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CitiusTech Java Developer Interview Questions and Answers
8 Interview questions
Redux is a predictable state container for JavaScript apps, commonly used with React for managing application state.
Redux helps manage the state of an application in a predictable way
It provides a single source of truth for the state of the application
Actions are dispatched to update the state in a predictable manner
Reducers specify how the state changes in response to actions
Redux is commonly used with React to m...
Spring Boot is a framework that simplifies the development of Java applications by providing pre-configured settings and tools.
Spring Boot eliminates the need for manual configuration by providing defaults for most settings.
It allows for easy creation of stand-alone, production-grade Spring-based applications.
Spring Boot includes embedded servers like Tomcat, Jetty, or Undertow, making it easy to deploy applicatio...
Context API in React is a way to pass data through the component tree without having to pass props down manually at every level.
Context API provides a way to share values like themes, user data, etc. across the component tree without having to pass props down manually.
It consists of three main parts: Provider, Consumer, and useContext hook.
Provider component allows the data to be passed down to the tree, Consumer ...
JUnit is a popular testing framework for Java, used to write and run repeatable tests.
JUnit annotations: Use @Test to indicate a test method.
Assertions: Use assertEquals(expected, actual) to verify outcomes.
Setup and teardown: Use @Before and @After for setup and cleanup tasks.
Parameterized tests: Use @RunWith(Parameterized.class) for testing with multiple data sets.
Mocking: Use Mockito to create mock objects for ...
What people are saying about CitiusTech
Multithreading in Java allows for concurrent execution of multiple tasks, improving performance and responsiveness.
1. Improved performance by utilizing multiple CPU cores efficiently.
2. Enhanced responsiveness as tasks can run concurrently without blocking each other.
3. Simplified coding for complex tasks by breaking them into smaller threads.
4. Facilitates better resource utilization and scalability.
5. Examples: ...
Comparable is an interface used for natural ordering, while Comparator is an interface used for custom ordering in Java.
Comparable interface is used to define the natural ordering of objects. It is implemented by the class whose objects are to be compared.
Comparator interface is used to define custom ordering of objects. It is implemented by a separate class.
Comparable interface has a single method, compareTo(), w...
CitiusTech HR Interview Questions
Word Frequency Counter
Given a string 'S' consisting of words, your task is to calculate how many times each word appears in the string. A word is a series of one or more non-space characters. In 'S', word...
Count the frequency of each word in a given string.
Split the string by spaces to get individual words.
Use a hashmap to store each word and its frequency.
Iterate through the words and update the hashmap accordingly.
Print out the words and their frequencies in any order.
Azure and AWS are two major cloud service providers offering similar services but with some differences in features and pricing.
AWS is the oldest and most widely used cloud service provider, while Azure is catching up quickly.
Azure is known for its strong integration with Microsoft products and services, while AWS has a wider range of third-party integrations.
AWS has a larger global presence with more data centers...
CitiusTech Java Developer Interview Experiences
4 interviews found
I applied via Recruitment Consulltant and was interviewed in Dec 2024. There was 1 interview round.
(3 Questions)
- Q1. Explain Spring Boot
- Q2. What is Redux in React
- Q3. What is Context API in React
I applied via Job Fair and was interviewed in Jul 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Java 8 features
- Q2. Junit code writing
(2 Questions)
- Q1. Reason for job change
- Q2. Past experience
Ashwini Salunke
(1 Question)
- Q1. Count duplicate from int array
Skills evaluated in this interview
I appeared for an interview in Dec 2021.
(2 Questions)
Round duration - 60 minutes
Round difficulty - Easy
This was a technical round with questions on Coding and core java based questions.
- Q1.
Word Frequency Counter
Given a string 'S' consisting of words, your task is to calculate how many times each word appears in the string. A word is a series of one or more non-space characters. In 'S', wor...
- Ans.
Count the frequency of each word in a given string.
Split the string by spaces to get individual words.
Use a hashmap to store each word and its frequency.
Iterate through the words and update the hashmap accordingly.
Print out the words and their frequencies in any order.
- Q2. What is the difference between Comparable and Comparator in Java?
- Ans.
Comparable is an interface used for natural ordering, while Comparator is an interface used for custom ordering in Java.
Comparable interface is used to define the natural ordering of objects. It is implemented by the class whose objects are to be compared.
Comparator interface is used to define custom ordering of objects. It is implemented by a separate class.
Comparable interface has a single method, compareTo(), which ...
(2 Questions)
Round duration - 60 minutes
Round difficulty - Easy
This was a technical + managerial round.
- Q1. What are the advantages of multithreading in Java?
- Ans.
Multithreading in Java allows for concurrent execution of multiple tasks, improving performance and responsiveness.
1. Improved performance by utilizing multiple CPU cores efficiently.
2. Enhanced responsiveness as tasks can run concurrently without blocking each other.
3. Simplified coding for complex tasks by breaking them into smaller threads.
4. Facilitates better resource utilization and scalability.
5. Examples: paral...
- Q2. What is the comparison between Azure and AWS cloud service providers?
- Ans.
Azure and AWS are two major cloud service providers offering similar services but with some differences in features and pricing.
AWS is the oldest and most widely used cloud service provider, while Azure is catching up quickly.
Azure is known for its strong integration with Microsoft products and services, while AWS has a wider range of third-party integrations.
AWS has a larger global presence with more data centers worl...
Round duration - 30 minutes
Round difficulty - Easy
This was a typical HR round.
Interview Preparation Tips
Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.
Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.
Skills evaluated in this interview
Interview questions from similar companies
Software Developer Interview Questions & Answers
Collabera Technologies
Anonymous
posted on 3 Feb 2021
Interview Questionnaire
1 Question
- Q1. Interview questions on .net technology
I appeared for an interview before Sep 2020.
