Latest Questions 84 total
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16How does Docker networking work?
Docker networking allows containers to communicate with each other and the outside world.
**Default network types:**
1. **bridge** (defaul...
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17What is the difference between Git merge and Git rebase?
Both combine branches but in different ways:
**Git Merge:**
- Creates a new merge commit
- Preserves complete history with all branches vis...
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18What is Kubernetes and why is it used?
Kubernetes (K8s) is an open-source container orchestration platform that automates deployment, scaling, and management of containerised appl...
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19What is CI/CD and how does it work?
CI/CD stands for Continuous Integration and Continuous Delivery/Deployment.
**Continuous Integration (CI):**
- Developers push code frequen...
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20What is multithreading in Java and how do you implement it?
Multithreading allows a Java program to execute multiple threads simultaneously, improving performance for concurrent tasks.
**Two ways to ...
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21What is the difference between ArrayList and LinkedList in Java?
Both implement the `List` interface but with different internal structures:
**ArrayList:**
- Backed by a dynamic array
- O(1) random access...
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22What is Spring Boot and why is it used for backend development?
Spring Boot is a framework that makes it easy to create production-ready Java applications with minimal configuration.
**Why Spring Boot ov...
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23What is the difference between JDK, JRE, and JVM?
This is one of the most common Java interview questions.
**JVM (Java Virtual Machine):**
- Executes Java bytecode
- Platform-specific (Wind...
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24What is the OWASP Top 10 and why does every developer need to know it?
OWASP Top 10 is the list of the 10 most critical web application security risks, updated every few years.
**2021 OWASP Top 10:**
1. Broken ...
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25What is a firewall and how does it work?
A firewall is a network security system that monitors and controls incoming/outgoing traffic based on predefined rules.
**Types of firewall...
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26What certifications should I get to become an ethical hacker?
Here's the recommended certification path for ethical hacking:
**Beginner (Start here):**
- **CompTIA Security+** — foundational security...
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27What is SQL injection and how do you prevent it?
SQL injection is an attack where malicious SQL code is inserted into an input field to manipulate the database.
**Example attack:**
```
Use...
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28What is the difference between ethical hacking and penetration testing?
These terms are often used interchangeably but have subtle differences:
**Ethical Hacking:**
- Broad term for any authorised hacking activi...
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29What is Azure DevOps and how is it used?
Azure DevOps is Microsoft's all-in-one DevOps platform covering the full software development lifecycle.
**5 main services:**
1. **Azure Bo...
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30What is Azure Active Directory (Azure AD / Entra ID)?
Azure Active Directory (now called Microsoft Entra ID) is Microsoft's cloud-based identity and access management service.
**Key features:**...
