UNIX/LINUX Solved MCQs-Part 2

Which of the following statements is not true for UNIX Operating System ? Major strength of UNIX Operating System is its open standards which enabled large number of organizations ranging from academicia to industries to participate in its development. UNIX kernel uses modules with well specified interfaces and provides advantages like simplified testing and maintenance of kernel. It has better extensibility as the kernel is not monolithic. UNIX is kernel based operating system with two main components viz. process management subsystem and file management subsystem. All devices are represented as files which simplify the management of I/O devices and files. The directories structure used is directed acyclic graph.       _____________________________________________________________________________________ When the read system call encounters EOF ,it returns  Some positive integer Some negative integer 0 -1       _____________________________________________________________________________________ The exception to the fact that any process in UNIX ,has a parent is  Dev Sh Kernel Login       _____________________________________________________________________________________ Which of the following files contains information related to password aging?  Shadow Profile Password All of these       _____________________________________________________________________________________ Which command is used to remove a directory? rd rmdir dldir rdir       _____________________________________________________________________________________ Which command will be used with vi editor to append text at end of line?  A i a I       _____________________________________________________________________________________ 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       _____________________________________________________________________________________ Lint should be used  Before compilation After compilation To analyze a C code 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 of the following keys is used to replace a single character with new text? S s r C       _____________________________________________________________________________________ Which of the following system calls,does not return control to the calling point, on termination?  Fork Exec Ioct1 Longjmp       _____________________________________________________________________________________ The cc command makes a total of  1 pass 2 pass 4 pass 5 pass       _____________________________________________________________________________________ Which of the following tools can be used to keep track of evolving version of a file?  Make Yacc SCCS dv       _____________________________________________________________________________________ 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       _____________________________________________________________________________________ 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       _____________________________________________________________________________________ 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 command is used to sort the lines of data in a file in reverse order sort sh st sort -r       _____________________________________________________________________________________ Assume that an implementation of Unix operating system uses i-nodes to keep track of data blocks allocated to a file. It supports 12 direct block addresses, one indirect block address and one double indirect block address. The file system has 256 bytes block size and 2 bytes for disk block address. The maximum possible size of a file in this system is 16 MB 16 KB 70 KB 71 KB       _____________________________________________________________________________________ Which command is used to create a directory?  CRDIR MKDIR MD CR       _____________________________________________________________________________________  The Unix command used to find out the number of characters in a file is nc wc chcnt c       _____________________________________________________________________________________ Which command is used to remove a file  Rename MV RM Del       _____________________________________________________________________________________ Which command allows you to view your file 24 lines at a time ? More Cat Pg None of the above       _____________________________________________________________________________________ Which of the following are character special files?  Terminal Printer Modem Tape drive       _____________________________________________________________________________________ Which of the following are not system calls?  Chmod Open Lseek Getc       _____________________________________________________________________________________ Which of the following sections of an executable binary file has all uninitialized data items?  BSS Data Header Symbol       _____________________________________________________________________________________ Which command will be used with vi editor to move back to the beginning of a word?  b e a w       _____________________________________________________________________________________ Which command is used to display the top of the file?  Cat More Head Grep       _____________________________________________________________________________________ Which of the following calls never returns an error?  Getpid Fork Ioct1 Open       _____________________________________________________________________________________ In a system ,if 5 people are currently using vi editor ,then the number of corresponding processes will be 1 5 3 0       _____________________________________________________________________________________ The command that can be used to restrict incoming messages to a user is  Mesg Halt Grep Sleep       _____________________________________________________________________________________ Which command is used to extract specific columns from the file? cut grep Past cat       _____________________________________________________________________________________ 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 commands is used to count the total number of lines,words and characters contained in a file?  count p wcount wc count w       _____________________________________________________________________________________ Which is the earliest and most widely used shell that came with the UNIX system?  C Shell Korn Shell Bourne Shell Smith Shell       _____________________________________________________________________________________ An attempt to read from locked file,results in  Prematured termination A deadlock An indefinite wait None of the above       _____________________________________________________________________________________ Files that can store data in the same format as used in program are called  Binary files Source file Text file Core       _____________________________________________________________________________________ Which set option is used with vi editor to display line numbers on screen?  nm nu ic li       _____________________________________________________________________________________ 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 of the following is not a communication command?  write mail mesg grep       _____________________________________________________________________________________ Which command is used to display the characteristics of a process?  pid ps du au       _____________________________________________________________________________________ Which of the following commands is used to rename a file?  Rename MV Remove Ren       _____________________________________________________________________________________ Which of the following file names can be found in more than one directory?  Passwd Bin Date None of the above       _____________________________________________________________________________________ Command_________compares two files byte by byte and displays the first mismatch.  cmp comp cmap None of these       _____________________________________________________________________________________ Mounting a file system results in the loading of  Boot block Super block i-node table All of these       _____________________________________________________________________________________ Which command is used to display and create files?  cat ed vi lyrix       _____________________________________________________________________________________ UNIX was developed by  Bell labs Berkley software California university American defence academy       _____________________________________________________________________________________ Which command is used with vi editor to move the cursor to the left?  i k j h       _____________________________________________________________________________________ Environment variables can be accessed by  System programs C programs Shell scripts None of the above       _____________________________________________________________________________________ The cat command is used to  Print a file Display a file Capture a file Copy a file