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T test is a statistical test used to determine if there is a significant difference between the means of two groups.
T test is used to compare the means of two groups to see if they are significantly different.
It is commonly used in hypothesis testing to determine if there is a significant difference between two sample means.
There are different types of t tests such as independent samples t test, paired samples t test, ...
Central Limit Theorem states that the sampling distribution of the sample mean approaches a normal distribution as the sample size increases.
Central Limit Theorem is a fundamental concept in statistics that states that the distribution of sample means approximates a normal distribution, regardless of the shape of the original population distribution.
It is important in inferential statistics as it allows us to make infe...
AUC ROC curve is a graphical representation of the performance of a classification model.
AUC stands for Area Under the Curve and ROC stands for Receiver Operating Characteristic.
It is used to evaluate the performance of binary classification models.
The curve plots the true positive rate against the false positive rate at various threshold settings.
A perfect model would have an AUC ROC score of 1, while a random model w
Gini index is a measure of inequality in a set of values, often used in decision tree algorithms.
Gini index ranges from 0 (perfect equality) to 1 (maximum inequality).
It is commonly used in decision trees to determine the impurity of a node.
A lower Gini index indicates a more homogeneous set of values.
Formula: Gini Index = 1 - (sum of squared probabilities of each class in the node).
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I applied via Approached by Company and was interviewed in Sep 2024. There were 5 interview rounds.
I applied via Campus Placement and was interviewed in Aug 2024. There were 2 interview rounds.
1 coding question based on DP for 25 minutes and 30 MCQs on Java , OOPS and code snippet questions also some basic questions based on trees like number of leaf nodes in a complete binary tree with n nodes.
Code to find palindrome of a string
Iterate through the string from both ends and compare characters
Use two pointers, one starting from the beginning and one from the end
If characters at both pointers match, continue checking until they meet in the middle
If all characters match, the string is a palindrome
Dynamic memory allocation in Java refers to the process of allocating memory for objects at runtime.
Dynamic memory allocation allows for objects to be created and destroyed during program execution.
The 'new' keyword is used to dynamically allocate memory for objects in Java.
Dynamic memory allocation helps in managing memory efficiently by allocating memory only when needed.
Example: int[] arr = new int[5]; dynamically a
I would choose a relational database like MySQL and implement a custom authentication system using session management.
Choose a relational database like MySQL for storing user data, product information, and orders.
Implement a custom authentication system using session management to securely authenticate users without JWT or third-party services.
Use encryption techniques to store and validate user passwords securely.
Util...
posted on 21 Aug 2024
HTML and CSS are markup languages used for creating and styling web pages.
HTML stands for HyperText Markup Language and is used for structuring content on web pages.
CSS stands for Cascading Style Sheets and is used for styling the appearance of web pages.
HTML uses tags to define elements like headings, paragraphs, images, and links.
CSS allows for customization of colors, fonts, layout, and other visual aspects of a web...
posted on 7 May 2024
Design a system to send notifications to train passengers when the train arrives at the next station.
Use GPS tracking to determine train location in real-time
Implement a notification system that sends alerts to passengers' devices
Integrate with train schedule data to know when the train is approaching the next station
posted on 25 Apr 2024
I applied via Naukri.com and was interviewed in Apr 2024. There was 1 interview round.
Flatten a tree in right preorder
Traverse the tree in right-preorder (root, right, left)
Use a stack to keep track of nodes
Pop nodes from stack and add to result array
Policy manager is a software tool used to centrally manage and enforce policies across an organization's systems and applications.
Policy manager helps define, monitor, and enforce policies related to security, compliance, access control, and other governance aspects.
It allows administrators to set rules and regulations that govern how data and resources are accessed and used within an organization.
Policy manager can au...
We had Aptitude and 2 Coding questions
posted on 2 May 2024
I applied via Naukri.com and was interviewed before May 2023. There were 4 interview rounds.
They asked general aptitude questions ones you can easily practice from indiabix
Be prepared with medium level DSA questions. They touched upon topics like trees, DP, hashing etc.
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