Suppose you're designing a database for an e-commerce platform with millions of products. How would you approach schema design and indexing to optimize search queries?
- Create composite indexes
- Implement full-text search indexes
- Use denormalized schemas
- Utilize NoSQL databases
Implementing full-text search indexes is a key strategy for optimizing search queries in a database with millions of products. This allows for efficient and quick searching through large amounts of textual data.
What is a Pod in the context of Kubernetes?
- A Pod is a group of containers that share networking and storage resources.
- A Pod is a node in a Kubernetes cluster responsible for scheduling containers.
- A Pod is a single container that encapsulates an application and its dependencies.
- A Pod is a virtual machine instance in a Kubernetes cluster.
In the context of Kubernetes, a Pod is the smallest deployable unit. It represents a group of one or more containers that share networking and storage resources, such as IP address and filesystem. Pods are the basic building blocks of Kubernetes applications and serve as the logical host for containers. They enable co-located, tightly-coupled containers to work together as a single application.
Cache _______ is the process of updating cached data based on changes in the source data.
- Invalidation
- Refresh
- Synchronization
- Update
Cache Invalidation is the process of updating cached data based on changes in the source data. It ensures that the cached data remains consistent with the latest changes.
Which CSS selector targets elements based on their class?
- #class
- .class
- class
- element.class
The correct selector to target elements based on their class is .class. It is a fundamental selector in CSS for styling specific elements with a given class.
The HTTP _______ method is used for updating an existing resource in a RESTful API.
- PATCH
- POST
- PUT
- UPDATE
The HTTP PATCH method is used for updating an existing resource in a RESTful API. It is specifically designed for partial updates, making it suitable for modifying specific fields without affecting the entire resource.
How does hoisting work in JavaScript?
- Assignments are moved to the top of the scope during compilation
- Declarations are moved to the top of the scope during compilation
- Functions are moved to the top of the scope during compilation
- Variables are moved to the top of the scope during runtime
Hoisting in JavaScript refers to the behavior where function declarations are moved to the top of the scope during compilation, allowing them to be used before they are declared.
Among the options, which language is renowned for its simplicity, readability, and extensive standard library, commonly used in web development with frameworks like Flask and Django?
- Java
- Node.js
- Python
- Ruby
Python is renowned for its simplicity, readability, and extensive standard library. It is commonly used in web development with frameworks like Flask and Django, making it a popular choice for building web applications.
In data migration, ETL stands for Extract, Transform, and _______.
- Link
- Load
- Locate
- Log
ETL stands for Extract, Transform, and Load. This process is fundamental in data migration, where data is extracted from a source, transformed as necessary, and then loaded into a target system.
What is dynamic programming in algorithm design?
- A method for designing algorithms that only work on dynamic data structures
- A process of designing algorithms that are continuously changing
- A technique to solve problems by breaking them down into smaller overlapping subproblems
- An approach to designing algorithms using dynamic input data
Dynamic programming is a technique used to solve problems by breaking them down into smaller overlapping subproblems, solving each subproblem only once, and storing the solutions for future use. It's particularly useful for optimization problems.
What are the key components of a comprehensive logging strategy in a microservices architecture?
- Centralized log storage, structured log formats, correlation IDs, and log aggregation
- Client-side logging, lightweight log formats, and real-time alerts
- Only server-side logging, comprehensive alerting, and distributed log storage
- Unstructured logs, decentralized storage, and real-time log analysis
A comprehensive logging strategy in microservices includes centralizing logs, using structured formats for easy analysis, implementing correlation IDs for request tracking, and aggregating logs to simplify troubleshooting and analysis.
In a Node.js application, JavaScript is primarily used for _______ scripting.
- Client-side
- Database
- Front-end
- Server-side
In a Node.js application, JavaScript is primarily used for server-side scripting. This is a distinctive feature of Node.js, enabling server-side development using JavaScript.
_______ profiling helps identify areas of code that consume excessive resources or cause bottlenecks.
- Code
- Memory
- Performance
- Time
Performance profiling involves analyzing a program's runtime behavior to identify bottlenecks and resource-heavy sections. It helps optimize code for better efficiency and speed.