_CodeAndConquer
@_CodeAndConquerEngineer and author at Interviews Vector, writing about system design, distributed systems, and senior-level technical interview preparation.
Interviews Vector publishes interview preparation and engineering reference material written at the senior, staff, and principal bar — system design case studies with real capacity math and trade-offs, distributed systems material for working engineers, and company-specific interview loops.
Articles here favour scenario-driven explanation and explicit trade-offs over memorisation: what to do, why, and when the alternative is the better call.
Articles by _CodeAndConquer
Fix CUDA and cuDNN Library Load Errors in TensorFlow: A Diagnostic Guide
Every TensorFlow CUDA library error — libcublas, libcudart, libnvinfer, cuDNN internal errors, and conda not detecting CUDA — traced to one of four root causes, with the diagnostic order to work through them.
Common Pandas Errors and Gotchas: A Diagnostic Guide
The pandas errors that cost the most time — SettingWithCopyWarning, Int64Index attribute errors, silent assignment failures, and merge row explosions — each traced to the small number of concepts that actually cause them.
2024: Developer Honesty in Tech Crisis
Discover the shocking truth about developer honesty in tech. Learn how 75% of devs lie about code and take action to fix the crisis threatening our digital world
Google AI Edge Gallery: Running AI Models Directly on Your Phone
Google AI Edge Gallery lets you run powerful AI models locally on Android devices — no cloud required. Here's what it does, why it matters, and how to start using it.
Top 30 SQL Interview Questions for Professionals with 7+ Years of Experience
Thirty advanced SQL interview questions for engineers with 7+ years of experience, covering indexing, query optimization, window functions, transactions, isolation levels, and deadlock handling — each with a worked answer.
Master These Most Frequently Asked Java Interview Questions Before Your Next Interview in 2025
Twenty-nine of the most frequently asked Java interview questions for experienced developers — JVM internals, OOP principles, string immutability, the collections framework, exception handling, and multithreading — each with a worked explanation.
Top 10 Interview Questions and Answers for Senior Software Engineers at Infosys
Ten questions Infosys asks Senior Software Engineers — scalable URL shortener design, microservices trade-offs, CAP theorem, API versioning, event-driven architecture, and code quality at team scale — each with a model answer.
React 19 Update - Unlocking Performance and Developer Experience
Let's delve into the exciting new additions in React 19 and explore how they can empower you to create exceptional web applications.
Debouncing in React 19 - Optimizing User Input and API Calls
Debouncing is a powerful technique that delays the execution of a function until a certain amount of time has passed since the last user interaction.
Building a Two-Way Binding Hook for React
we can create a custom hook to build a simple two-way binding hook for React similar to Angular ngModel.
Streamlining Your Angular Development with Angular 17's Automatic Migration
Angular 17 automatic migration schematic is a testament to Angular's commitment to ease of use and developer-friendly practices
Embracing the Future of Coding with Angular 17's New Control Flow Syntax
The new control flow syntax in Angular 17 brings a modern and streamlined approach to handling common coding structures.
Exploring the Exciting New Features of Angular 17 - A Comprehensive Guide
Angular 17, packed with exciting features and enhancements staying updated with the latest technologies is crucial
Deferred Loading with Angular 17 - Enhancing Web Application Performance
Angular 17 performance optimization reaches new heights with the introduction of the defer feature.
Fix Failure of Keras Model.fit with Mirrored Strategy
To resolve failures encountered when using the mirrored strategy in Keras with the model.fit() function. It covers potential causes such as TensorFlow version, GPU availability, batch size compatibility, and model setup.
InvalidArgumentError Unsupported 'dtype' Value bfloat16
InvalidArgumentError: Value for attr 'dtype' of bfloat16 is not in the list of allowed values means the op you called does not accept bfloat16. Here is why, and which dtype to use instead.
Error - Check Failed in tensorflow/core/util/gpu_launch_config.h:129
This error occurs when there is a check failure related to the number of work elements.
TensorFlow error message - "InvalidArgumentError Graph execution error"
To resolve this issue, you need to ensure that all tensors in your training dataset have the same shape. You can achieve this by resizing or cropping the images to a consistent size before batching them.
Fix error "CUDA_ERROR_LAUNCH_FAILED - Unspecified launch failure" and "CUDNN_STATUS_INTERNAL_ERROR" in TensorFlow
This error could be caused by various factors, including incorrect CUDA or GPU driver installation, insufficient GPU memory, or an issue with the code or model you are running.
Fix Error - Could not load dynamic library 'libnvinfer_plugin.so.6'
The error "Could not load dynamic library 'libnvinfer_plugin.so.6'" indicates that a program or application is unable to locate or load the shared library file 'libnvinfer_plugin.so.6', which is typically associated with NVIDIA TensorRT for deep learning inference optimization.
