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I applied via Recruitment Consulltant and was interviewed in Jun 2022. There were 2 interview rounds.
SQL query to find duplicate emails in a table named person
Use GROUP BY and HAVING clause to group emails and count their occurrences
Select only those emails which have count greater than 1
Example: SELECT email, COUNT(*) FROM person GROUP BY email HAVING COUNT(*) > 1;
SQL query to find date ids with higher temperature compared to previous dates in weather table
Use self join to compare temperature of current date with previous dates
Order the table by date to ensure correct comparison
Select date ids where temperature is higher than previous dates
posted on 3 May 2023
I applied via Campus Placement and was interviewed in Nov 2022. There were 3 interview rounds.
posted on 14 Feb 2024
I applied via Campus Placement and was interviewed before Feb 2023. There were 2 interview rounds.
Leetcode hard level coding with 4-5 questions
I applied via Campus Placement and was interviewed in Sep 2024. There was 1 interview round.
Decision tree is a tree-like model of decisions and their possible consequences, while random forest is an ensemble learning method that builds multiple decision trees and merges them together.
Decision tree is a flowchart-like structure where each internal node represents a decision based on an attribute, each branch represents the outcome of the decision, and each leaf node represents a class label.
Random forest is a ...
I applied via Campus Placement and was interviewed before May 2023. There were 2 interview rounds.
It been for 45 mins. question asked from python,ML,Deep learning and maths.
Correlation measures the strength and direction of a linear relationship between two variables, while covariance measures the extent to which two variables change together.
Correlation ranges from -1 to 1, where 1 indicates a perfect positive relationship, -1 indicates a perfect negative relationship, and 0 indicates no relationship.
Covariance can be positive, negative, or zero. A positive covariance indicates that as o...
I applied via Job Portal and was interviewed in Jun 2024. There were 2 interview rounds.
Mcq based test on data science concepts
Precision and recall are metrics used to evaluate the performance of classification models.
Precision is the ratio of correctly predicted positive observations to the total predicted positive observations.
Recall is the ratio of correctly predicted positive observations to the all observations in actual class.
F1 score is the weighted average of precision and recall, where the best value is 1 and the worst is 0.
Precision ...
Dropout is a regularization technique used in neural networks to prevent overfitting by randomly setting some neuron outputs to zero during training.
Dropout is a regularization technique used in neural networks to prevent overfitting.
During training, a fraction of neurons are randomly selected and their outputs are set to zero.
This helps prevent complex co-adaptations in neurons and improves generalization.
Dropout is t...
LSTM and GRU are types of recurrent neural networks used for processing sequential data.
LSTM (Long Short-Term Memory) networks are capable of learning long-term dependencies in data.
GRU (Gated Recurrent Unit) networks are simpler than LSTM and have fewer parameters.
LSTM has three gates (input, output, forget) while GRU has two gates (update, reset).
LSTM is better at capturing long-term dependencies but is more complex,...
Hypothesis testing is a statistical method used to make inferences about a population based on sample data.
Hypothesis testing involves formulating a null hypothesis and an alternative hypothesis.
It aims to determine if there is enough evidence to reject the null hypothesis in favor of the alternative hypothesis.
Common methods of hypothesis testing include t-tests, chi-square tests, and ANOVA.
The p-value is used to dete...
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