Linux/Unix Solved MCQs

The advantage of binary files over text files is that It is compact It can be accessed faster Many commands assume the named file to be a binary file They are more reliable       _____________________________________________________________________________________
UNIX was developed by Bell labs Berkley software California university American defence academy       _____________________________________________________________________________________
Mounting a file system results in the loading of Boot block Super block i-node table All of these       _____________________________________________________________________________________
Profilers are Tools that analyze the run time behavior of a program Tools that check C code for cross file consistency Tools that keep track of evolving versions of a file None of the above       _____________________________________________________________________________________
Which command is used to extract specific columns from the file? cut grep Past cat       _____________________________________________________________________________________
Which of the following system calls,does not return control to the calling point, on termination? Fork Exec Ioct1 Longjmp       _____________________________________________________________________________________
The Unix command used to find out the number of characters in a file is nc wc chcnt c       _____________________________________________________________________________________
Which command is used to display the characteristics of a process? pid ps du au       _____________________________________________________________________________________
The command that can be used to restrict incoming messages to a user is Mesg Halt Grep Sleep       _____________________________________________________________________________________
Which command is used to remove a file Rename MV RM Del       _____________________________________________________________________________________
When a process makes a system call ,its mode changes from User to kernel Kernel to user Restricted to unrestricted Unrestricted to restricted       _____________________________________________________________________________________
Which of the following file names can be found in more than one directory? Passwd Bin Date None of the above       _____________________________________________________________________________________
Which of the following are not system calls? Chmod Open Lseek Getc       _____________________________________________________________________________________
Which of the following files contains information related to password aging? Shadow Profile Password All of these       _____________________________________________________________________________________
Environment variables can be accessed by System programs C programs Shell scripts None of the above       _____________________________________________________________________________________
Which of the following system calls transforms an executable binary file into a process? Fork Exec Ioct1 Longjmp       _____________________________________________________________________________________
Which command allows you to view your file 24 lines at a time ? More Cat Pg None of the above       _____________________________________________________________________________________
Which of the following keys is used to replace a single character with new text? S s r C       _____________________________________________________________________________________
Which command will be used with vi editor to append text at end of line? A i a I       _____________________________________________________________________________________
An attempt to read from locked file,results in Prematured termination A deadlock An indefinite wait None of the above       _____________________________________________________________________________________
The tail command in UNIX Can be used to look at the tail or bottom of the file Can be used to display the list of last 10 files in the current directory Can be used to display the list of last 15 in the current directory None of the above       _____________________________________________________________________________________
Which command is used to display the device name of the terminal you are using? who ls tty stty       _____________________________________________________________________________________
Which of the following shell scripts looping features does not recognize the break command? While Until For None of the above       _____________________________________________________________________________________
Kernel is not involved When a read operation is done When a pressed key is echoed on to the screen In resource allocation None of the above       _____________________________________________________________________________________
The file that stores an integer as a sequence of characters is a Text file Data file Binary file Core       _____________________________________________________________________________________
Which of the following command the file names in multiple columns? IS–X IS IS–1 IS–f–X       _____________________________________________________________________________________
Which of the following is not a communication command? Write Mail Mesg Grep       _____________________________________________________________________________________
The sort command in UNIX Used to sort a file Used to sort the list of files in a directory Both A and B None of the above       _____________________________________________________________________________________
Which of the following changes permission to deny write permission to group and others? Chmod go-w filex Chmod go w filex Chmod go=w file None of the above       _____________________________________________________________________________________
Which command is used to create a directory? CRDIR MKDIR MD CR       _____________________________________________________________________________________
Which one of the following options is not a shell in UNIX system? Bourne Shell C Shell Net Shell Korn Shell       _____________________________________________________________________________________
Which of the following tools can be used to keep track of evolving version of a file? Make Yacc SCCS dv       _____________________________________________________________________________________
Which of the following commands is used to count the total number of lines,words and characters contained in a file? count p wcount wc count w       _____________________________________________________________________________________
Which of the following statement best explains a process? It is a program. It is a program in execution. It is an instance of a program in execution. It is a program that uses system calls.       _____________________________________________________________________________________
Files that can store data in the same format as used in program are called Binary files Source file Text file Core       _____________________________________________________________________________________
Which of the following sections of an executable binary file has all uninitialized data items? BSS Data Header Symbol       _____________________________________________________________________________________
Shell functions Are another name for shell procedures Execute faster than shell procedures Are executed by a new shell Are not executed by new shell       _____________________________________________________________________________________
Command_________compares two files byte by byte and displays the first mismatch. cmp comp cmap None of these       _____________________________________________________________________________________
Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3? chmod 777 emp* chmod u x emp[l-3] chmod u r ??? emp chmod 222 emp?       _____________________________________________________________________________________
Which of the following commands is used for an automatic remainder service? Write Calender Mail Mesg       _____________________________________________________________________________________
In which section of a process,the information about the arguments to the program are available? Data Text Stack User block       _____________________________________________________________________________________
If cat x ,prints garbage ,then x is probably a Data file Binary file Text file Source file       _____________________________________________________________________________________
Which of the following calls never returns an error? Getpid Fork Ioct1 Open       _____________________________________________________________________________________
The tar command in UNIX Used to create compressed archives of directories and files Used to extract directories and files from an archives Both A and B None of the above       _____________________________________________________________________________________
Which command is used to display a file contents in octal form? cd of od oct       _____________________________________________________________________________________
To allow only one user to work with a particular file at a particular time ,one has to Semaphore Critical region Locking Dedicated mode       _____________________________________________________________________________________
Which command is used with vi editor to delete a single character? Z y a x       _____________________________________________________________________________________
The cat command is used to Print a file Display a file Capture a file Copy a file       _____________________________________________________________________________________
Which command is used with vi editor to move the cursor to the left? i k j h       _____________________________________________________________________________________
Which of the following is not a filter? cat wc grep sort       _____________________________________________________________________________________