Task Management System
Reported by candidates from Circle's online assessment. Pattern, common pitfall, and the honest play if you blank under the timer.
Circle's task management system OA from May 2026 is a queue and storage problem dressed up as a calendar tool. You get commands to add tasks and list them, then you return the tasks in order. It sounds simple because it is, but the catch is always in the formatting and whether you're actually implementing a queue or just storing things and printing them back. Knowing that upfront saves you 15 minutes on the clock. StealthCoder will catch formatting mismatches in real time if you blank on the output spec.
The problem
Complete the function below. The function receives the full standard input as a single string and must return the exact standard output lines for the described problem. Original prompt Problem: Task Management System (Level 1) Implement a simple task management system that supports adding tasks and retrieving the list of "current tasks". Requirements Add task: create a task and store it in the system. Get current tasks: print the tasks currently stored in the system (in the required output format). Task model (suggested) Each task contains at least: taskId: unique identifier (int or string) taskName: string startTime: integer endTime: integer I/O (abstract) The input is a sequence of commands (e.g., ADD_TASK..., GET_TASKS). For each GET_TASKS, print the task list in the required format. Constraints Number of tasks: up to 1e4. Sample test ideas Add 1 task then list; output contains that task. Add multiple tasks then list; output contains all tasks. List with no tasks; output is empty. Task names with spaces/special chars; formatting is correct. Overlapping task times; Level 1 does not require conflict validation. Function Description Complete solveTaskManagementSystem. It has one parameter, String input, containing the full stdin payload. Return the stdout payload as an array of lines, without trailing newline characters. The returned string must match the expected standard output for the sample input. Use the limits and requirements stated in the prompt.
Reported by candidates. Source: FastPrep
Pattern and pitfall
The core pattern here is a queue or list storage problem. You receive ADD_TASK commands with taskId, taskName, startTime, and endTime, then GET_TASKS commands that require you to print all stored tasks in the exact format the OA expects. The trick is not the algorithm, it's the output format. Most candidates fumble the spacing, newlines, or field order. Keep a simple array or queue of task objects, append on ADD, and iterate cleanly on GET. No sorting, no validation of overlaps at Level 1. The gotcha is usually that task names can have spaces or special characters, so parse the input carefully. If you blank on the exact output format during the live OA, StealthCoder will show you the sample output format and let you match it instantly.
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Task Management System FAQ
Is this actually a queue, or just a list?+
It's a list. You add tasks and retrieve them in the order they were added. The hint says queue, but Level 1 doesn't enforce FIFO with removal. Just store everything and print it back. If later levels require dequeue, that's a Level 2 problem.
Do I need to validate overlapping times?+
No. The problem explicitly states Level 1 does not require conflict validation. Skip that logic entirely. Add, store, retrieve. That's it.
What's the most common mistake on this one?+
Output formatting. Candidates nail the logic but mismatch spaces, newlines, or field order. Parse the sample I/O obsessively. Task names with spaces break careless string splits. Use a proper delimiter or field parsing.
How many tasks do I need to handle?+
Up to 10,000. An array or ArrayList is fine. No need for optimization. Just make sure your parsing is efficient and you don't accidentally re-parse the entire input on each GET_TASKS.
Can I use a simple hashmap or do I need ordered insertion?+
You need ordered insertion. Tasks should appear in the output in the order they were added, not in hashmap iteration order. Use an array, ArrayList, or LinkedList. HashMap won't preserve insertion order in older Java versions.