Basic Job Interview Answers
- 15 Interview Questions on Linux "ls" Command - Part 1
- What are the 10 most common interview questions and answers
- 10 MySQL Database Interview Questions for Beginners and Intermediates
- What are the top 10 interview questions and answers
Answer: First we need to know postfix was installed by what package. Find the package name that installed postfix using options -e erase/uninstall a package) and – v (verbose output). # rpm -qa postfix* postfix-2. 10. 1-6. x86_64 and then remove postfix as: # rpm -ev postfix-2. x86_64 Preparing packages... postfix-2:3. 0. 1-2. fc22. x86_64 5. Get detailed information about an installed package, means information like Version, Release, Install Date, Size, Summary and a brief description. Answer: We can get detailed information about an installed package by using option -qa with rpm followed by package name. For example to find details of package openssh, all I need to do is: # rpm -qa openssh [ [email protected] tecmint]# rpm -qi openssh Name: openssh Version: 6. 8p1 Release: 5. fc22 Architecture: x86_64 Install Date: Thursday 28 May 2015 12:34:50 PM IST Group: Applications/Internet Size: 1542057 License: BSD.... Pages: 1 2 3 If You Appreciate What We Do Here On TecMint, You Should Consider: TecMint is the fastest growing and most trusted community site for any kind of Linux Articles, Guides and Books on the web.
15 Interview Questions on Linux "ls" Command - Part 1
What are the 10 most common interview questions and answers
What this means is that updates are mandatory on those systems, while Pro users have eight months that they can delay updates for. Home systems don't support BitLocker or Group Policy Management, as well as several other (mostly business) related features such as Remote Desktop, Domain Join or Enterprise Mode. 8. What are the core new features of Windows 10? Windows 10 ships with several new features and changes. Here is a short selection of important features or changes: The operating system uses a regular Start Menu that combines the functionality of Windows 7 with the start screen of Windows 8. It features live tiles (which you can remove). Cortana, the personal voice-controlled assistant is integrated in Windows 10. DirectX 12 will be a Windows 10 exclusive Microsoft Edge, the company's new web browser, will be Windows 10 exclusive and the default browser on the system. Biometric support (Windows Hello) for authentication. Virtual desktop support. New notification center. Improved command prompt.
MAN stands for Metropolitan Area Network. MAN is the connection of loads of devices which spans to Large cities over a wide Geographical Area. WAN stands for Wide Area Network. WAN connects devices, phones, printers, scanners, etc over a very wide geographical location which may range to connect cities, countries and ever continents. GAN stands for Global Area Network. GAN connects mobiles across the globe using satellites. 5. What is POP3? Ans: POP3 stands for Post Office Protocol Version3 (Current Version). POP is a protocol which listens on port 110 and is responsible for accessing the mail service on a client machine. POP3 works in two modes – Delete Mode and Keep Mode. Delete Mode: A mail is deleted from the mailbox after successful retrieval. Keep Mode: The Mail remains Intact in the mailbox after successful retrieval. 6. What is the criteria to check the network reliability? Ans: A network Reliability is measured on following factors. Downtime: The time it takes to recover. Failure Frequency: The frequency when it fails to work the way it is intended.
10 MySQL Database Interview Questions for Beginners and Intermediates
The syslogd application is very useful in troubleshooting Linux sytems. A sample log file looks similar to below. syslongd 3. How will you restrict IP so that the restricted IP's may not use the FTP Server? Answer: We can block suspicious IP by integrating tcp_wrapper. We need to enable the parameter "tcp_wrapper=YES" in the configuration file at '/etc/'. And then add the suspicious IP in the '' file at location '/etc/'. Block IP Address Open '/etc/' file. # vi /etc/ Add the IP address that you want to block at the bottom of the file. # # This file contains access rules which are used to # deny connections to network services that either use # the tcp_wrappers library or that have been # started through a tcp_wrappers-enabled xinetd. # The rules in this file can also be set up in # /etc/ with a 'deny' option instead. # See 'man 5 hosts_options' and 'man 5 hosts_access' # for information on rule syntax. # See 'man tcpd' for information on tcp_wrappers vsftpd:172. 16. 1 4. Tell us the difference between Telnet and SSH?
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mysql> use Tecmint; Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed mysql> select VERSION(), DATABASE(); | 5. 1 | tecmint | 1 row in set (0. 00 sec) 2. USE NOT Operator (! ) to select all the users except 'SAM' from a table say 'Tecmint' Ans: The below statement will show all the columns of all the users from table ' Tecmint ' except the user ' SAM '. mysql> SELECT * FROM Tecmint WHERE user! =SAM; +---------------------+---------+---------+---------+---------+-------+ | date | user | host | root | local | size | | 2001-05-14 14:42:21 | Anthony | venus | barb | venus | 98151 | | 2001-05-15 08:50:57 | TIM | venus | phil | venus | 978 | 3. Is it possible to implement 'AND' with NOT (! ) Operator. Ans: The AND operator is used when we use (=) and the operator OR is used when we use (! =). An example of (=) with AND Operator. mysql> SELECT * FROM mail WHERE user = SAM AND root = phil An Example of (!