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Some technical interview questions

noreply@blogger.com (Anonymous) — Sun, 07 Feb 2016 14:05:00 +0000

Here are some technical interview questions asked now day's.

1. Which is faster, heap or stack?
Solution : The stack is faster because the access pattern makes it trivial to allocate and deallocate memory from it (a pointer/integer is simply incremented or decremented), while the heap has much more complex bookkeeping involved in an allocation or free. Also, each byte in the stack tends to be reused very frequently which means it tends to be mapped to the processor's cache, making it very fast. Another performance hit for the heap is that the heap, being mostly a global resource, typically has to be multi-threading safe, i.e. each allocation and deallocation needs to be - typically - synchronized with "all" other heap accesses in the program.

2. Which data structure is used in recursion calls? And why?
Solution : Well if you think about it, then you might be wondering that there should be some place where those function calls are stored. And there is some order in which they are called, right...
Yes, the answer is stack data structure. Now think why not queue.

3. Find all possible combination of given string?

4. Which data structure you will use for maintaining companies stock market values?
Solution : We can use hash/dictionary for storing company names/id and Queue data structure for storing stock market values.

5. Given a running stream of integers, you need to find median at any given instance? You need to solve it in O(1)?

6. There is a matrix of 10 X 10 size ( or say 2d array), you need to find numbers which are common in all rows?

7. Find the longest palindrome of any given string?

8. Let say you are storing files on some folder, how can you track/check if same file is already stored while the user is uploading the file?

9. Given an array of size million, it only contains 0's and 1's . How can you sort this array in O(n)?

What Founders & Companies says about different programming languages

noreply@blogger.com (Anonymous) — Tue, 05 Aug 2014 21:00:00 +0000

Let us overview about what founders of different companies says about different programming languages.

Founder : Adam D'Angelo
Company : Quora - It is a question & answer website where questions are created, answered, edited and organized by its community of users.

Source Quora

Read Quote of Adam D'Angelo's answer to Quora Infrastructure: Why did Quora choose Python for its development? on Quora

Founder : Charlie Cheever
Company : Quora - It is a question & answer website where questions are created, answered, edited and organized by its community of users.

Source Quora

Read Quote of Charlie Cheever's answer to Quora Infrastructure: Why did Quora choose Python for its development? on Quora

Company : Dropbox
What company says :

Source HighScalability.com , for more details check this Scalability at Dropbox

Drew Houston at Dropbox DBX

Founders : Jeff Atwood & Joel Spolsky
Company : StackOverflow - Q/A website , specially for developers

Jeff Atwood (Coding Horror) about .net & ruby at Coding Horror

Company : Twitter
Built on Ruby on Rails , but heard they might be changing there stack to Java.
http://techcrunch.com/2008/05/01/twitter-said-to-be-abandoning-ruby-on-rails/

This i found somewhere on internet , which tells about relative runtimes of different programming languages.
Source : Scale at facebook

Reminder service on Google Now

noreply@blogger.com (Anonymous) — Mon, 21 Jul 2014 14:10:00 +0000

Google recently added a reminder service on google now , by just typing - add/create reminder "to buy fruits" , a setting box will open with more options for reminder . This is indeed a very easy & useful feature.

Tips & Tricks for Everday Life

noreply@blogger.com (Anonymous) — Wed, 09 Jul 2014 12:56:00 +0000

Recently , i got the chance to read an amazing post on quora which tells about tips & tricks which we can learn in 10 minutes that could be useful for rest of our life.

Check this out at Tips and Hacks for Everyday Life

Turning Every webpage into PDF

noreply@blogger.com (Anonymous) — Sun, 08 Dec 2013 09:28:00 +0000

Now you can turn every web page into PDF format using a simple chrome app Save as pdf.

In my previous post Making your browser a notepad , you can see that using chrome , we can also save any webpage into PDF easily.

