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Google · Remote · $180–240k
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session.liveLIVE
>interview.start('senior-frontend')
// matching with AI interviewer…
QExplain how useMemo can actually hurt performance.
// candidate reply received
Correct trade-off reasoning — 9.1/10
>_
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itlead.org/QuestionsLIVE
TypeScript· 44 topics
01Відмінності між type та interface
02Що таке generic у TypeScript
03Як працюють keyof та typeof
04Умовні типи (Conditional Types)
05Що таке type guard
06Mapped types у TypeScript
07Discriminated unions
08Utility types: Pick, Omit, Partial
12 / 44 read
useTimer.tsJUNIOR
compilesedge casesperf
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theoryHTML & CSS✓ 47 topics
theoryJavaScript75 topics
practiceJS Problems34 tasks
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function debounce(fn: Function, delay: number) {
let timeoutId: ReturnType<typeof setTimeout> | null;
return function(this: any, ...args: any[]) {
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timeoutId = setTimeout(() => {
fn.apply(this, args);
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}
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I stumbled upon the platform and was surprised. Everything is in one place — not just a knowledge base, but a structured one with real examples. I wish this existed when I started.
At the interview, 90% of the questions were about things I studied here. The explanations are written in clear language. I hope the knowledge base keeps growing.
ITLead fills a real gap: structured, to the point, no fluff. Theory is immediately backed by practice — you can solve problems right in a convenient IDE.
I prepared with the platform and 70% of what I studied appeared in interviews. The problems and quizzes are pure fire.
Well-chosen theory and practice helped me feel much more confident at interviews. 100% recommended.
Thanks to this platform and the mock interviews I landed a role at a great company. Everything is sharp and structured.
The platform surprised me with how thoughtful and convenient it is. The interface makes studying comfortable and inspiring.
I used it as a checklist to spot topics I hadn't touched during prep. The highly concentrated information helps refresh material fast.
My current level is senior front-end. When I restarted my job search the platform helped me save time on preparation. The questions and answers are up to date.
Clear focus — built for practice without extra noise. Modern minimalist style, great readability, fast loading.
Thanks to this platform and the mock interviews I landed a role at a great company. Everything is sharp and structured.
The platform surprised me with how thoughtful and convenient it is. The interface makes studying comfortable and inspiring.
I used it as a checklist to spot topics I hadn't touched during prep. The highly concentrated information helps refresh material fast.
My current level is senior front-end. When I restarted my job search the platform helped me save time on preparation. The questions and answers are up to date.
Clear focus — built for practice without extra noise. Modern minimalist style, great readability, fast loading.
I stumbled upon the platform and was surprised. Everything is in one place — not just a knowledge base, but a structured one with real examples. I wish this existed when I started.
At the interview, 90% of the questions were about things I studied here. The explanations are written in clear language. I hope the knowledge base keeps growing.
ITLead fills a real gap: structured, to the point, no fluff. Theory is immediately backed by practice — you can solve problems right in a convenient IDE.
I prepared with the platform and 70% of what I studied appeared in interviews. The problems and quizzes are pure fire.
Well-chosen theory and practice helped me feel much more confident at interviews. 100% recommended.
I stumbled upon the platform and was surprised. Everything is in one place — not just a knowledge base, but a structured one with real examples. I wish this existed when I started.
At the interview, 90% of the questions were about things I studied here. The explanations are written in clear language. I hope the knowledge base keeps growing.
ITLead fills a real gap: structured, to the point, no fluff. Theory is immediately backed by practice — you can solve problems right in a convenient IDE.
I prepared with the platform and 70% of what I studied appeared in interviews. The problems and quizzes are pure fire.
Well-chosen theory and practice helped me feel much more confident at interviews. 100% recommended.
Thanks to this platform and the mock interviews I landed a role at a great company. Everything is sharp and structured.
The platform surprised me with how thoughtful and convenient it is. The interface makes studying comfortable and inspiring.
I used it as a checklist to spot topics I hadn't touched during prep. The highly concentrated information helps refresh material fast.
My current level is senior front-end. When I restarted my job search the platform helped me save time on preparation. The questions and answers are up to date.
Clear focus — built for practice without extra noise. Modern minimalist style, great readability, fast loading.
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