Interview Questions and Answers for 'L' | Search Interview Question

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Q1511. Find unique values between two arrays using single for loop ?

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Q1512. Make "I Know Java" as "I Java Know" without using any inbuilt functions.

Core Java

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Q1513. What is the biggest learning in any of your previous jobs ?

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Q1514. What is ViewResolver in Spring MVC ?

Spring

Ans. View resolver is used to get view name from Controller and resolve the next view page

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Q1515. Given the Phone keys mapping between numbers and characters as following

1 - a,b,c
2 - d,e,f

and so on, Write a Program that takes the integer as input and then print all possible combinations of characters matching those integers.

For example - 12 should return

ad,ae,af,bd,be,bf,cd,ce,cf

Design

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Q1516. Given a linked list with 0 to n node references , Flaten the Linked list

Algorithm

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Q1517. Can you explain the recent bug in your project and how you fixed it.

General

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Q1518. What is the structure of your team ?

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Q1519. Math.round method rounds the decimal to an integer by stripping off the decimal places. How can we use the same method to keep only 2 decimal places

For example -

Math.round(12.3456) will return 12. What should we do to get 12.34 without using any other class or method.

Core Java

Ans. We can multiply the value by 100 and then use Math.round on that and then divide the result by 100

For example -

(Math.round(12.3456 * 100)) / 100

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Q1520. What is the difference between round and scale method of BigDecimal ?

Core Java

Ans. Round method would round it to integer places irrespective of if it's decimal places or not whereas scale would only round the decimal places.

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Q1521. What was the most complex problem you faced in your career and how you fixed it ?

General

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Q1522. Given a comma separated string that signifies the current position in 4 * 4 tic tac toes game, write a program that gives the result of the game - If anyone win and if yes then who and if the game is still open.

For example - x,0,x,x,x,0,0,0,0,x,0,x means that 00 index has x, 01 has 0 and so on with x(3,3) has last element x

Design

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Q1523. Which development methodology do you use ?

General

Ans. http://www.itinfo.am/eng/software-development-methodologies/

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Q1524. Are you involved in architecture and design ?

General

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Q1525. What are you using AWS lambda for ?

Amazon Web Services (AWS)

Ans. We are using it for computation (EC2) , Storage (S3) and Database (RDS)

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Q1526. Are you involved in getting business requirements ?

General

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Q1527. Do you have any problems with your team that you plan on changing ?

General

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Q1528. Have you ever faced challenged with your current work ?

General

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Q1529. What methodology and technology stack do you use ?

General

Ans. [Open Ended Answer]

Possible Answer - We are using Agile. We have daily standups, Bi weekly Backlog Grooming , Planning and Retrospective, We have a 2 week sprint and We use Jira for Scrum Management. We are using Java 8, Spring Boot, JSF , Apache Kafka , Soap as well as Rest Services.

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Q1530. Why you chose programming as your career ?

General

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Q1531. Explain your experience working on UI ?

General

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Q1532. Have you worked with JSF ?

General

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Q1533. How long will it take for you to join Canopy ?

General

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Q1534. What is the Big O notation for Fibonacci series - both iterative as well as recursive ?

Algorithm

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Q1535. Write code to see if a Linked List has cycle in it ?

or

Write code using Floyd Algorithm to see if a linked list has cycle in it ? What is it's comlexity ?

Algorithm

Ans. public class LinkedList {

Node start = null;
Node head = null;

class Node {
Integer body;
Node nextNode;

Node(Integer value) {
body = value;
}
}

public static void main(String[] args) {
LinkedList ll = new LinkedList();

ll.addNodeToEnd(5);
ll.addNodeToEnd(10);
ll.addNodeToEnd(15);

ll.traverse();

if(checkIfLoop(l1)){
System.out.println("There is a Loop");
} else {
System.out.println("No Loop");
}
}

private boolean checkifLoop(Test l1) {
Node slow = start;
Node fast = start;
Node faster = start;

while(slow != null ) {
fast = slow.nextNode;
faster = fast.nextNode;
if(slow == fast || slow == faster) {
return true;
}
slow = slow.nextNode;
}

return false;
}

}

Complexity of this algorithm is O(n)

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Q1536. What is the access time for ArrayList and LinkedList ?

Data Structure

Ans. O(1) for ArrayList
O(n) for LinkedList

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Q1537. What is the runtime complexity of appending strings to string object and Why ?

Algorithm

Ans. O(n^2) because each time a string is appended a new String is created and it runs through all the letters to copy them over.

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Q1538. Design an algorithm and write code to remove the duplicate characters in a string without using any additional buffer.

Algorithm

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Q1539. Write a method that returns maximum depth of a tree ?

Algorithm

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Q1540. Given a sorted array, write an algorithm to create a binary tree.

Algorithm

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