Sunday, July 12, 2015

1 LINUX INTERVIEW QUESTIONS AND ANSWERS - 2015



I'm preparing this SEO interview questions which has been asked yesterday in TCS. The below mentioned SEO interview questions is more then enough to crack any type of SEO interview  - Tazeen Zehra



SEO Interview Questions from TCS on 13-July-2015
- See more at: http://tazeenzehra.blogspot.in/2015/07/seo-interview-questions-and-answers-2015.html#sthash.uYqp0pvS.dpuf

I'm preparing this SEO interview questions which has been asked yesterday in TCS. The below mentioned SEO interview questions is more then enough to crack any type of SEO interview  - Tazeen Zehra



SEO Interview Questions from TCS on 13-July-2015
- See more at: http://tazeenzehra.blogspot.in/2015/07/seo-interview-questions-and-answers-2015.html#sthash.uYqp0pvS.dpuf

I'm preparing this SEO interview questions which has been asked yesterday in TCS. The below mentioned SEO interview questions is more then enough to crack any type of SEO interview  - Tazeen Zehra



SEO Interview Questions from TCS on 13-July-2015
- See more at: http://tazeenzehra.blogspot.in/2015/07/seo-interview-questions-and-answers-2015.html#sthash.uYqp0pvS.dpuf

I'm preparing this SEO interview questions which has been asked yesterday in TCS. The below mentioned SEO interview questions is more then enough to crack any type of SEO interview  - Tazeen Zehra



SEO Interview Questions from TCS on 13-July-2015
- See more at: http://tazeenzehra.blogspot.in/2015/07/seo-interview-questions-and-answers-2015.html#sthash.uYqp0pvS.dpuf

I'm preparing this Linux interview questions which has been asked yesterday in Wipro for my friend who was attending for Linux Administrator. knowledge on below mentioned Linux interview questions  is required to crack any type of Linux interview  - Tazeen Zehra

 
Linux Interview Questions and Answers:

 

Which file have runlevel configuration?

/ect/inittab

What command would you use to shut down the system in 100 seconds?

#shutdown -h 100

What daemon controls the print spooling process?

The Line Printing Daemon (lpd) controls the print spooling process.

What configuration file defines the default runlevel for the init process?


/etc/inittab file defines the default runlevel for the init process.

Which command can you use to shut down and halt a Linux System?

The halt command will shut down a Linux system without rebooting

What init level should you set to bring the system to single-user mode?

init 1 will bring the system to single-user mode

A user wants to restart the NFS server because they want to enable changes made in the configuration file. What command accomplishes this task?

#service nfs reload

The reload command will tell the system to stop the service, reload the configuration file, and restart the service

What command can you use to reboot a Linux system?

The command to reboot a Linux system is reboot

What mode must you be in when using vi editor to input text into a file?

To insert text in the vi editor, you must be in insert mode
What runlevel does init 1 represent?

init 1 represents runlevel1.Runlevel 1 is used for single user mode.

One user from your company left the job without telling root account password of his system. To reset root password, in which mode you need to boot the system?

To reset the root password, we need to boot the system in single user mode.

What runlevel does init 2 represent?

init2 represents rulevel 2. runlevel 2 is used for multiuser without networking.

Some users are complaining that the DHCP server is not running. After examine the running processes on the system, you notice that the process is not present. What command should you use to start the DHCP service?

Because the service is currently not running, use the start command

#service dhcpd start
 

What runlevel does init 5 represent?

Runlevel 5 is used to boot up a full multiuser system and to automatically start X-windows. 

What tar argument is used to extract files from an archive?

To extract files from an archive, use the -x argument in the tar command.

 
What init runlevel should be set to shut down and reboot the system?

init runlevel 6 is used to shut down and reboot the system

 
What command would you use to add the user name vickey?
#useradd vickey

This command will add the user viceky with default options. But this will not be able to login in system until you set a password for it. To set password use following command

#passwd vickey
 

Which runlevel currently not is used ?

Runlevel 4 is not used.

 
Your company hired a new developer for temporary periods to speed up the ongoing project. You are tasked to create a new user account which should be disabled automatically on 5 may 2014. How would you do that?