(2 Questions)
Round duration - 90 minutes
Round difficulty - Medium
We were supposed to give test in any time between 3 PM to 9 PM.
- Q1.
Total Unique Paths Problem Statement
You are located at point ‘A’, the top-left corner of an M x N matrix, and your target is point ‘B’, the bottom-right corner of the same matrix. Your task is to calcula...
- Ans.
The problem involves finding the total number of unique paths from the top-left to bottom-right cell of a matrix by moving only right or down.
Use dynamic programming to solve the problem efficiently.
Create a 2D array to store the number of unique paths at each cell.
Initialize the first row and first column with 1 as there is only one way to reach them.
For each cell (i, j), the number of unique paths is the sum of paths...
- Q2.
Subtree Node Count Problem
We are provided with a tree containing 'N' nodes, numbered from 0 to N-1. The objective is to determine the total number of nodes within each subtree of the provided tree. Speci...
- Ans.
Given a tree with N nodes, find the number of elements in each subtree rooted at every node.
Traverse the tree using Depth First Search (DFS) to calculate subtree sizes for each node.
Use an array to store subtree sizes for each node, starting with leaf nodes having size 1.
The subtree size of a node is the sum of subtree sizes of its children plus 1 for the node itself.
(1 Question)
Round duration - 120 minutes
Round difficulty - Medium
Pair Programming Interview( this round is similar to machine coding round) it started around 11 AM
Focus Areas: Problem solving and implementation of extensions.
The pair coding round is focused on OOPS concepts. You are paired with a TWer for this round. They let you code first for an hour and in the next hour they review your code and suggest changes which would improve the code structure, readability and make it modular and reusable and functional.
- Q1.
River Crossing: Help Ninja Cross Over
Ninja stands at the start of a wooden bridge over a river. Some segments of the bridge are damaged. The undamaged segments, marked as 'safe', are listed in an array
S... - Ans.
Check if Ninja can cross the river by jumping from one safe segment to another based on given constraints.
Iterate through the 'SAFE' array and check if Ninja can make the required jumps to reach the last safe segment.
Ensure that the next jump is either 'X' - 1, 'X', or 'X' + 1 units from the previous jump.
Return 'true' if Ninja can successfully cross the river, otherwise return 'false'.
(1 Question)
Round duration - 120 minutes
Round difficulty - Medium
Students who were shortlisted from Pair Programming round was selected for this round around 3 PM. In this round there were two interviewer.
- Q1.
Middle of a Linked List
You are given the head node of a singly linked list. Your task is to return a pointer pointing to the middle of the linked list.
If there is an odd number of elements, return the ...
- Ans.
Return the middle element of a singly linked list, or the one farther from the head if there are even elements.
Traverse the linked list with two pointers, one moving twice as fast as the other
When the fast pointer reaches the end, the slow pointer will be at the middle
Return the element pointed to by the slow pointer
Interview Preparation Tips
Tip 1 : Have good grasp on OOPS since they have a round named Pair Programming round which is focused upon this.
Tip 2 : Write clean, modular and functional code.
Tip 3 : Practice Data Structures and Algorithms
Tip 4 : You should know breadth and depth of whatever is mentioned in your resume.
Tip 5 : Be loud and clear.
Tip 1 : Make single page resume.
Tip 2 : Mention relevant things on resume.
Tip 3 : Do not put any false things on resume. Projects, internships you are mentioning be ready to answer questions related to it regarding what you solved, idea, databases, design.
Tip 4 : Contribute in open source, participate in hackathons.
Skills evaluated in this interview
Software Developer Interview Questions & Answers
Bounteous x Accolite
Anonymous
posted on 27 Jul 2022
I applied via Campus Placement and was interviewed before Jul 2021. There were 5 interview rounds.
Round 1 was about 60 mins long. Basic Aptitude questions along with Programming MCQ
Round 2 had 2 coding questions with a time limit of 60mins. Intermediate level problem solving
knowledge is neccessary.
(1 Question)
- Q1. Technical Round 1 was 1hr long. Detailed Insights about my project and a few programming questions in DSA
(1 Question)
- Q1. This Technical Round 2 was 1hr long and was mainly focused on problem solving skills and a few basic programming concepts.
(1 Question)
- Q1. Three Situational questions were asked .
Interview Preparation Tips
- Data Structures
- Algorithms
- CPP
- Problem Solving
I applied via Monster and was interviewed before Aug 2020. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. What is the difference between Hashmap and LinkedHashmap?
Interview Preparation Tips
Skills evaluated in this interview
Software Developer Interview Questions & Answers
Bounteous x Accolite
Anonymous
posted on 24 Jan 2022
I applied via Campus Placement and was interviewed before Jan 2021. There were 3 interview rounds.
Interview Questionnaire
3 Questions
- Q1. 1. Write a code to split an array of integers into two subarray where both the array has equal sum.
- Ans.
Code to split an array of integers into two subarrays with equal sum.
Iterate through the array and calculate the total sum.
Divide the sum by 2 to get the target sum for each subarray.
Use dynamic programming to find a subset of the array that adds up to the target sum.
Return the two subarrays.
Example: [1, 2, 3, 4, 5, 6] -> [1, 2, 3, 6], [4, 5]
Example: [1, 2, 3, 4, 5] -> [1, 4, 5], [2, 3]
- Q2. To write code to build up a binary tree from scratch (implement a BST) and then to write all the methods like all the tree traversal algo, and all other stuffs.
- Q3. Other OOPs concept and questions related to DSA and OS.
Interview Preparation Tips
Skills evaluated in this interview
Interview Questionnaire
1 Question
- Q1. Java multithreading, oops
CitiusTech Interview FAQs
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CitiusTech Interviews By Designations
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