Q601. How memory is managed in Python?
Python memory is managed by Python private heap space. All Python objects and data structures are located in a private heap. The programmer does not have an access to thi...
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Q602. What is the difference between div element and span element?
The div element is a block-level element that is used to group and organize other HTML elements while span element is an inline-element that is used to apply style or att...
Q603. What is tuple datatype in TypeScript?
In TypeScript, a tuple is a type that allows you to define an array with a fixed number of elements of different types. Tuples are similar to arrays, but the types of ele...
Q604. What is a first class function?
In JavaScript, **first-class functions(first-class citizens)** mean that functions are treated like any other variable. That means: 1. You can assign a function to a vari...
Q605. What is the difference between HTML and React event handling?
Below are some of the main differences between HTML and React event handling, 1. In HTML, the event name usually represents in _lowercase_ as a convention: ```html ``` Wh...
Q606. How would you design a test strategy for a microservices system?
Testing a distributed system needs a layered strategy, because full end-to-end coverage does not scale. - Unit tests per service for domain logic, run on every commit. - ...
Q607. How would you scale a relational database as traffic grows?
Scaling relational databases follows a progression, because a single node eventually hits CPU, memory or I/O limits. 1. Optimise first: fix queries, add indexes, tune the...
Q608. How does a CDN improve performance and how would you design for it?
A content delivery network caches content on edge servers close to users, reducing latency and offloading the origin. How it works: DNS or anycast routes the user to a ne...
Q609. How would you design a thread pool?
A thread pool keeps a set of worker threads alive so tasks avoid per-request thread-creation cost. Core pieces: - A task queue, typically bounded, holding runnable work. ...
Q610. How would you refactor a god class into a maintainable design?
A god class is large, does many unrelated things, has many dependencies and is touched by most changes. Treat the refactor as a series of safe, behaviour-preserving steps...