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System Design Objective Questions and Answers

Test your skills with Java system design objective questions with answers and detailed explanations. Covers scalable Java architectures, Spring Boot microservices, concurrency, caching, messaging, reactive systems, resiliency patterns, cloud-native design, observability, and performance tuning.

This Java System Design quiz contains carefully curated objective questions with correct answers and clear explanations. It is designed for backend engineers, platform engineers, and architects to test your skills across scalable Java architectures, distributed systems, concurrency models, resiliency patterns, cloud-native deployments, and modern performance trade-offs.

Practice System Design MCQs with Detailed Explanations

Answer at least 12 questions to submit.

1.
Which load balancing strategy best handles uneven response times across Spring Boot instances?
Medium
2.
Which caching pattern in Java microservices minimizes cache stampede during hot-key expiration?
High
3.
In a Java-based distributed system, which CAP choice is commonly preferred for user-facing services requiring high availability?
Medium
4.
Which Java concurrency primitive best supports high-throughput non-blocking pipelines in modern services?
Medium
5.
Which JVM-level tuning primarily reduces GC pause impact for latency-sensitive services?
High
6.
Which resiliency pattern prevents cascading failures in Java microservices?
Medium
7.
Which messaging pattern improves decoupling and scalability between Java services?
Medium
8.
Which design choice best improves write scalability in a high-throughput Java service storing time-series data?
High
9.
Which approach reduces tail latency in fan-out Java services calling multiple downstream dependencies?
High
10.
Which data access pattern reduces load on primary databases in read-heavy Java applications?
Medium
11.
Which pattern ensures exactly-once effect processing semantics at the application level in Java consumers?
High
12.
Which approach best prevents connection pool exhaustion in high-QPS Java services?
High
13.
Which storage choice best supports horizontally scalable session management in Spring Boot?
Medium
14.
Which consistency model is typically acceptable for feed or notification systems built in Java microservices?
Medium
15.
Which Java I/O model scales better for high-concurrency network servers?
Medium
Answered: 0 / 15

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