Allied Globetech Java Developer Interview Questions and Answers

UDP is a connectionless protocol that enables fast, low-latency communication, ideal for real-time applications like streaming.

• Connectionless Protocol: UDP does not establish a connection before sending data, reducing latency, which is crucial for real-time applications.

• Low Overhead: UDP has minimal protocol overhead compared to TCP, allowing for faster data transmission, beneficial for streaming audio and video.

• N...read more

Encryption and decryption methods can be applied at various layers of the OSI model to secure data transmission.

• Application Layer: Use of SSL/TLS for encrypting HTTP traffic (HTTPS).

• Transport Layer: Implementation of secure protocols like DTLS for UDP traffic.

• Network Layer: IPsec can encrypt data packets for secure communication over IP.

• Data Link Layer: WPA2 encrypts data in wireless networks to protect against ea...read more

The TCP/IP suite is a practical framework for networking, while the OSI model is a theoretical framework for understanding network protocols.

• Layer Count: TCP/IP has 4 layers (Application, Transport, Internet, Network Interface) while OSI has 7 layers (Application, Presentation, Session, Transport, Network, Data Link, Physical).

• Model Type: TCP/IP is a protocol suite used in real-world applications, whereas OSI is a...read more

Cryptography encompasses encryption and other techniques for secure communication, while encryption specifically refers to data transformation.

• Cryptography is a broader field that includes techniques like hashing, digital signatures, and key exchange.

• Encryption is a specific method within cryptography that transforms data to prevent unauthorized access.

• Example of encryption: AES (Advanced Encryption Standard) is w...read more

Data Structures and Algorithms optimize data management and processing, enhancing performance and efficiency in programming tasks.

• Efficient data storage: Arrays, linked lists, and trees help organize data for quick access.

• Optimized searching: Algorithms like binary search reduce time complexity when finding elements in sorted data.

• Improved performance: Using appropriate data structures can significantly speed up o...read more

JAR files package Java classes and resources, enhancing distribution, versioning, and execution efficiency.

• 1. Packaging: JAR files bundle multiple Java classes and resources (like images and properties files) into a single archive, simplifying distribution.

• 2. Versioning: JAR files can include version information in their manifest, helping manage dependencies and ensuring compatibility.

• 3. Compression: JAR files use...read more

OOP in Java organizes code into objects, enhancing modularity, reusability, and maintainability.

• Encapsulation: Bundling data and methods. Example: A 'Car' class with attributes like 'speed' and methods like 'accelerate()'.

• Inheritance: Reusing code through parent-child relationships. Example: 'ElectricCar' inherits from 'Car', adding features like 'chargeBattery()'.

• Polymorphism: Methods can take many forms. Example...read more

I played a key role in developing a Java-based application, focusing on backend services and database integration.

• Designed and implemented RESTful APIs for seamless communication between frontend and backend.

• Collaborated with frontend developers to ensure smooth integration of UI components with backend services.

• Optimized database queries to improve application performance, reducing response time by 30%.

• Participat...read more