Interview Questions

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6,535 questions
547 companies
49 roles
Last updated Nov 2026

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Senior Full Stack EngineerNetflix·6 questions

Find the next term of the sequence 4, 2, 6, 6, 30, 150.
2 years ago
Find the next term of the sequence 1, 3, 7, 17, 41, 99.
2 years ago
A stock is at $100 and each day a coin flip moves it up $1 on Heads or down $1 on Tails. What is the probability it is exactly $100 after 10 days?
2 years ago
A survey of 1,000 people records preferred exercise (run, bike, swim, other) by age band. You meet a respondent who prefers biking. What is the probability they are aged 23 to 27?
10 months ago
You have 2 tokens and want 5, betting each turn as much as you can without overshooting 5. Each bet wins with probability 1/3. What is the probability you reach 5?
10 months ago
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30% of stories on a site are fake. A fake story reaches 100 likes with probability 80%, a real one with 8%. Given a story reached 100 likes, what is the probability it is fake?
10 months ago
Two teams each build a near and a far tower using dollies of bricks, one action a day. You win when both your towers beat the opponent's at the same site. How do you play?
10 months ago
Five face-down cards hold five consecutive integers. On each of five turns you flip a card or guess a hidden card's value, one point per correct guess. What is the best strategy?
3 years ago
Alex and Blake each flip a coin until they get their first heads. Given that Alex needed fewer flips than Blake, what is Alex's expected number of flips?
2 years ago
20-sided die, 100 rounds: each round either roll, or take the face value in dollars, after which the die is removed until you spend a round rolling again. How should you play?
20 hours ago
How many prime numbers are there from 1 to 999?
10 months ago
What are L1 and L2 regularisation, and when would you use each?
+120 hours ago
Which exchanges do you trade on?
2 years ago
Suppose you can forecast an external shock before it happens. How would you turn that forecast into an alpha?
2 years ago
What is an alpha? What is a net long-short alpha?
2 years ago
A stick is cut at two random points, giving three pieces. What is the probability that the three pieces can form a triangle?
20 hours ago
In an array every element is at most k positions away from where it belongs in sorted order. What is the fastest way to sort it?
+120 hours ago
How many times in one day are the second hand and the minute hand of a clock perpendicular to each other?
4 years ago
Financial text often covers several companies at once. How would you find the main companies, extract the passages about each, and strip boilerplate?
2 years ago
What is the expected number of inversions in a uniformly random permutation of n elements?
2 years ago

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Interview Questions

Find the next term of the sequence 4, 2, 6, 6, 30, 150.

Find the next term of the sequence 1, 3, 7, 17, 41, 99.

A stock is at $100 and each day a coin flip moves it up $1 on Heads or down $1 on Tails. What is the probability it is exactly $100 after 10 days?

A survey of 1,000 people records preferred exercise (run, bike, swim, other) by age band. You meet a respondent who prefers biking. What is the probability they are aged 23 to 27?

You have 2 tokens and want 5, betting each turn as much as you can without overshooting 5. Each bet wins with probability 1/3. What is the probability you reach 5?

30% of stories on a site are fake. A fake story reaches 100 likes with probability 80%, a real one with 8%. Given a story reached 100 likes, what is the probability it is fake?

Two teams each build a near and a far tower using dollies of bricks, one action a day. You win when both your towers beat the opponent's at the same site. How do you play?

Five face-down cards hold five consecutive integers. On each of five turns you flip a card or guess a hidden card's value, one point per correct guess. What is the best strategy?

Alex and Blake each flip a coin until they get their first heads. Given that Alex needed fewer flips than Blake, what is Alex's expected number of flips?

20-sided die, 100 rounds: each round either roll, or take the face value in dollars, after which the die is removed until you spend a round rolling again. How should you play?

How many prime numbers are there from 1 to 999?

What are L1 and L2 regularisation, and when would you use each?

Which exchanges do you trade on?

Suppose you can forecast an external shock before it happens. How would you turn that forecast into an alpha?

What is an alpha? What is a net long-short alpha?

A stick is cut at two random points, giving three pieces. What is the probability that the three pieces can form a triangle?

In an array every element is at most k positions away from where it belongs in sorted order. What is the fastest way to sort it?

How many times in one day are the second hand and the minute hand of a clock perpendicular to each other?

Financial text often covers several companies at once. How would you find the main companies, extract the passages about each, and strip boilerplate?

What is the expected number of inversions in a uniformly random permutation of n elements?

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