Yandex Interview Questions and Answers

Propose and calculate promo recommendations to increase GMV for matrix from q1

• Analyze sales data from q1 to identify trends and popular products

• Create targeted promotions for popular products

• Offer bundle deals to encourage customers to purchase more

• Implement a loyalty program to incentivize repeat purchases

2 powered by 8 is equal to 256.

• 2^8 = 2*2*2*2*2*2*2*2 = 256

A race condition is a situation in which the outcome of a program depends on the sequence or timing of uncontrollable events.

• Occurs when multiple threads or processes access shared data or resources concurrently

• Can lead to unpredictable behavior or bugs in the program

• Example: Two threads trying to increment the same variable simultaneously

Arrow functions are a concise way to write functions in JavaScript.

• Arrow functions are written using the '=>' syntax.

• They do not have their own 'this' keyword, instead they inherit it from the parent scope.

• They are often used for short, one-line functions.

• Example: const add = (a, b) => a + b;

Decision trees algorithm is a popular machine learning technique used for classification and regression tasks.

• Decision trees are a type of supervised learning algorithm that is used for both classification and regression tasks.

• They work by recursively splitting the data into subsets based on the most significant attribute.

• Each internal node represents a test on an attribute, each branch represents the outcome of the test, and each leaf node represents the class label or the t...read more

Linear regression is a statistical method used to model the relationship between a dependent variable and one or more independent variables.

• Linear regression finds the best-fitting straight line through the data points.

• It is used to predict the value of the dependent variable based on the independent variable(s).

• The equation of a simple linear regression model is y = mx + b, where y is the dependent variable, x is the independent variable, m is the slope, and b is the interce...read more

Priority and severity are key concepts in QA QC, with priority referring to the importance of fixing a bug and severity indicating the impact of the bug on the system.

• Priority is the order in which bugs should be fixed based on their importance to the system

• Severity is the impact of a bug on the system's functionality

• Priority is usually assigned by the project manager or team lead

• Severity is typically determined by the QA engineer based on the bug's impact

• Examples: A critical...read more