This is the computer science questions and answers section on "Unix" with download Computer Science Unix quiz questions with answers as PDF files and eBooks. Unix Interview Questions and Answers (objective type, multiple choice )?. UNIX mcq questions answers can be used for the preparation of National Eligibility Test (NET) and State Eligibility Test (SET). You can download UNIX mcq pdf. QUESTION BANK. MULTIPLE CHOICE QUESTIONS. UNIT 1. 1. In UNIX resources are shared by all the users, so UNIX is_____________ System. A. multiuser.
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Unix Multiple Choice Questions and Answers Pdf Free Download for Freshers Experienced CSE IT Students. Unix Objective Questions Mcqs. This set of Unix Multiple Choice Questions & Answers focuses on “Shell Programming using read Command and Command Line Arguments”. UNIX command Questions Answers asked in Interview. UNIX or Linux operating system has become default Server operating system and for whichever.
Suppose your FTP Server is hacked and the entire server needs to be restored. How should you restore the original kernel system files? You cannot restore the entire operating system from tape backup device. So you should reinstall the core operating system, and then restore system configuration files and user data from tape backup device. Why should you avoid Telnet to administer a Linux system remotely?
Telnet uses most insecure method for communication.
It sends data across the network in plain text format and anybody can easily find out the password using the network tool. In the case of Telnet, these include the passing of login credentials in plain text, which means anyone running a sniffer on your network can find the information he needs to take control of a device in a few seconds by eavesdropping on a Telnet login session. What is Puppet Server?
Puppet is an IT automation software that is used to push configuration to its clients puppet agents using code. Puppet code can do multiple tasks from installing new software to checking file permissions to updating user accounts. What is the difference between Cron and Anacron?
Minimum granularity with Cron is minute while it is in days with Anacron. Cron job can be scheduled by any normal user while Anacron can be scheduled only by the super user the superuser is a special user account used for system administration.
Unix - Filters and Commands
In case of Anacron, if a job is scheduled and the system is down that time, it will execute the job as soon as the system is up and running.
Cron is ideal for servers while Anacron is ideal for desktops and laptops. Cron should be used when you want a job to be executed at a particular hour and minute while Anacron should be used in when the job can be executed irrespective of the hour and minute. Each user has a defined quota in Linux.
This is done mainly for the security as some users have only limited access to files. This provides a security to the files from unwanted access. The quota can be given to a single user or to a group of users.
What is the name and path of the main system log? This file contains all the messages and the script written by the user. Search Google Answer: SF and CF b.
AF and CF c. All flags d. No flag is set.
Why Computer Science Unix?
Kernel b. Bus c. Shell d. Linux operating system uses a. Affinity Scheduling b. Fair Preemptive Scheduling c. Hand Shaking d. Fair Preemptive Scheduling. In Unix, how do you check that two given strings a and b are equal? The directory structure used in Unix file system is called a.
Hierarchical directory b.
Tree structured directory c. Directed acyclic graph d.
Hierarchical directory. Process 0 is called init process b. The easiest way to do it will be by using [sed].
We already know how [sed] can be used to delete a certain line from the output — by using the'd' switch. It does not really change the file in-place. So if you want to delete the first line from the file itself, you have two options.
How to remove certain lines from a file in Unix? How to remove the last n-th line from a file? This is bit tricky. Suppose your file contains lines and you want to remove the last 5 lines.
Unix / Linux Questions and Answers
In that case there are many different ways to solve the problem. There are some ways which are quite complex and fancy. But let's first do it in a way that we can understand easily and remember easily.
The second command after the semi-colon , uses the variable and works in the exact way as shown in the previous example. How to check the length of any line in a file?
Now once you know it, it is easy to print out the length of this line by using [wc] command with '-c' switch. How to get the nth word of a line in Unix? Assuming the words in the line are separated by space, we can use the [cut] command. If the separator was comma, we could have written -d',' then. How to reverse a string in unix? Pretty easy.Up one directory D. What command would you use?
What is the difference between Cron and Anacron? So you only see the remaining line which is the 1st line. There are some ways which are quite complex and fancy. It is easier to locate the related classes. Microbiology Biochemistry Biotechnology Biochemical Engineering. How to zip a file in Linux?
Locating Linux kernel. This program look for a certain pattern in a file or list of files and only those lines are displayed on the output screen which contains the given pattern.
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