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Airtel Africa Java Developer Interview Questions and Answers
Airtel Africa Java Developer Interview Experiences
1 interview found
I applied via Approached by Company and was interviewed in Oct 2024. There was 1 interview round.
(2 Questions)
- Q1. What is a qualifier?
- Ans.
A qualifier in Java is a keyword used to specify additional information about a variable or method.
Qualifiers include 'final', 'static', 'abstract', 'public', 'private', 'protected', etc.
They are used to define the behavior and access level of variables and methods.
For example, 'final' qualifier makes a variable constant and 'static' qualifier allows a method to be called without creating an instance of the class.
- Q2. What is primary annotation?
- Ans.
Primary annotation is used to indicate the primary key in a database table.
Primary annotation is used in Java Persistence API (JPA) to specify the primary key of an entity.
It is used with @Id annotation to define the primary key field in a database table.
Example: @Entity @Table(name = "employees") public class Employee { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "employee_id") p
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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
(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
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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
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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...
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(3 Questions)
- Q1. Tell me about your self
- Q2. Why you want to change the company
- Q3. Why you left your previous company
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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
Software Developer Interview Questions & Answers
Vodafone Idea
Sarthak Tripathi
posted on 5 Apr 2024
Selected
I applied via campus placement at Department of Management Studies IIT Delhi, Delhi and was interviewed before Apr 2023. There were 3 interview rounds.
2 coding question 1 hr
Topic on environment issue
(2 Questions)
- Q1. Normal discussion
- Q2. Where are u from
Interview Preparation Tips
Anil K
I applied via new era india and was interviewed before Dec 2021. There were 4 interview rounds.
(1 Question)
- Q1. Write a sample code using AngularJS
- Ans.
Sample code using AngularJS
Create a module and controller
Bind data to HTML using directives
Use services for data retrieval and manipulation
Implement two-way data binding
Example: https://codepen.io/mohit-kumar/pen/ExjJzjM
(1 Question)
- Q1. Why did you leave the previous company
(1 Question)
- Q1. Why are you looking for a change?
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