Desarrollador Backend Java Interview Questions

712,592 desarrollador backend java interview questions shared by candidates

What is the output of below program. var a = [1,2,3,4] for (var i=0; i<a.length; i++){ setTimeout(function(){ console.log(i) },1000) } ( My Ans : it will print 4 5 times as it will store the latest reference) Next They asked me : How can i print 1,2,3,4 by changing some code in above example
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Senior UI Developer

Interviewed at ValueLabs

4
Feb 16, 2018

What is the output of below program. var a = [1,2,3,4] for (var i=0; i<a.length; i++){ setTimeout(function(){ console.log(i) },1000) } ( My Ans : it will print 4 5 times as it will store the latest reference) Next They asked me : How can i print 1,2,3,4 by changing some code in above example

puzzle two wires of diff dimensions have been given. both of them gets completely combusted in 1 hour. you are in a pitch dark room with such two wires and a box of matches. you have to come out of the room in 45 minutes. [you cannot count seconds in your mind or else you cannot visually determine the halfway of the wires given neither do you have anything else other than a box of matches and those 2 wires]
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Software Engineer Trainee

Interviewed at Cognizant

3.5
Sep 11, 2016

puzzle two wires of diff dimensions have been given. both of them gets completely combusted in 1 hour. you are in a pitch dark room with such two wires and a box of matches. you have to come out of the room in 45 minutes. [you cannot count seconds in your mind or else you cannot visually determine the halfway of the wires given neither do you have anything else other than a box of matches and those 2 wires]

Consider 4 components of a color where: unsigned char red = 0x10; unsigned char green = 0xFF; unsigned char blue = 0x0F; unsigned char alpha = 0x44; Generate a packed color ARGB which is a 32 bit integer such that A is in the MSB of ARGB followed by red, green, blue ----------------- | A | R | G | B | -----------------
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Senior Software Engineer

Interviewed at SanDisk

3.4
Apr 3, 2010

Consider 4 components of a color where: unsigned char red = 0x10; unsigned char green = 0xFF; unsigned char blue = 0x0F; unsigned char alpha = 0x44; Generate a packed color ARGB which is a 32 bit integer such that A is in the MSB of ARGB followed by red, green, blue ----------------- | A | R | G | B | -----------------

1) One grandfather has three grandchildren, two of their age difference is 3, eldest child age is 3 times youngest child’s age and eldest child’s age is two times of sum of other two children. What is the age of eldest child? (Ans: 15 years) 2) we can tell you that the first and last digits of the year during which he was born add up to the second digit and that the third digit is one larger than the second digit and that 3 times fourth digit equals 2 times the third digit. Calculate year of his birth. (Ans: 1564) 3) Bella wants to go on a date and prefers her date to be tall, dark and handsome. Of the preferred traits - tall, dark and handsome - no two of Lautner, Jacob, Edward and Welch have the same number. Only Lautner or Welch is tall and fair. Only Jacob or Edward is short and handsome. Lautner and Edward are either both tall or both short. Jacob and Welch are either both dark or both fair. Who is Bella's date? (Ans: Edward)
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Software Engineer

Interviewed at VinSol

3.7
Nov 14, 2014

1) One grandfather has three grandchildren, two of their age difference is 3, eldest child age is 3 times youngest child’s age and eldest child’s age is two times of sum of other two children. What is the age of eldest child? (Ans: 15 years) 2) we can tell you that the first and last digits of the year during which he was born add up to the second digit and that the third digit is one larger than the second digit and that 3 times fourth digit equals 2 times the third digit. Calculate year of his birth. (Ans: 1564) 3) Bella wants to go on a date and prefers her date to be tall, dark and handsome. Of the preferred traits - tall, dark and handsome - no two of Lautner, Jacob, Edward and Welch have the same number. Only Lautner or Welch is tall and fair. Only Jacob or Edward is short and handsome. Lautner and Edward are either both tall or both short. Jacob and Welch are either both dark or both fair. Who is Bella's date? (Ans: Edward)

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