Help Center
Answers to common questions. Can't find yours? Contact us.
Getting Started
What is FastFlipFlop?
FastFlipFlop is a practice platform for hardware and electrical engineering interviews. Browse a categorized question bank, sketch your answer on an interactive schematic board, then compare it with a detailed worked solution.
Do I need an account to practice?
You can try a selection of free questions without an account. Creating a free account unlocks more questions and lets you save sketches, track completed questions, and build a practice streak. Premium unlocks the full bank see the Premium page.
How should I use a question?
Read the prompt, think it through on your own first, and sketch your answer on the drawing board just like a whiteboard round. Use hints if you get stuck, then reveal the solution and compare the reasoning, not just the final circuit.
The Drawing Board
How do I place and connect components?
Drag components from the palette onto the board, then drag from one pin to another to wire them. Wires snap to pins, and you can rotate components in 90° steps from the toolbar.
Is my sketch saved?
If you're signed in, your sketch for each question is saved to your account automatically, so you can pick up where you left off on any device.
What is the connection point tool?
It adds an anchor point onto an existing wire so you can branch off from the middle of a connection handy for fan-out nets like clocks and resets.
Account & Progress
How do completions and favorites work?
On the questions page, tick the checkbox next to a question to mark it completed, or tap the star to favorite it. Both are filters on the browse page, and your profile shows overall progress per category.
What is the practice streak?
Every day you work on a question is logged to your streak calendar on the Practice page. It's a simple way to keep yourself consistent before an interview loop.
I forgot my password.
Use the forgot password page and we'll email you a reset link.
Premium & Billing
What does Premium include?
The full question bank, company-specific question filters, all worked solutions, and early access to new content. Details and pricing are on the Premium page.
Can I cancel anytime?
Yes Premium is billed monthly and you can cancel whenever you like. You keep access until the end of the period you paid for.