Techversant Infotech Junior Java Developer Interview Questions and Answers

Code Snept question with 3-4 Reasoning question. Google form

Pen paper coding round. String , Array . Linkedlist , graph, questions

Q1. Maximum Spaning
Add your answer
Q2. Nearest Prime number
Ans. 
To find the nearest prime number, iterate from the given number in both directions until a prime number is found.
• Start iterating from the given number in both directions to find the nearest prime number.

• Check if a number is prime by dividing it by all numbers less than its square root.

• Keep track of the closest prime number found during the iteration.
Answered by AI
Add your answer
Q3. Second Maximum Number in Array
Ans. 
Find the second maximum number in an array of strings.
• Convert the array of strings to an array of integers.

• Sort the array in descending order.

• Return the second element in the sorted array.
Answered by AI
Add your answer

Q1. Project Question
Add your answer
Q2. Robot question of DSA
Add your answer
Q3. Stock Buy and sell - VI . Leetcode Hard
Add your answer
Q4. Leetcode Medium
Add your answer

Q1. How make a queue using a stack
Ans. 
To implement a queue using a stack, use two stacks and simulate the queue operations.
• Use two stacks, one for enqueue operation and one for dequeue operation.

• For enqueue operation, simply push elements onto the stack used for enqueueing.

• For dequeue operation, if the dequeue stack is empty, pop all elements from enqueue stack and push onto dequeue stack.

• Then pop from the dequeue stack to simulate dequeue operation.
Answered by AI
Add your answer
Q2. Create a linked list
Ans. 
A linked list is a data structure consisting of nodes where each node points to the next node in the sequence.
• Create a Node class with data and next pointer

• Initialize a head pointer to null

• Add nodes by updating next pointers

• Traverse the list by following next pointers
Answered by AI
Add your answer

Q1. Lookup vs graphlookup in mongodb
Ans. 
Lookup is used to perform a left outer join in MongoDB, while graphlookup is used to perform recursive graph traversal.
• Lookup is used to perform a left outer join between two collections in MongoDB.

• Graphlookup is used to perform recursive graph traversal in a collection that contains graph data.

• Lookup can only perform a single level join, while graphlookup can perform multiple levels of traversal.

• Lookup is faster than
Answered by AI
Add your answer
Q2. Count frequency of each character in string
Ans. 
Use a hashmap to count the frequency of each character in a string.
• Create a hashmap to store characters as keys and their frequencies as values.

• Iterate through the string and update the hashmap accordingly.

• Return the hashmap with character frequencies.
Answered by AI
Add your answer

Q1. Create a rest api all the way from controller to repository using NOTEPAD
Ans. 
Creating a REST API from controller to repository using NOTEPAD
• Create a controller class with mapping annotations for REST endpoints

• Implement service layer to handle business logic and interact with repository

• Define repository interface with methods for data access operations

• Use Spring Boot for easy setup and configuration

• Test API endpoints using tools like Postman
Answered by AI
Add your answer
Q2. Couldnt write custom mongodb query at repository layer in notepad which rejected my candidature.
Add your answer

It is very impressive work on Josh technology assessment because we learn many new skills.

Q1. What is api and how it is work ?
Ans. 
API stands for Application Programming Interface. It is a set of rules and protocols that allows different software applications to communicate with each other.
• APIs define the methods and data formats that applications can use to request and exchange information.

• APIs can be used to access services provided by other software applications, such as retrieving data from a database or sending notifications.

• Examples of APIs ...read more
Answered by AI
Add your answer
Q2. What is software development life cycle and which steps are following?
Ans. 
Software development life cycle (SDLC) is a process used by software developers to design, develop, and test software.
• 1. Planning: Define the project scope, requirements, and objectives.

• 2. Analysis: Gather and analyze user requirements.

• 3. Design: Create a detailed design of the software.

• 4. Implementation: Develop the software based on the design.

• 5. Testing: Test the software for bugs and issues.

• 6. Deployment: Release t...read more
Answered by AI
Add your answer

It was ok. I was not able to solve all the questions.

Q1. Remove the last element from a linkedlist
Add your answer
Q2. Some basic questions on oops dbms and os
Add your answer

The interviewer asked about javascript basics and DSA questions and some typescript questions

Quantitative arithmetic,verbal reasoning,non-verbal reasoning,etc