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Pick your role, the round and an interviewer, then answer out loud. It follows up on the weak part of your answer, watches you code, and hands you a rubric-scored replay when you are done.
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Sit a complete mock of IELTS, TOEFL, PTE or the Duolingo English Test, section by section. You get the band you would have got, and whether to book yet.
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MockLive Roleplay
Someone who pushes back. A debrief that quotes you.
The discovery call, the price objection, the feedback nobody wants to give. A live call with someone who pushes back, then a debrief that quotes what you said and what it cost you.
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Kai
Staff Engineering Manager
Interviews · System design round
Kai asks: “Walk me through a system you designed and the trade-offs you made under load.” You answer: “We sharded by tenant, so one hot customer couldn’t take the cluster down. The cost was cross-tenant reporting, which I moved to a nightly job…”
You · live transcript
47 languagesAfter the session
The score is the one you would have got, not the one you would like. A quote appears in the report only if you said it, and the video is yours alone.
Technical communication
82/100
Engineering depth
74/100
Ownership
68/100
Answer 4 of 9 · as said, at 12:04
“We, um, basically sharded it and it kind of worked, so the team was happy with that.”
“We” hides your decision. No numbers, no failure mode, and the trade-off you mentioned earlier never came back.
Say instead: “I sharded by tenant. It cut p99 from 1.8s to 300ms, and the cost was cross-tenant reporting, which I moved to a nightly job.”
An exam score is the band you would have got. An interview score is against the rubric the round is really graded on.
Every quote in a report is something you said, with the timestamp you said it at.
Recordings and transcripts are yours. Your slides render in your browser and the file is never stored.
Inside the room
Most voice AI waits for silence, then writes a reply, then reads it out. Ours decides you have finished from what you said, and starts the reply while you are still trailing off. One turn, measured end to end, looks like this.
01
A turn model decides when you have finished from what you said. It holds through a mid-thought pause and releases on a completed answer.
02
The reply is drafted and its first sentence synthesised while you are still trailing off. A wrong guess is cancelled before you hear a word of it.
03
Interrupt when you need to, the way you would a person. Echo from laptop speakers is filtered, so it works without headphones.
04
A fast model drives the live conversation. A deeper one scores the whole session afterwards. Speed in the room, rigour in the report.
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