Allstate Software Engineer candidates report Java and concurrency questions, LRU Cache and longest-substring coding problems, a group app-design challenge, and a manager round on past project work. Reports show two to three rounds.
$90K
Avg. Base Comp
$125K
Avg. Total Comp
2-3 rounds
Typical Rounds
Not reported
Process Length
Allstate's Software Engineer interview is centered on Java, but the format depends on who you ask. One candidate described two rounds: a technical screen followed by a manager round. Another described three stages: a CV review, a group challenge and a technical interview. Plan for either shape.
The technical screen opened with Java and Spring Boot basics and a simple programming problem, then moved to longest substring without repeating characters and an LRU Cache design and implementation. Interviewers pushed on time complexity and edge cases, then on HashMap internals, ConcurrentHashMap versus HashMap, fail-fast versus fail-safe, synchronized versus Lock, volatile versus atomic, thread pools, deadlock detection and prevention, and producer-consumer.
The manager round was practical. The candidate was asked about the real-time project they were working on, the architecture they chose and the design patterns involved, plus where instance and local variables are stored in memory. That candidate did not receive an offer.
The other route started with a group challenge to design an app, where interviewers watched how each person engaged with the group. A relaxed technical interview followed, covering object-oriented programming and Java, including reading a class to spot what was missing, and a story about solving a difficult problem. That candidate accepted an offer.
To prepare, practice explaining Java internals out loud, work through the two coding problems, and be ready to describe your own project's architecture simply. In a group exercise, propose a structure and draw quieter people into the discussion.
Synthesized from 7 candidate reports by our editorial team.
Had an interview recently?
Share your experience. Unlock the full guide.
Real interview reports from people who went through the Allstate process.
Share your own interview experience to unlock all reports, or subscribe for full access.
Sourced from candidate reports and verified by our team.
Topics based on recent interview experiences.
Featured question at Allstate
Create top_ads with the top 3 ads and return the row counts for inner, left, right, and cross joins with ads
| Question | |
|---|---|
| RAG Strict Source Control | |
| Integer String Addition | |
| The Longest Journey | |
| Why Do You Want to Work With Us | |
| Your Strengths and Weaknesses | |
| Kindergarten Feasibility | |
| LRU Cache 1 | |
| 2nd Highest Salary | |
| Employee Salaries | |
| Bagging vs Boosting | |
| Random SQL Sample | |
| P-value to a Layman | |
| Hurdles In Data Projects | |
| Type-ahead Search | |
| Cyclic Detection | |
| Three Zebras | |
| Precision and Recall | |
| Success Measurement | |
| Target Indices | |
| Transformer Encoder Layer | |
| Duplicate Rows | |
| Modifying a Billion Rows | |
| Type I and II Errors | |
| Same Characters | |
| Swap Variables | |
| Employee Benefits Outreach | |
| Triangle as Binary Array | |
| Blob Indexing | |
| Drink Production Allocation |
Synthesized from candidate reports. Individual experiences may vary.
One Software Engineer candidate began with a CV review that checked their background against the role, so be specific about what you built. Next came a group challenge to design an app. Interviewers watched how each person engaged, so propose structure, ask questions and bring quieter teammates into the discussion.
Another Software Engineer candidate had a technical screen with Java and Spring Boot basics and a simple programming problem. Coding prompts were longest substring without repeating characters and an LRU Cache. Follow-ups covered complexity, edge cases, HashMap internals, synchronized versus Lock, volatile versus atomic, thread pools, deadlocks and producer-consumer.
The final stage for the candidate who went through the group challenge was a friendly technical interview. It covered object-oriented programming and Java, including reading a class and identifying what was missing, plus a question about a time they solved a difficult problem. Communication was part of the evaluation, so explain your reasoning as you go.
In the two-round process, the second round was with a manager and focused on the candidate's current work. Questions covered the real-time project they were building, the architecture they used and the design patterns involved. They also asked where instance variables and local variables are stored in memory. Prepare a clear, simple walkthrough of one project.
