Linux MCQs with answers Page - 51

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Q. If you are a root user, how can you grand execute permission only for the owner of the file project1?

  • (A) chmod U+X project1
  • (B) chmod a+x project1
  • (C) chmod u+x project1
  • (D) chmod +x project1

A

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Q. A user executes the following command successfully: $ chmod +x file1.txt Which of the following is true of the output of this command?

  • (A) The command results in adding execute permission for all users (i.e., user,group & others)
  • (B) The command results in an error since the file is not an executable file
  • (C) The command results in adding execute permission for the owner of the file
  • (D) The command results in adding execute permission to the user who ran this command

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Q. What does chmod +t do?

  • (A) set the sticky bit
  • (B) set effective groupid for filename
  • (C) set effective userid for filename
  • (D) wrong syntax

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Q. Which of the following umask settings allow execute permission to be
set by default on regular files

  • (A) 000
  • (B) 111
  • (C) 222
  • (D) None of these

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Q. The command chmod 4777 a.out

  • (A) will set the sticky bit of a.out
  • (B) is not a valid command
  • (C) will set the suid bit of a.out only if the command is issued by root
  • (D) will set the suid bit of a.out

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Q. SOCK_STREAM sockets are used by ______ processes.

  • (A) UDP
  • (B) TCP
  • (C) SCTP
  • (D) None of these

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Q. SOCK_DGRAM sockets are used by ______ processes.

  • (A) UDP
  • (B) TCP
  • (C) SCTP
  • (D) None of these

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Q. An interface is a set of ___________ designed to facilitate interaction between two entities

  • (A) rules
  • (B) programs
  • (C) instructions
  • (D) none of these

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Q. How many types of sockets are there?

  • (A) 2
  • (B) 4
  • (C) 3
  • (D) 5

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Q. If a signal is received by a process, when will it be processed?

  • (A) It is processed in the next time slice given to the process
  • (B) It is processed immediately
  • (C) It is processed when process is switching to kernel mode
  • (D) All of these

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