AceStack AI Open interactive practice

Public task directory

Technical interview practice tasks

Every entry below is a crawlable link to a unique public task page. This directory complements the interactive filters and keeps the complete catalog connected through standard pagination.

Page 5 of 386 · 18,491 tasks

Coding (Algo) · Medium · 30 min

Closest Pair Total

Algorithm: Two pointers Difficulty: Medium Time: 30 minutes Goal Return the minimum absolute difference between target and the sum of two entries at distinct indexes.

Coding (Algo) · Medium · 40 min

Count Measurement Pairs Below a Limit

Algorithm: Two pointers Difficulty: Medium Time: 40 minutes Goal Count unordered pairs of distinct input positions whose value sum is no greater than the target limit.

Coding (Algo) · Medium · 30 min

Detect a Repeating Chain

Algorithm: Two pointers Difficulty: Medium Time: 30 minutes Goal Return whether repeated next-pointer traversal starting at head enters a cycle using constant extra memory.

Coding (Algo) · Medium · 40 min

Find the Widest Supported Container

Algorithm: Two pointers Difficulty: Medium Time: 40 minutes Goal Return the largest area defined by any two distinct supports in the supplied height sequence.

Coding (Algo) · Medium · 35 min

Merge Offline Revisions

Algorithm: Two pointers Difficulty: Medium Time: 35 minutes Goal Merge both lists without re-sorting and resolve equal-version conflicts in favor of the server.

Coding (Platform) · Easy · 35 min

Searchable Project List

Workspace: Angular Difficulty: Easy Time: 35 minutes Context You maintain the Projects page of an internal team workspace. Teammates use its search field to find an active project before.

Coding (Platform) · Hard · 90 min

Optimistic Seat Reservations

Workspace: Angular Difficulty: Hard Time: 90 minutes Context A team lead uses the Projects page to reserve available places for teammates on several projects. Clicking Reserve immediately.

Coding (Platform) · Medium · 60 min

Race Safe Project Search

Workspace: Angular Difficulty: Medium Time: 60 minutes Context A support agent uses the Projects page to find the project named in a customer ticket. Each change to the search field requests.

Behavioral · Easy · 4 min

Tell me about starting from an important but vague goal. What did you clarify first, and what did you deliberately leave open

Tell me about starting from an important but vague goal. What did you clarify first, and what did you deliberately leave open?

Behavioral · Easy · 4 min

Describe a meaningful requirement change after implementation began. How did you reassess instead of simply absorbing more scope

Describe a meaningful requirement change after implementation began. How did you reassess instead of simply absorbing more scope?

Behavioral · Medium · 4 min

Tell me about a decision where user evidence pointed in different directions. How did you choose what to believe and what to test next

Tell me about a decision where user evidence pointed in different directions. How did you choose what to believe and what to test next?

Behavioral · Medium · 4 min

Describe taking responsibility in a domain you did not yet understand. How did you become effective without pretending certainty

Describe taking responsibility in a domain you did not yet understand. How did you become effective without pretending certainty?

Behavioral · Medium · 4 min

Tell me about delivering around a dependency whose date and interface were uncertain. What did you decouple, and what remained blocked

Tell me about delivering around a dependency whose date and interface were uncertain. What did you decouple, and what remained blocked?

Behavioral · Medium · 4 min

Describe a strategic change that invalidated part of your committed work. How did you preserve useful learning and reset expectations

Describe a strategic change that invalidated part of your committed work. How did you preserve useful learning and reset expectations?

Behavioral · Hard · 4 min

Tell me about a consequential decision you made before complete data was available. What made acting safer than waiting

Tell me about a consequential decision you made before complete data was available. What made acting safer than waiting?

Behavioral · Hard · 4 min

Describe a period of repeated change that was confusing the team. What operating clarity did you create without promising false stability

Describe a period of repeated change that was confusing the team. What operating clarity did you create without promising false stability?

Behavioral · Easy · 4 min

Tell me about a technical disagreement with a peer. How did you discover what you actually disagreed about and reach a decision

Tell me about a technical disagreement with a peer. How did you discover what you actually disagreed about and reach a decision?

Behavioral · Easy · 4 min

Describe a time you disagreed with your manager’s proposed direction. How did you challenge it and support the final decision

Describe a time you disagreed with your manager’s proposed direction. How did you challenge it and support the final decision?

Behavioral · Medium · 4 min

Tell me about conflict between product value and engineering risk. How did you help both sides make a real trade-off

Tell me about conflict between product value and engineering risk. How did you help both sides make a real trade-off?

Behavioral · Medium · 4 min

Describe a conversation where feedback triggered defensiveness, from you or someone else. How did you restore a useful discussion

Describe a conversation where feedback triggered defensiveness, from you or someone else. How did you restore a useful discussion?

Behavioral · Medium · 4 min

Tell me about an ownership conflict during a high-pressure incident. How did you protect recovery while resolving accountability

Tell me about an ownership conflict during a high-pressure incident. How did you protect recovery while resolving accountability?

Behavioral · Medium · 4 min

Describe a decision that stakeholders kept reopening. How did you distinguish new evidence from unresolved disagreement

Describe a decision that stakeholders kept reopening. How did you distinguish new evidence from unresolved disagreement?

Behavioral · Hard · 4 min

Tell me about a conflict shaped by different working norms or professional language. How did you avoid misreading intent

Tell me about a conflict shaped by different working norms or professional language. How did you avoid misreading intent?