Untraced Functions Warning during Model Saving
When saving a TensorFlow model, the warning message "Found untraced functions such as lstm_cell_2_layer_call_fn, lstm_cell_2_layer_call_and_return_conditional_losses, lstm_cell_2_layer_call_fn, lstm_cell_2_layer_call_and_return_conditional_losses, lstm_cell_2_layer_call_and_return_conditional_losses while saving" may appear.
Troubleshooting IDE Auto-Completion Failure for tensorflow.keras
Fix IDE Auto-Completion Failure for tensorflow.keras.
Relationship between TF.Slim, TF High-Level API, and Keras
TF.Slim, TF High-Level API (tf.keras), and Keras are frameworks built on TensorFlow. TF.Slim provides tools for computer vision tasks, tf.keras is a user-friendly API within TensorFlow, and Keras is a separate framework compatible with TensorFlow.
Fix error - ImportError- Cannot Import 'abs'
This error typically occurs due to a conflict with a user-defined variable or function named 'abs' or a circular import issue.
Building a Convolutional Neural Network for Image Classification with Swift API for TensorFlow
The Swift API for TensorFlow provides an intuitive and efficient way to leverage TensorFlow's powerful deep learning capabilities while taking advantage of Swift's safety and expressiveness.
Resolve 'ImportError - libcublas.so.9.0 - cannot open shared object file No such file or directory'
This error occurs when a required shared library file named "libcublas.so.9.0" is either missing or inaccessible.
Fixing the "Could not load dynamic library 'libcudart.so.11.0'" Error
The error message you provided suggests that a dynamic library called 'libcudart.so.11.0' could not be loaded. This library is typically associated with the CUDA runtime, which is used for GPU acceleration in certain applications or frameworks.
How to Change default types globally in tensorflow?
Set TensorFlow's global float type with tf.keras.backend.set_floatx, or use mixed_precision.set_global_policy for float16/bfloat16 training. ConfigProto does not control dtypes.
Fixing TensorFlow's Failure to Detect CUDA Installed via Conda - Detailed Solution
Troubleshoot and resolve TensorFlow's failure to detect CUDA installed through Conda, enabling GPU utilization.
What are the GPUOptions for Go binding in TensorFlow?
Optimize GPU utilization with TensorFlow's Go binding using GPUOptions. Control memory allocation, growth, and device selection for efficient computations.
How to handle class weight for multiple outputs in keras?
Weighting Classes in Multiple Output Models with tf.keras - Custom Loss and Sample Weights Solution
How to assign value to a EagerTensor slice?
EagerTensors created with tf.constant are immutable, so slice assignment raises AttributeError. Use tf.Variable for in-place updates, or tf.tensor_scatter_nd_update to build a modified copy.
Tensorflow Lite conversion output vs. Tensorflow output - Differences and Benefits Compared
The advantages of TensorFlow Lite's optimized model size, execution efficiency, and supported operations for mobile and embedded deployments.
How to clear GPU memory in tensorflow 2?
Clear GPU memory in TensorFlow 2 by enabling memory growth or setting memory limits. Optimize performance with these simple techniques.
How to modify complex store data in sveltejs ?
A practical example to understand how to update specific properties of complex store data, ensuring optimal performance and reactivity in your Svelte.js applications.
Efficient Fragment Creation in Svelte.js - Optimize the rendering performance of components
Understanding how to optimize the rendering performance of components in Svelte.js by using efficient fragment creation.
Understanding the Error Handling API in Svelte Components
Svelte handles errors with the {:catch} block on await, <svelte:boundary> in Svelte 5, and +error.svelte in SvelteKit. There is no <svelte:error> element — here is what to use instead.
How to set slots after component instance is created in Svelte.js?
Explore the powerful capabilities of Svelte.js in dynamically setting slot content within components even after their instance creation.
Creating a Custom Filter in ag-Grid
Creating a custom filter for ag-Grid. Custom filters allow you to implement advanced filtering logic tailored to your specific requirements, enabling you to provide a seamless data filtering experience for your users.
How to fix error unable to retrieve jdbc result set for SELECT * FROM TABLE?
Fix error unable to retrieve jdbc result set for
How to convert a date to Unix epoch time in Python?
To convert a date to Unix epoch time in Python using the time module
How to fix TypeError - Can only concatenate str (not "NoneType") to str?
Learn how to resolve the Python TypeError that occurs when concatenating a string with a NoneType object. Explore practical solutions with examples.
Understanding Inheritance in Python - How does inheritance work in Python?
Explanation of what inheritance is and why it's important in object-oriented programming
Object-Oriented Programming in Python Understanding Classes and Objects.
