Java Networking (Sockets & HTTP) - Practice Questions 2026

Master the complexities of network communication with the most comprehensive Java Networking (Sockets & HTTP) Practice Exams for 2026, Whether you are preparing for a technical interview, a university exam, or a professional certification, these practice tests are designed to bridge the gap between theoretical knowledge and production-grade implementation,Why Serious Learners Choose These Practice ExamsNavigating the world of java,net and java,net,http requires more than just memorizing syntax; it requires a deep understanding of protocols, data streams, and concurrency, Serious learners choose this course because it offers:Deep Technical Insight: We do not just provide answers; we provide the "why" behind every networking handshake and request,Up-to-Date Content: Fully updated for 2026, covering modern HTTP/2 and HTTP/3 features alongside legacy Socket implementations,Scenario-Based Learning: Questions are modeled after real-world debugging sessions and architectural challenges,Course StructureThis course is organized into a progressive learning path to ensure you build a solid foundation before tackling high-level networking architecture,Basics / Foundations: This section focuses on the fundamental building blocks of networking in Java, You will be tested on IP addresses, Ports, URL vs URI classes, and the basic lifecycle of a network connection, In this module, we ensure you understand how names are resolved to addresses and how various protocol schemes function at a high level,Core Concepts: Here, we dive into the Transmission Control Protocol (TCP), You will encounter questions regarding ServerSocket and Socket classes, handling input and output streams, and basic client-server communication, Understanding the handshake and data integrity is the focus of this specific segment,Intermediate Concepts: This module introduces User Datagram Protocol (UDP) using DatagramPacket and DatagramSocket, We also cover multi-threaded servers, ensuring you understand how to handle multiple clients simultaneously without blocking, This is critical for scaling networked applications efficiently,Advanced Concepts: Focuses on the modern Java HTTP Client API introduced in Java 11 and enhanced in later versions, Topics include asynchronous requests, body handlers, web sockets, and managing SSL/TLS security configurations to protect data in transit,Real-world Scenarios: This section challenges you with troubleshooting common networking issues such as timeouts, connection refused errors, data corruption, and latency management in distributed systems, We look at how real production environments behave under stress,Mixed Revision / Final Test: A comprehensive simulation of a professional exam, pulling questions from all previous sections to test your retention and speed under pressure, This ensures you are ready for any question format you might face,Sample QuestionsQUESTION 1Which of the following classes should be used to create a server-side application that listens for incoming TCP connection requests on a specific port?OPTION 1: java,net,SocketOPTION 2: java,net,ServerSocketOPTION 3: java,net,DatagramSocketOPTION 4: java,net,HttpURLConnectionOPTION 5: java,net,InetAddressCORRECT ANSWER: OPTION 2CORRECT ANSWER EXPLANATION: The ServerSocket class is specifically designed to wait for requests to come in over the network, It listens on a specified port and, when a connection is made, it returns a Socket object via the accept() method to facilitate communication,WRONG ANSWERS EXPLANATION:OPTION 1: Socket is used by the client to initiate a connection or by the server to communicate after a connection is accepted, but it does not "listen" for new connections,OPTION 3: DatagramSocket is used for UDP communication, which is connectionless and does not use the "listen/accept" model of TCP,OPTION 4: HttpURLConnection is a high-level class used specifically for making HTTP requests, not for creating a raw TCP server,OPTION 5: InetAddress is a utility class used to represent IP addresses, not for handling network I/O,QUESTION 2When using the modern Java HTTP Client (java,net,http,HttpClient), which method is used to send a request asynchronously?OPTION 1: send()OPTION 2: execute()OPTION 3: sendAsync()OPTION 4: connectAsync()OPTION 5: openConnection()CORRECT ANSWER: OPTION 3CORRECT ANSWER EXPLANATION: The sendAsync() method in the HttpClient class returns a CompletableFuture, allowing the thread to continue execution without waiting for the server response, This is a fundamental feature of the non-blocking API,WRONG ANSWERS EXPLANATION:OPTION 1: send() is a synchronous method that blocks the current thread until the response is received,OPTION 2: execute() is commonly found in third-party libraries like Apache HttpClient but is not a method in the standard Java HttpClient API,OPTION 4: connectAsync() is not a standard method in the Java HTTP Client API for sending requests,OPTION 5: openConnection() is a method of the older URL class, used to get a URLConnection object,QUESTION 3What is the primary difference between TCP and UDP as implemented in Java Sockets?OPTION 1: TCP is faster than UDP,OPTION 2: UDP guarantees delivery, whereas TCP does not,OPTION 3: TCP is connection-oriented, while UDP is connectionless,OPTION 4: UDP uses ServerSocket and TCP uses DatagramSocket,OPTION 5: Java does not support UDP,CORRECT ANSWER: OPTION 3CORRECT ANSWER EXPLANATION: TCP (Transmission Control Protocol) requires a handshake to establish a connection before data can be sent, ensuring reliability, UDP (User Datagram Protocol) simply sends packets to a destination without verifying if the receiver is ready or if the data arrived,WRONG ANSWERS EXPLANATION:OPTION 1: Generally, UDP is faster because it lacks the overhead of error checking and connection management,OPTION 2: This is the opposite of the truth; TCP guarantees delivery and order, while UDP does neither,OPTION 4: These are swapped, TCP uses ServerSocket and UDP uses DatagramSocket,OPTION 5: Java has robust support for UDP through the java,net package,Welcome to the best practice exams to help you prepare for your Java Networking (Sockets & HTTP)- Practice Questions 2026,You can retake the exams as many times as you wantThis is a huge original question bankYou get support from instructors if you have questionsEach question has a detailed explanationMobile-compatible with the Udemy app30-days money-back guarantee if you're not satisfiedWe hope that by now you're convinced! And there are a lot more questions inside the course,