Interview Questions and Answers for 'T' | Search Interview Question

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Q1921. If a stack is implemented using linkedlist, which end (head or tail) should represent the top ?

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Q1922. Describe how a queue is usually created using sequential allocation.

Data Structure

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Q1923. What is the "multiplicative congruence" method for determining where an element belongs in a hash table ?

Data Structure

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Q1924. Which spring boot version are you working with ?

Spring Boot

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Q1925. Which development methodology do you use ?

General

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

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Q1926. Are you involved in architecture and design ?

General

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Q1927. 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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Q1928. Are you involved in getting business requirements ?

General

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Q1929. 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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Q1930. Why you chose programming as your career ?

General

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Q1931. Explain your experience working on UI ?

General

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Q1932. Have you worked with JSF ?

General

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Q1933. How long will it take for you to join Canopy ?

General

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Q1934. What is the Big O notation for Fibonacci series - both iterative as well as recursive ?

Algorithm

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Q1935. 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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Q1936. What is the access time for ArrayList and LinkedList ?

Data Structure

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

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Q1937. 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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Q1938. Design an algorithm and write code to remove the duplicate characters in a string without using any additional buffer.

Algorithm

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Q1939. Write a method that returns maximum depth of a tree ?

Algorithm

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Q1940. Given a sorted array, write an algorithm to create a binary tree.

Algorithm

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Q1941. Difference between Left and Inner Join ?

SQL

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Q1942. Write a method that takes a string as input and identifies if any permutation of the String is Palindrome ? For example - ttoobb has a permutation 'bottob' which is a palindrome.

Design

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Q1943. Given a list of People, We need to distribute their gifts in such a way that

Any Person shouldn't get it's gift back
If A's gift goes to B, B's gift shouldn't go to A

Write a method that returns a Map where Key is the Person's name and value is the name of person whose gift was exchanged.

Design

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Q1944. What is the difference between time and space complexity ?

Algorithm

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Q1945. Which data structure would you use to implement LRU cache and Why ? Can you tell me the time complexity for it ?

Algorithm

Ans. We can use LinkedHashMap as it will give time complexity of O(1) for lookup and We can maintain the insertion order to identify the Last used elements for eviction.

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Q1946. What is the difference between Observer and Subscriber ?

Design

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Q1947. What are Ractive Streams ?

ReactiveX

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Q1948. Have you heard of reactive extensions ?

ReactiveX

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Q1949. What are the drawbacks of Reactive extensions ?

ReactiveX

Ans. Reactive extensions have a steep learning curve which makes it confusing for beginner and intermediate developers.

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Q1950. What can we do if we need to retrieve Fibonacci value at a particular index faster ? Can we use Linked List ?

Data Structure

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