Ebani Advertising Associate Fullstack Developer Interview Questions and Answers

Q1. Difference between jvm jre jdk?
Ans. 
JVM is the virtual machine that runs Java bytecode, JRE is the runtime environment for Java programs, and JDK is the development kit for creating Java applications.
• JVM (Java Virtual Machine) is responsible for running Java bytecode on different platforms.

• JRE (Java Runtime Environment) includes JVM, libraries, and other components necessary to run Java applications.

• JDK (Java Development Kit) is a software development ki...read more
Answered by AI
Add your answer
Q2. Why string is immutable?
Ans. 
String is immutable in Java to ensure security, thread safety, and optimization.
• Immutable strings prevent accidental changes to sensitive data like passwords.

• Immutable strings allow for safe sharing of string literals across multiple threads.

• Immutable strings enable string pooling for memory optimization.

• Example: String str = "Hello"; str.concat(" World"); // str remains "Hello"
Answered by AI
Add your answer

Def factorial_iterative(n):
result = 1
for i in range(1, n + 1):
result *= i
return result

Q1. Java overloading overriding differences
Ans. 
Overloading is having multiple methods with the same name but different parameters, while overriding is implementing a method in a subclass with the same signature as in the superclass.
• Overloading allows different methods to have the same name but different parameters.

• Overriding involves implementing a method in a subclass with the same signature as in the superclass.

• Overloading is determined at compile time based on t...read more
Answered by AI
Add your answer
Q2. Angular decorators
Add your answer
Q3. Angular services
Add your answer

Q1. Tell me about internal working of JVM
Add your answer
Q2. Tell me about SAGA pattern in Microservices
Ans. 
SAGA pattern is a design pattern used in microservices architecture to manage distributed transactions.
• SAGA pattern breaks down a long-running transaction into a series of smaller, independent transactions.

• Each step in the SAGA pattern is a separate service that communicates with other services through events.

• If a step fails, compensating transactions are executed to rollback the changes made by previous steps.

• Example:...read more
Answered by AI
Add your answer

Q1. Tell me about your current project structure
Add your answer
Q2. What is an API , how would you secure an API
Ans. 
API stands for Application Programming Interface. It defines the methods and data formats that applications can use to communicate with each other.
• API is a set of rules and protocols that allows different software applications to communicate with each other.

• To secure an API, you can use authentication methods like OAuth, API keys, or JWT tokens.

• Implementing encryption (HTTPS) and rate limiting can also enhance API secu...read more
Answered by AI
Add your answer

Q1. Why do you want to relocate to Bangalore
Add your answer
Q2. Tell me about one instance where you faced pressure and how did you overcome ?
Add your answer

Q1. Basic js question on hoisting, closure, promises
Add your answer

Q1. Basic resume based
Add your answer

Q1. Salary discussion -- HR never responded
Add your answer

Q1. Java Basic questions
Add your answer
Q2. SpringBoot Basic questions
Add your answer
Q3. Simple DSA problem: "introduction" find duplicate characters
Ans. 
Find duplicate characters in a given array of strings
• Iterate through each string in the array

• For each string, iterate through each character and store the count in a hashmap

• If the count of any character is greater than 1, it is a duplicate
Answered by AI
Add your answer
Q4. Write code for REST API using spring boot, include all annotation
Ans. 
Code for REST API using Spring Boot with annotations
• Use @RestController annotation to define the class as a REST controller

• Use @RequestMapping annotation to map HTTP requests to handler methods

• Use @GetMapping, @PostMapping, @PutMapping, @DeleteMapping annotations for specific HTTP methods

• Use @PathVariable annotation to extract values from the URI

• Use @RequestBody annotation to bind HTTP request body to a method paramete
Answered by AI
Add your answer

Q1. SQL - a table with emp-id, emp-name, manager-id, Need to find the manger name for each emplyee.
Add your answer
Q2. FizzBuzz - if number is divisible by 3 print "fizz", if by 5 print "buzz", if by both "fizzbuzz"
Ans. 
A simple program to print 'fizz' for multiples of 3, 'buzz' for multiples of 5, and 'fizzbuzz' for multiples of both.
• Iterate through numbers from 1 to n.

• Use modulo operator to check divisibility by 3 and 5.

• Print 'fizz', 'buzz', or 'fizzbuzz' accordingly.
Answered by AI
View 1 more amswer
Q3. Is it necessary for classes implementing an interface to implement interface methods?
Ans. 
Yes, classes implementing an interface must implement interface methods.
• Classes implementing an interface must provide concrete implementations for all methods declared in the interface.

• Failure to implement all interface methods will result in a compilation error.

• Interfaces are used to define a contract that implementing classes must adhere to.
Answered by AI
Add your answer
Q4. Spring basics - annotations
Add your answer

Q1. Spring boot basics
Add your answer

Q1. Talked about my previous companies and salary. Before they conduct the interview I had told them my expectation, while negotiation they denied for providing that and were offering just 10% hike over my cur...read more
Add your answer

Q1. Solid principles
Add your answer

Q1. How to handle stressful scenarios
Ans. 
Handling stressful scenarios involves staying calm, prioritizing tasks, seeking support, and practicing self-care.
• Stay calm and take deep breaths to manage emotions

• Prioritize tasks based on urgency and importance

• Seek support from colleagues, mentors, or counselors

• Practice self-care activities like exercise, meditation, or hobbies
Answered by AI
Add your answer