AmbitionBox
Interview Questions
- Reviews
- Salaries
- Interview Questions
- About Company
- Benefits
- Jobs
- Office Photos
- Community
Add office photos
Filter interviews by
AT&T Java Developer Interview Questions and Answers
AT&T Java Developer Interview Experiences
1 interview found
(2 Questions)
- Q1. How to pull the large amount of data in spring data jpa
- Ans.
To pull large amount of data in Spring Data JPA, use pagination, lazy loading, and query optimization techniques.
Use pagination to limit the amount of data retrieved in each query
Implement lazy loading to fetch data only when needed
Optimize queries by using indexes, avoiding N+1 query problem, and fetching only necessary columns
- Q2. Write singleton class
- Ans.
Singleton class ensures only one instance of a class is created and provides a global point of access to it.
Create a private static instance of the class
Provide a private constructor to prevent instantiation
Create a public static method to access the instance
Interview Preparation Tips
Skills evaluated in this interview
Top trending discussions
Interview questions from similar companies
I applied via Naukri.com and was interviewed in Mar 2024. There was 1 interview round.
(2 Questions)
- Q1. Memory management in java 8
- Ans.
Java 8 introduced improvements in memory management with features like Metaspace and G1 garbage collector.
Java 8 introduced Metaspace to replace the PermGen space for class metadata storage.
G1 garbage collector in Java 8 improves garbage collection performance by dividing the heap into regions.
Java 8 also introduced the concept of String deduplication to reduce memory usage for String objects.
- Q2. CQRS pattern in microservices
- Ans.
CQRS pattern separates read and write operations in microservices for better scalability and performance.
CQRS stands for Command Query Responsibility Segregation
It separates the read and write operations in microservices
Write operations update the data, while read operations retrieve the data
Helps in improving scalability and performance by optimizing for each operation type
Skills evaluated in this interview
Selected
I applied via Walk-in and was interviewed in Jun 2023. There were 5 interview rounds.
For freshers there is online aptitude test.
Coding round is done by interviewers on live screen sharing
(1 Question)
- Q1. Here they discuss about projects and work in depth.
(2 Questions)
- Q1. Tell me about yourself? What are your hobbies? If you get chance to work with our company what is your expectations from us?
- Q2. Discuss about policies and work culture
Java Developer Interview Questions & Answers
Tata Communications Transformation Services
Anonymous
posted on 6 Jun 2023
I applied via Campus Placement and was interviewed in May 2023. There were 2 interview rounds.
(2 Questions)
- Q1. How to make a new products
- Ans.
To make a new product, conduct market research, identify customer needs, develop a prototype, test it, gather feedback, and iterate.
Conduct market research to identify gaps in the market and customer needs
Develop a prototype of the product based on the research findings
Test the prototype with a focus group or beta testers to gather feedback
Iterate on the product based on the feedback received to improve its features an
- Q2. How to the growth the company
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed before Nov 2022. There were 3 interview rounds.
(2 Questions)
- Q1. Asking related to java, and good knowledge of Oops concepts
- Q2. Basic java program
(2 Questions)
- Q1. Asking past project and technology that you are using
- Q2. API related question like rest, sop
I applied via Company Website and was interviewed in Aug 2022. There were 2 interview rounds.
Oops, singleton, api, array problems, logical part, springboot, hibernate
(2 Questions)
- Q1. Hibernate coding, sessionFactory, git, maven, oops concepts, multithreading, synchronisation, String
- Q2. Introduction about yourself, project flow, why do you want to switch
- Ans.
I am a Java Developer with experience in project flow and looking to switch for new challenges.
I have been working as a Java Developer for the past 5 years.
I have experience in developing and maintaining Java applications.
I am familiar with the project flow and have worked on various stages of software development life cycle.
I am seeking new opportunities to enhance my skills and work on challenging projects.
I am looki...
Interview Preparation Tips
(3 Questions)
- Q1. Tell me about your self
- Q2. Why you want to change the company
- Q3. Why you left your previous company
Interview Preparation Tips
(2 Questions)
- Q1. Reverse a linked list.
- Q2. Merge sort on a array/
I applied via Job Portal and was interviewed in Sep 2023. There were 4 interview rounds.
Java and spring related questions
(2 Questions)
- Q1. Stream related comparator
- Q2. Longest increasing subsequence
- Ans.
Find the longest increasing subsequence in an array of integers.
Use dynamic programming to keep track of the longest increasing subsequence ending at each index.
Iterate through the array and update the longest increasing subsequence for each index.
Return the maximum length of the longest increasing subsequence found.
(2 Questions)
- Q1. Discussion Related to experience and java related questions like internals of hashmap, treemap
- Q2. Design instagram story
(2 Questions)
- Q1. Questions related to current project and overall experience
- Q2. Behaviour questions as well
Skills evaluated in this interview
Software Developer Interview Questions & Answers
Huawei Technologies
Ruoxi Chen
posted on 16 May 2024
Selected
I applied via Campus Placement and was interviewed in Nov 2023. There was 1 interview round.
(2 Questions)
- Q1. Tell me about you teaching assistant experience in your university
- Q2. Teaching basic programming courses
AT&T Interview FAQs
Tell us how to improve this page.
AT&T Interviews By Designations
- AT&T Network Engineer Interview Questions
- AT&T Intern Interview Questions
- AT&T Senior Manager Interview Questions
- AT&T Technical Intern Interview Questions
- AT&T Technical Specialist Interview Questions
- AT&T Apprentice Interview Questions
- AT&T Associate Quality Assurance Engineer Interview Questions
- AT&T Customer Service Agent Interview Questions
- Show more
Interview Questions for Popular Designations
- Senior Java Developer Interview Questions
- Junior Java Developer Interview Questions
- Java Software Developer Interview Questions
- Java Developer Trainee Interview Questions
- Java Software Engineer Interview Questions
- Associate Java Developer Interview Questions
- Software Developer Interview Questions
- Java Technical Lead Interview Questions
- Show more
AT&T Java Developer Interview Process
based on 1 interview
Interview experience
Interview Questions from Similar Companies
Fast track your campus placements
|
Technical Specialist
306
salaries
|  ₹14 L/yr - ₹38 L/yr |
|
Senior Associate
276
salaries
| ₹7.5 L/yr - ₹20.6 L/yr |
|
Network Engineer
221
salaries
| ₹3.4 L/yr - ₹13.6 L/yr |
|
Senior Technical Specialist
137
salaries
| ₹20 L/yr - ₹49.8 L/yr |
|
Senior Network Engineer
110
salaries
| ₹7 L/yr - ₹22 L/yr |
Verizon
Vodafone Idea
Bharti Airtel
Reliance Communications
- Home >
- Interviews >
- AT&T Interview Questions >
- AT&T Java Developer Interview Questions
