Web Applications Engineer Interview Questions | Glassdoor

# Web Applications Engineer Interview Questions

43

Web applications engineer interview questions shared by candidates

## Top Interview Questions

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### Engineer - QCS Server Web Applications Development at Qualcomm was asked...

Jan 26, 2011
 How to discover if the given number is Power of 2 ? 4 Answers10=2 100=4 1000=8… Caught the thing .. he didn't like my implementation. don't be nervous!return (( x!=0) && (x & (x -1) == 0)) a number which is power of two will have single 1 in binary representation ex. 16 00010000 x-1 will have pattern 00001111 hence x&(x-1) will always be 0 for power of two numbers. Need to check condition for x!=0 since 0 is not a power of two. Special case to handle.if you can figure this out inside an hour, congratulations this isnt something that should be in an interview to be honest the level of difficulty of the answer that algo came up with is at the level of an upper division course that has a proof of it written in wikipedia i honestly like the brute force solutionShow More ResponsesDivide the number by 2, and repeat, until the result is a not an integer number (in this case is not a power of 2) or the result is 1 (in this case the number was a power of 2).

### Engineer - QCS Server Web Applications Development at Qualcomm was asked...

Jan 26, 2011
 Binary tree , left node has smallest value . Print 5 10 20 25 and then “count of nodes=4”… 2 Answersrecursion ... defined "current=head" in the method so it doesn't changes ofcourse, even if I sent current.next in recursion... don't be nervous!Did not get this question? Could you please eleborate it more?

### Senior Web Applications Engineer at Demand Media was asked...

Jun 22, 2012
 Asynchronous syntax1 AnswerMust know the exact syntax

### Web Applications Software Engineer at Digg was asked...

Oct 10, 2011
 What is CSS specificity?2 AnswersSpecificity determines, which CSS rule is applied by browsers. “Specificity is a type of weighting that has a bearing on how your cascading style sheet (CSS) rules are displayed here is very nice article explaining it http://coding.smashingmagazine.com/2007/07/27/css-specificity-things-you-should-know/Here is an excellent Medium article by Dan Eden that elaborates (with examples) how CSS specificity works: https://medium.com/@dte/understanding-css-selector-specificity-a02238a02a59#.t2ffxzs5h

### Engineer - QCS Server Web Applications Development at Qualcomm was asked...

Jan 26, 2011
 16 bit number: how to change the bits 0 with 1, 2 with 3 etc.. 1 Answernum && 101010101010101= first byte ; num && 0101010101010101 =sec byte, then first shift right, sec shift left and OR operand ” || “ for both..

### Engineer - QCS Server Web Applications Development at Qualcomm was asked...

Jan 26, 2011
 How to found first unrepeated character in the string. “abca” return “b” 1 Answer??.. Wrote something . don't remember.. don't be nervous!

### Web Applications Engineer at Skire was asked...

Jul 7, 2010
 Can a Java file have more than one public class in it?1 AnswerI said no.

### Engineer - QCS Server Web Applications Development at Qualcomm was asked...

Jan 26, 2011
 write class implements Queue with ability to set Priority for an item of the Queue 1 AnswerI was so nervous!... it was a firs question.. don't be nervous!

### Web Applications Engineer at Apple was asked...

Oct 10, 2017
 We have 100 teams who perform testing. They all produce the testing results in different formats such as mysql, binary bits, xml, json, nosql,etc. Your task is to show all this in a web application within one week. How would you do it in one week and keep this constraint in mind that the results from these 100 teams are in different formats so your API should be able to work with all the different format.Be the first to answer this question

### Web Applications Engineer at Nest was asked...

Aug 24, 2015
 Decode and Encode using Caesar CipherBe the first to answer this question
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