Python Classes and Objects Building Blocks of Object-Oriented Programming
Understanding Polymorphism in Python - How to Write Reusable Code
Polymorphism in Python refers to the ability of a derived class to be used in the same way as its base class. This allows for more flexibility and code reuse
OOPS Concept In Python interview questions
OOPS, or Object-Oriented Programming Systems, is a programming paradigm that is based on the concept of objects, which have properties and methods.
A guide to the data science life cycle
An overview of the data science life cycle
Seaborn for Data Visualization in Python
Seaborn is a Python data visualization library based on matplotlib
Correlation is a part of multivariate analysis? Explained
Correlation is a measure of the relationship between two variables
What happens in anomaly detection?
Anomaly detection is the process of identifying unusual patterns or events in data that do not conform to an expected behavior
Forms of Discriminant Analysis Explained in Details
Discriminant Analysis is a powerful tool for understanding and predicting the relationships between variables
How to fix AttributeError- 'Int64Index' object has no attribute 'month'?
To fix this error, you will need to make sure that you are only trying to access the month attribute of objects that have this attribute
How to Append Multiple Excel Files together in python?
Append multiple Excel files together using Python
How to fix Error 524 while running jupyter lab in google cloud platform?
Here are a few things you can try to fix error 524
Extend Apache Airflow with Custom Operators and Tasks: A Step-by-Step Guide with Examples
Learn how to extend Apache Airflow with custom Operators and Tasks. Follow our step-by-step guide with examples to enhance your workflow automation.
How to set up Apache Airflow on your local machine?
To set up Airflow, you'll need to have Python and a few other dependencies installed on your machine.
A beginner's guide to Apache Airflow, including an overview of the tool's main features and a tutorial on how to set it up and run your first workflow.
Apache Airflow is an open-source platform to programmatically author, schedule, and monitor workflows.
Pandas drop rows vs filter with examples
Explained Pandas drop rows vs filter with examples
How to implement custom loss function in scikit-learn?
To implement a custom loss function in scikit-learn, we'll need to use the make_scorer function
How to use XGBoost in Python?
Here is an example of how to use XGBoost in Python
What is the difference between 'transform' and 'fit_transform' in sklearn?
Understanding the difference between transform and fit_transform is important for effectively using sklearn to prepare your data for modeling
How to load a model from an HDF5 file in Keras?
In this post, we will look at how to load a model from an HDF5 file in Keras
Difference between StratifiedKFold and StratifiedShuffleSplit in sklearn
StratifiedKFold partitions data into k non-overlapping folds so every sample is tested exactly once; StratifiedShuffleSplit draws independent random splits that may overlap. Both preserve class balance — this guide shows when to use each.
How to plot multiple pandas columns
Here is example of how to plot multiple columns from a Pandas DataFrame
How can repetitive rows of data be collected in a single row in pandas?
Collecting repetitive rows of data into a single row can be useful for data cleaning and data analysis purposes.
Getting started with PyTorch
Here is a basic tutorial on getting started with PyTorch
Fix Firebase code 400 "message" - "CONFIGURATION_NOT_FOUND" error
How to fix Firebase code 400 message - CONFIGURATION_NOT_FOUND error
How to install wget in macOS?
macOS does not ship with wget. Install it with Homebrew using brew install wget, or build from source with MacPorts as an alternative.
How to fix Python AttributeError: module 'pexpect' has no attribute 'TIMEOUT'
AttributeError: module 'pexpect' has no attribute 'TIMEOUT' almost always means a stale module is still loaded in memory or a local file is shadowing the real package. Here is how to tell which, and fix it.
How to fix SettingWithCopyWarning in Pandas?
SettingWithCopyWarning means pandas cannot tell whether you are modifying a view or a copy, so your assignment may silently do nothing. Here is the view-vs-copy model behind it and the .loc fix.
Fix ‘Max Retries Exceeded with URL’ in Python Requests – Easy Solutions
Learn how to fix the ‘Max Retries Exceeded with URL’ error in Python requests. Solve connection issues, increase retries, and troubleshoot effectively.
How to use ternary conditional operator in Python?
Python's ternary is a conditional expression written value_if_true if condition else value_if_false — not the C-style condition ? a : b. Here is the syntax, with examples and its limits.
Testing Pipes in Angular With Jasmin And Karma
Testing Pipes in Angular With Jasmin And Karma: A Walkthrough
How to fix Refused to set unsafe header Origin while making XMLHttpRequest
Origin is a forbidden header name — browsers set it themselves and silently refuse any attempt to override it via setRequestHeader. Here is why the restriction exists and what to do instead.
Learn Angular 14 Unit testing code coverage using Karma
Generate Angular unit test code coverage with Karma using ng test --code-coverage, read the HTML report, enforce minimum thresholds in CI, and exclude files that shouldn't count.
Group Anagrams using Javascript
Given an array of strings strs, group the anagrams together.