Behavioral · Hard · 4 min

Describe a conflict between other teams that threatened your outcome. When did you mediate, and when did you escalate

Describe a conflict between other teams that threatened your outcome. When did you mediate, and when did you escalate?

Behavioral · Easy · 4 min

Tell me about a high-pressure release with material risk. What did you require before proceeding, and what could stop the launch

Tell me about a high-pressure release with material risk. What did you require before proceeding, and what could stop the launch?

Behavioral · Easy · 4 min

Describe a critical dependency failing close to a deadline. How did you choose between waiting, degrading, or changing scope

Describe a critical dependency failing close to a deadline. How did you choose between waiting, degrading, or changing scope?

Behavioral · Medium · 4 min

Tell me about discovering a serious risk late in validation. How did you prevent schedule pressure from deciding by default

Tell me about discovering a serious risk late in validation. How did you prevent schedule pressure from deciding by default?

Behavioral · Medium · 4 min

Describe an operational risk that had not caused an incident yet. How did you decide whether and when to act

Describe an operational risk that had not caused an incident yet. How did you decide whether and when to act?

Behavioral · Medium · 4 min

Tell me about designing a rollback or fallback for a change. Which state could not be safely reversed, and how did that shape delivery

Tell me about designing a rollback or fallback for a change. Which state could not be safely reversed, and how did that shape delivery?

Behavioral · Medium · 4 min

Describe balancing a security concern against delivery urgency. How did you avoid both panic and unsafe compromise

Describe balancing a security concern against delivery urgency. How did you avoid both panic and unsafe compromise?

Behavioral · Hard · 4 min

Tell me about delivery risk no single team could solve alone. How did you create a complete mitigation plan

Tell me about delivery risk no single team could solve alone. How did you create a complete mitigation plan?

Behavioral · Hard · 4 min

Describe a time you recommended stopping or delaying a visible launch. What evidence justified the cost

Describe a time you recommended stopping or delaying a visible launch. What evidence justified the cost?

Behavioral · Easy · 4 min

Tell me about a decision made with good intent that produced a poor outcome. When did you realize it was going wrong

Tell me about a decision made with good intent that produced a poor outcome. When did you realize it was going wrong?

Behavioral · Easy · 4 min

Describe a time evidence was available but you failed to act on it. Why did you miss it, and what changed afterward

Describe a time evidence was available but you failed to act on it. Why did you miss it, and what changed afterward?

Behavioral · Medium · 4 min

Tell me about a production incident caused partly by your work. What did you do during recovery and after the immediate fix

Tell me about a production incident caused partly by your work. What did you do during recovery and after the immediate fix?

Behavioral · Medium · 4 min

Describe work that continued longer than it should have. What evidence eventually made you stop or redirect it

Describe work that continued longer than it should have. What evidence eventually made you stop or redirect it?

Behavioral · Medium · 4 min

Tell me about an estimate that was materially wrong. What assumption failed, and how did you change planning behavior

Tell me about an estimate that was materially wrong. What assumption failed, and how did you change planning behavior?

Behavioral · Medium · 4 min

Describe difficult feedback that exposed a blind spot in how you worked. What observable behavior changed

Describe difficult feedback that exposed a blind spot in how you worked. What observable behavior changed?

Behavioral · Hard · 4 min

Tell me about solving one problem while unintentionally creating another. How did you reason about the second-order effect

Tell me about solving one problem while unintentionally creating another. How did you reason about the second-order effect?

Behavioral · Hard · 4 min

Describe a failure whose lesson mattered beyond your immediate team. How did you share it without creating blame or noise

Describe a failure whose lesson mattered beyond your immediate team. How did you share it without creating blame or noise?

Behavioral · Easy · 4 min

Tell me about difficult feedback you gave a peer. How did you make it actionable and protect the working relationship

Tell me about difficult feedback you gave a peer. How did you make it actionable and protect the working relationship?

Behavioral · Easy · 4 min

Describe feedback you initially thought was wrong. How did you test it before deciding what to change

Describe feedback you initially thought was wrong. How did you test it before deciding what to change?

Behavioral · Medium · 4 min

Tell me about noticing a teammate was blocked but not asking for help. How did you support them without taking over

Tell me about noticing a teammate was blocked but not asking for help. How did you support them without taking over?

Behavioral · Medium · 4 min

Describe a collaboration process that became a bottleneck. How did you improve flow without lowering the quality bar

Describe a collaboration process that became a bottleneck. How did you improve flow without lowering the quality bar?

Behavioral · Medium · 4 min

Tell me about making async collaboration work across time zones. Which behavior from you produced a measurable improvement

Tell me about making async collaboration work across time zones. Which behavior from you produced a measurable improvement?

Behavioral · Medium · 4 min

Describe a time a dissenting teammate improved the result. What did you do to make their evidence part of the decision

Describe a time a dissenting teammate improved the result. What did you do to make their evidence part of the decision?

Behavioral · Hard · 4 min

Tell me about rebuilding collaboration after ownership or team structure changed. What operating agreement mattered most

Tell me about rebuilding collaboration after ownership or team structure changed. What operating agreement mattered most?

Behavioral · Hard · 4 min

Describe a collaboration improvement that spread beyond your immediate team. How did you know adoption was real

Describe a collaboration improvement that spread beyond your immediate team. How did you know adoption was real?