operating system mode |
| D. | none of these |
| Answer» C. user mode to operating system mode | |
| 95. |
The Hardware at centre of UNIX system provides…………. |
| A. | basic services |
| B. | operating system with basic services |
| C. | kernel service |
| D. | none of these |
| Answer» C. kernel service | |
| 96. |
Unix system treats devices as a …….. |
| A. | hardware |
| B. | file |
| C. | byte |
| D. | none of these |
| Answer» C. byte | |
| 97. |
After the kernel is brought in from disk into main memory, it begins execution and one of the first things it does is ………… |
| A. | initialize the system\s kernel |
| B. | initialize the system’s hardware. |
| C. | initialize the system\s ram |
| D. | none |
| Answer» C. initialize the system\s ram | |
| 98. |
Which command is used to locate all the.profile files in the system? |
| A. | ls profile |
| B. | find /-name profile print |
| C. | cd /.profile |
| D. | l -u .profile |
| Answer» C. cd /.profile | |
| 99. |
Consider the program main ( ){printf("He arose a victor from\n"); system ("date") ;printf("the dark domain");}If a.out is the executable code corresponding to the above source code, then the command a.out > out f |
| A. | redirects the output of date to file out f |
| B. | displays the output of date on the screen |
| C. | prints everything on the screen |
| D. | prints the two messages on the screen |
| Answer» B. displays the output of date on the screen | |
| 100. |
The child process invoke …….to execute program copy . |
| A. | fork |
| B. | execl |
| C. | wait |
| D. | printf |
| Answer» C. wait | |