Use -e option with useradd command. -e option allows you to set the date on which the user account will be disabled. The date is specified in the format YYYY-MM-DD. Following command will do the assigned task

#useradd -e 2014-05-05

 
Which command should you use to change the user information listed form finger command?

chfn command is used to change the information listed from finger command.
What runlevel does init 6 represent?

Runlevel 6 is used to reboot the system.

You are tasked to delete a user account with all his associated files including his home directory and mail folder. How will you do that ?

#userdel -r [username]

Above command will delete user account as well all his associated files including his home directory and mail folder.

A user comes to you and complain that his system was starting fine in GUI mode, but from last reboot system is starting in command line interface. What is the most likely cause of the problem?

In the /etc/inittab file, the default runlevel is probably set to 3, which tells it to start the system in command line.

What files are updated when adding a group?
/etc/group and /etc/gshadow files contains group information in Linux system. So these files would be updated every time whenever new group is added.
 

What command is used to delete a group?

The groupdel command will delete a group.
 

What runlevel does init 3 represent?

init3 represents rulevel 3. runlevel 3 is used for multiuser with networking.

 
What command will display the directory path that is currently in use?

pwd command will display the directory path that is currently in use.

 
A user type 'cd ~ ' on command prompt, what this command will do?

This command will move user to his or her home directory. ~ represents home directory in Linux.

 
A user comes to you and complain that his system start fine, but as soon as it is almost loaded it reboot again. What is the most likely cause of the problem?

In the /etc/inittab file, the default runlevel is probably set to 6, which tells it to reboot right after the system has started.

 
Which command will list all the files and sub-directories in a directory and include the access rights?

ls -l command will list all the files and sub-directories in a directory and include the access rights.

 
Which command will list all the files in a directory including hidden files?
ls -a command will list all the files in a directory including hidden files.

 
What is the correct syntax for the move command?

The correct syntax for the move command is

mv [options] [source] [destination]

 
Which character option with chmod command allows the execute-only permission if the file is a directory?

The x option is used to allow execute only if the file is a directory.

 
How will you display confirmation of the change of ownership of a file from rhuser1 to rhuser2?
Use --verbose option with chown command. For example

#chown --verbose rhuser2 /tmp/testfile
 

Which command is used to un-mount a DVD?

Use umount command to un-mount the DVD or CD or any other mounted media.
What runlevel does init 0 represent?

Runlevel 0 is used to halt /shutdown the system.

 
Which command will display the total size of all files, without listing the files, in a user's home directory?

The command du -c -s /home/user will display the total size of all files, without listing the files

 
Which command will display the available space of each partition in megabytes (MB)?

The command df -m will display the available space of each partition in MB.

 
Hard drive in your system is full and you want new hard drive. However sales department would not approve the expenditure without proof. Which tool would you use get a proof?

Use df command to justify the available free space in hard disk.

 

A user comes to you and complain that his system start fine, but as soon as it is almost loaded it shuts down again. What is the most likely cause of the problem?

In the /etc/inittab file, the default runlevel is probably set to 0, which tells it to shutdown right after the system has started.
Read More


0 SEO INTERVIEW QUESTIONS AND ANSWERS -2015


I'm preparing this SEO interview questions which has been asked yesterday in TCS. The below mentioned SEO interview questions is more then enough to crack any type of SEO interview  - Tazeen Zehra



SEO Interview Questions from TCS on 13-July-2015


1) What is SEO?
 
SEO means SEARCH ENGINE OPTIMIZATION and it is used for changing the position of the website or web page in the results of search engine by using phrases or keywords.
 
There are two types of Search Engine Optimization:
 On Page Optimization and
 Off Page Optimization.
 
2) What is On Page Optimization?

On page optimization refers to measure the factors that can take directly within the website and effects on your webpage or website in search results which improves the position of the search rankings. Examples for on page optimization include HTML code, Meta tags, keyword density and keyword placement.
 
3) What is Off Page Optimization?

Off page optimization refers to measure the factors that if your webpage or website having any effect listing in the normal search results. This comes under offsite which they cannot be controlled by coding on the page or by you. Examples for the off page optimization are page rank and link popularity.
 
4) What is White Hat SEO?

In SEO terminology, White hat search engine optimization refers to the use of techniques, optimization strategies, and tactics that are focused on human audience and completely follow the policies and rules of search engine.
 
5) What is Black Hat SEO?