Making your T.V Smart with $35 using Chromecast

noreply@blogger.com (Anonymous) — Sat, 02 Nov 2013 04:24:00 +0000

Chromecast is a digital media streaming adapter developed by Google & available for just $35 at leading ecommerce sites . You just need to plug it in HDMI port of your T.V & you can easily stream videos/photos/surf internet from your laptop or any android device right in your T.V via Wifi from internet or local network .

You can find Google Chrome extension for chromecast at the link Chrome Cast Extension . You just need to

have latest chrome browser on your laptop/desktop to install this extension & then you can easily stream your laptop content on your T.V.

Chrome apps to access from your windows desktop

noreply@blogger.com (Anonymous) — Sat, 26 Oct 2013 17:08:00 +0000

Google chrome apps now can work in a similar way as other desktop based apps by just pinning the chrome web store link to your windows taskbar.

For this you need to update your chrome browser & install any new offline app from chrome store.Chrome browser will automatically add a link to your taskbar to access your app.

Google search tips & tricks

noreply@blogger.com (Anonymous) — Tue, 10 Sep 2013 08:34:00 +0000

Here are some google search tips & tricks which we can use to make our search more relevant & powerful.

Search for exact phrase or word

When you type your search like - where can i found good blogs , google split this phrase into each words & ignoring grammar & helping verbs ("are" , "is" , "the" etc..) , then look into there database for these words ("where" , "found" , "good" , "blogs" ) & fetch results according to some algorithms , hence showing relevant search results.

So when you want to search exact phrase without splitting sentence into words you can type your search like this "where i can found good blogs" .

Search from specific website

If you want to search from specific website only you can use this method:

Search for flight times giving source & destination

Type - "flights from New york to San Francisco" to get list of flight timings for the day.

Search Local Food/Hotel/business

You can search Local Business by searching this way "Pizza place Dallas"

Checking flight status

Searching all albums by artist

Searching Movies in 2012 (any year)

Creating graph for any function

2-D Graph

Getting Direction from your current location

Amazing use of skydrive and PPT for online teaching

noreply@blogger.com (Anonymous) — Wed, 04 Sep 2013 16:40:00 +0000

It is very common that when we try to learn something from web , we mostly visit google with relevant search or youtube to get some more moving/realistic picture with sound so that learning becomes more understandable & interesting.

Generally Tutors give online lessons on any topic with the help PPTs or notepad & running camstudio (most popularly used for desktop screen video) at background to capture video on screen plus sound. Then they optimize/compress that captured video so that they can be uploaded to youtube fast & also can be viewed by users without much buffering.So you can observe the amount of time & work goes into this.

Today , i will share some awesome stuff that teachers or any tutor can use to deliver online videos without much work and also of less memory size .

Online teaching with the help of skydrive + PPTs

Follow these steps :

Make a ppt on your desktop , adding any number of slides.
Then add your pre existing sound recording or you can record slide wise sound from this button ( Record Narration ) as shown in the picture.

( 3 ) Now upload this PPT in skydrive , i already posted this part before.

( 4 ) Now you can embed ppt on your website or blog. And it is ready to show slides along with your sound
recording.

Note : For now skydrive only supports the size of sound recording per slide less than 30-40kb. In future we can hope for more size.

Turn your Google Chrome Browser into an amazing notification bar

noreply@blogger.com (Anonymous) — Sun, 01 Sep 2013 06:35:00 +0000

You can now turn your chrome browser into an amazing notification bar by just installing this extension ( Knew Tab ) from chrome store .

Knew Tab Extension for Google Chrome Browser

After installing this extension , whenever you will open a new tab it will show this notification bar where you can see general updates like time news , temperature etc. Also great feature of this extension is that whenever you open your other accounts like facebook , gmail in other tabs , it will pick title header of their site page & show notifications right into this extension without signing up with any account for this extension.

Making your browser a notepad

noreply@blogger.com (Anonymous) — Sun, 01 Sep 2013 06:07:00 +0000

Using HTML5 , you can turn your browser into a notepad by just writing a single line of code in your browser url textbox. Type in data:text/html, <html contenteditable> & your browser will turn into a simple notepad.

