Data Analyst

Please tell us about the companies you have worked for, which blocks you were responsible for. Maybe you can share some successful cases?

In what form was the API contract described? What sections did the specification consist of?

Middle

СБЕР

Why did you leave the construction company? Was it boring?

Does it make sense to train gradient boosting on linear models instead of trees?

Was it your idea to create a dashboard for the commercial department?

Tell me about indexes in ClickHouse.

What tasks would interest you at a new job?

Why is there such frequent job change (transitions every 7-9-12 months)? What was unsatisfactory, did expectations and reality not match?

What is a semi-join and anti-join? Why are they needed and where are they applied?

Return a list of the same size for a list of integers, where at the i-th position – the product of all elements of the list except the element at position i of the original list. Examples: [2, 3, 4] -> [3*4, 2*4, 2*3] -> [12, 8, 6] def product_except_self(nums: list[int]) -> list[int]: # your code here

Intern

Яндекс

What methods do you use to keep your skills up to date? (вопрос к собеседнику в рамках парной практики)

Have you ever searched for and detected duplicates? How did you approach this process?

How do you imagine the position you applied for? What will you do, based on the job description?

Do you have any questions for us?

Junior

СБЕР

Tell me, have you ever had an experience where you had to defend your ideas and argue the benefits of a feature in front of managers or Product Owners?

Do you have a timeframe for moving to Moscow, or is it tied to job search?

Junior

СБЕР

Is it necessary to preprocess features before training logistic regression with L2 regularization, and why?

A. The Best Scientific Laboratory In a certain city, several scientific laboratories are researching bacterial cultures. They study a sequence of samples, where each sample belongs to a specific strain (type of bacteria). The chief biological research university announced a contest: to find the maximum number of consecutive samples that can be analyzed considering the restriction. Specifically: in any continuous segment of the sequence, there should be no more than K different strains. Our laboratory strives to become the best in the city. To win the contest, we need to find exactly such a maximum length of a segment that satisfies the strict condition. We are counting on you, because in case of victory, the laboratory will receive a grant that will open new horizons for our research. Input format The first line contains two numbers: N — the length of the sample sequence and K — the restriction on the number of different strains. The second line contains N numbers — the elements of the sequence. Output format The program should output the number of the maximum length of a segment of the sample sequence. Example 1 Input [phone] Output 3

Intern

Яндекс

How do you connect to a database using Python?

What will happen if thousands of connections are launched simultaneously?

Principal

101ХР