In SEO terminology, Black Hat search engine optimization refers to usage of aggressive search engine optimization strategies, tactics, and techniques only focuses on search engines but not on audience, and they don’t perform the guidelines of search engines.
 
6) What is Meta Title?

Meta title is a title tags and it is very essential in Search engine optimization and the characters of the title should be in between 20-70, it should contain or include correct and keyword which Is most important. Title tags tell about contents on webpage. Search engine tells the user about the information in the page through title tags.
 
7) What is Meta Description?

Meta description is XHTML and HTML element which describes the page to search engines. The real importance of the data in the Meta description has depreciated; this plays an important role in search engine optimization rankings.
 
8) What is 301 Redirect?

Changing the URL of a page when the results are shown in the search engine, we suggest you to use 301 redirect server-sides. This is one of the good ways to guard the search engines and users are taken to the correct page. The status code 301 means the page is completely moved to new location.
 
9) What is 404 Error?

HTTP ERROR 404 not found means that a webpage you are trying to open is not found on the server. It comes under a client-side error which it means either moving or removing the page and not changing the URL accordingly, or typing a URL incorrectly.
 
10) What is Canonical tag?

Canonical tag is a HTML element which helps webmasters from preventing duplicate content issued by identifying clearly and definitely the canonical or recommended version of a page in web as a part of SEO.
 
11) What is Penguin Update?

Penguin update is launched by Google in April 2012 to catch the sites which are deemed to be spamming when searching the results, particularly those who were obtaining networks through links or buying links which are wontedly designed to get the best rank in Google rankings.
 
12) What is Hummingbird update?

Since 2001 the Hummingbird was the best and the ambitious update in the adjustments of search algorithm in Google and the first update is “caffeine” update of 2010. Google started using humming bird update from 2013. This is used to adjust and judge the content and it will pay more attention and concentrate to each word in query.
 
13) What is Panda Update?

Google panda was first released in the year 2011 and it is used to change the ranking algorithm results in Google. It is aimed to change the rank of the ‘thin sites and low quality sites’, and shows near higher quality sites.
 
14) What is keyword Density?

Keyword density means the number of times a phrase or keyword is repeated or appears on the page comparing with the total and other number of keywords on the page. In SEO context we can determine if a webpage is relevant to the specified keyword or keyword phrase.
 
15) What is bounce rate?

Bounce rate is used to measure the number of visitors visiting or viewing only one page within your website. Bounce rate is based on the start of the session’s page. Some visitors only view a single page and then exit on the same page. High bounce rate indicates the landing page is not perfectly relevant to the visitor. Low bounce rate indicates landing page provides accurate information and the keywords used in it are very useful for the visitors.
 
16) What is Exit Rate?

Exit rate is the word used in the analysis of web site traffic. For all the views in a page exit rate is the percentage for the last in the session. In financial term it also refers to cost or revenue for a fiscal period for performing in the present time. If used in content of revenue, this refers to income expected in the following period of a time.
 
17) What is Site Map?

Sitemap means if a list of pages in a website which is accessible for the users and crawlers. Site map have to contain a page list of your website that should be indexed by search engines. It can even be in the type of a document or in any kind of form by planning tool and web design on a web site, organized in the hierarchical fashion.
 
18) What is Robot.txt?

Robot.txt commands robot search engine by restricting or allowing to pages and selected folders of your website. This has huge impact on indexing a correct page in the results of search engine. Assure that your website is containing robots.txt which is valid.
 
19) What is Landing Page?

In the proper way landing page means a web page that a visitor arrives or lands on a page. Landing page is more common in the realm of advertising and marketing, referring a landing page in the web page is most distinct. Landing should use to be guide or guidance for the visitor who is visiting your web page or website towards conversion goal.
 
20) What is Googlebot?

Collecting the information about Webpage by using an agent called googlebot. Googlebot is also called as spider. The work of googlebot is crawling the webpage content, URL’s, and fetching the data from the pages.


Read More


Wednesday, May 20, 2015

0 Labview Interview Question

Recently my friend asked me to prepare Labview for an interview. The below interview questions I prepared for Labview, and my Labview Interview went well.