What things you can do with this browser notepad :

You can save text using CTRL + S
You can print your text right from your browser
You can increase text size by pressing CTRL + mouse scroll

It have limited functionality , but still can be used sometimes.

One more functionality we can use chome notepad is saving any content from web into pdf format.
You can pick (copy) content from other sites & place (paste) on this notepad.

Now press CTRL + P , chrome will open print preview for the page. Change output type from printer to PDF , now you can save the page as PDF.

This can be useful & pretty easy too when you are trying to create some documents on the go.

Embed presentations on your website or blog using skydrive

noreply@blogger.com (Anonymous) — Sat, 31 Aug 2013 21:18:00 +0000

You can now embed presentations on websites by uploading PPT created from desktop client & upload it to skydrive.

How :

( 1 ) Create PPT from Microsoft Power Point .

( 2 ) Upload that .pptx file to your skydrive account & mark that folder or file as public.

( 3 ) Get the embed code & paste it into your website or blog , And now you can see your ppt on web browser without installing any addon or writing any code .

Create amazing magazines on web using Flipboard

noreply@blogger.com (Anonymous) — Sat, 31 Aug 2013 20:39:00 +0000

Flipboard is a ios , android app for reading latest articles/content collected from various websites & blogs in the most beautiful form.You will definitely enjoy & love the way content is presented on this app . Along with contents you can also sync your other accounts like twitter , facebook , instagram etc.

Few months back Flipboard launched the magazine feature on which we can create our own magazine by just adding links/urls to the magazine we created with suitable title & description & making it public or private so that others can read or share.

Just few days back Flipboard launched web version of Flipboard magazine which means what we created (magazine) on app can be viewed on web browser. Have a look at this & you will get what i mean Indie Electronics Flipboard Magazine .

Innovative use of this feature

You can use this feature and create amazing magazines by adding best links from your own website or blogs and generate magazine url and put on website header so that other can see & know about your website with amazing flips.

One drawback is that you need to create account from ios / android app , then only you can add links from your desktop browser to the magazine you created.

To add links from your desktop browser , check this instruction on Flipboard site.

Code right in your browser using skydrive

noreply@blogger.com (Anonymous) — Sat, 31 Aug 2013 06:23:00 +0000

You can now code directly in your browser using cloud service skydrive. You just need to upload file with extension like .css , .js , .html and upload that file on skydrive .

Skydrive automatically understands file with the help of extension & help you in editing the file right in the skydrive application on browser. It also gives you autosuggest feature which is amazing.

Firefox OS simulator on your browser

noreply@blogger.com (Anonymous) — Sat, 31 Aug 2013 04:47:00 +0000

Firefox OS is going to be released around 2014 , but you can play with its UI using this Firefox OS Simulator add on on your browser itself . Also can check for features & other things on this website Firefox OS. If you are excited about this platform & want to publish apps on there marketplace , start brushing your skills on HTML5 , CSS , Javascript , Jquery.

Use this app to save your links for later reading

noreply@blogger.com (Anonymous) — Fri, 30 Aug 2013 18:57:00 +0000

Two months back i found this app (Pocket) for mobile which syncs all links (html pages) across devices to read it later .

This app beautifully parse html & show plain text which is optimized for reading.This app works on many other news reading apps also like Flipboard , Feedly etc..

Browser Shortcut for email writing

noreply@blogger.com (Anonymous) — Fri, 30 Aug 2013 18:32:00 +0000

Sometimes when you are multitasking between browser , mail client (outlook) & other softwares , so switching between them consumes time when you need to write emails more frequently.
So , you can try this trick to write mail right from your browser.

mailto:mohitverma3222@gmail.com?subject=hi&body=i m busy right now, will let u know

& great benefit is that browser will save this mailto url , so you can select frequently sent/used mails.