1 Is LabVIEW a compiled programming language?
 
2 Can LabVIEW be integrated into existing software engineering practices?
 
3 Do LabVIEW VIs work with source code control providers?  

4 Can I merge LabVIEW VIs?
 
5 How can I determine what modifications were made to a VI?
 
6 How do I validate a LabVIEW application?
 
 7 Can I map requirements to LabVIEW code?
 
 8 How do I document graphical code?
 
9 How do I perform static code analysis on LabVIEW VIs?
 
10 What assurance do I have that LabVIEW is a high-quality software product?
 
11 What is the Front Panel?
 
12 What is the Block Diagram?
 
13 What is Wires?
 
14 What is a Shift Register?
 
15 What is a Formula Node?
 
16 Which Company is the vendor of the LabVIEW software?
 
 17 What kind of Programming concept is used in LabVIEW?
 
18 What is a State Machine?
 
19 What is a Case Structure?
 
20 What is the hardest thing you've done with LabVIEW?
 
21 What is an insane object? How do you deal wth it?
 
22 Relative adantages/disadvantages of enum vs. text ring
 
23 What is a functional global? Describe how it works to store data.
 
24 What is a memory leak? Describe a process for detecting one.
Read More


Friday, May 15, 2015

0 PowerCenter Domain



In its simple terms, Domain can be defined as an environment. You will

have a PowerCenter domain for each environment. For example, if you have

Development, Test and Production environments, you essentially create 3

different domains – one for each environment. Domain information is stored in

a set of tables, which are created and configured as part of PowerCenter

server installation. These domain tables store metadata related to services

within the PowerCenter, users, groups, etc…
Read More


Tuesday, May 5, 2015

0 Grid in Informatica 9.6









A grid is a collection of nodes. A PowerCenter Integration Service can run


upon an individual node or on a grid. When an Integration Service runs on a


grid, it automatically load balances the workflows that it is executing,such that


the resources (nodes) are optimally utilized. When a node in the domain fails,


integration service can be configured to failover the workflows running on that


node to another node(s) to provide a seamless failover of the jobs.
Read More


Friday, May 1, 2015

0 Informatica Node



A node is a machine participating in the Informatica Domain. Typically, a

node consists of CPU, Memory and Disk. A node can be active or passive

depending on the services it is hosting. Informatica domain can consist

of more than one node. These nodes can host a wide variety of operating 


systems such Windows, Linux, HP-UX, etc. Informatica server software is installed on each node participating in a domain.
Read More


0 PowerCenter Repository Service (PCRS)



A PowerCenter Repository is a set of tables created when your Informatica Administrator creates a 


PowerCenter Repository Service during post installation process. The entire code that a developer 

builds is stored inside the repository. Repository contains hundreds of tables, whereas PowerCenter

stores the developer's code within these tables very intelligently. It is hard to  manually look at these


 tables and comprehend and hence, they should be left  alone unless there is a dire need to look at t

them. Along with developer's code, repository also contains metadata like definitions of the tables used

 by the mappings, source and target connections, etc… When the developer runs a Workflow (a job in 

PowerCenter), its information is fetched from the repository. Thereafter, the runtime  statistics are 

stored back in the repository again. Hence the repository is a key and live element in PowerCenter 

architecture
Read More


0 Informatica Vibe virtual data machine



Informatica's Vibe Virtual data machine allows the users to "map (code)

once and deploy anywhere". Powered by Vibe, Informatica PowerCenter

mappings are deployed on premise for enterprise data integration. They can be

deployed to Informatica Cloud, Informatica Data Quality (developer tool) or

even to cutting edge Hadoop platform, with few exceptions
Read More


Wednesday, April 29, 2015

0 Installing Informatica clients






Informatica client installer is a consolidated installation that is

used to install more than just PowerCenter. At the time of writing this

book, Informatica client installer is used to install:

® PowerCenter clients

® Developer client

® B2B Data Transformation client

While the scope of this book is just PowerCenter, due to its relative

simplicity, this part of book will also discuss installation of the other 2 clients

as well.

Read More


0 Introduction to PowerCenter



PowerCenter is a Data Integration engine that can perform high speed data

extraction, transformation and loading. Its rich GUI based Integrated

Development Environment allows rapid development with minimal code.

PowerCenter has an extensive transformation language and its code does not

need to be compiled. Using vibe virtual data machine underneath, 

PowerCenter  allows universal data access. In other words, a mapping can be 

written to  access one data store and can be modified to access another data 

store  without affecting rest of the logic.
Read More