Which HTTP status code indicates that the server successfully processed the request, but is not returning any content?
- 200 OK
- 204 No Content
- 404 Not Found
- 500 Internal Server Error
The '204 No Content' status code indicates that the server successfully processed the request but is not returning any additional content in the response body. It's often used for operations that have no response data.
You're developing a web application where performance is a critical concern. Which technique would be most suitable for reducing the load times of your web pages?
- Content Delivery Networks (CDNs)
- Object-Oriented Programming
- Static Code Analysis
- Waterfall Model
Content Delivery Networks (CDNs) are crucial for optimizing web page load times. CDNs distribute content to servers closer to the user, reducing latency and speeding up page loading. They cache assets and reduce the load on the origin server, improving performance.
Which type of visualization would be most appropriate for representing hierarchical data, like the structure of an organization?
- Bar Chart
- Pie Chart
- Scatter Plot
- Tree Diagram
Representing hierarchical data, such as the structure of an organization, is best done using a 'Tree Diagram' visualization. It visually displays the parent-child relationships between different levels of a hierarchy, making it clear and organized.
Which data structure would be most efficient for implementing a cache with least recently used (LRU) eviction policy?
- Binary Search Tree
- Doubly Linked List
- Hash Table
- Priority Queue
A 'Doubly Linked List' is a common choice for implementing an LRU cache. It allows efficient insertion and removal of elements from both ends, making it suitable for the LRU policy.
Which protocol operates at the Data Link layer and prevents loops in Ethernet networks by creating a loop-free logical topology?
- ARP
- ICMP
- OSPF
- STP
The Spanning Tree Protocol (STP) operates at the Data Link layer and prevents loops in Ethernet networks by creating a loop-free logical topology. It's crucial for network stability and redundancy in Ethernet networks.
_______ is a virtualization technology focused on running multiple instances or copies of an application on a single set of hardware resources.
- Containerization
- Firewall
- Hyperconvergence
- Virtual Private Network (VPN)
'Containerization' is a virtualization technique that allows running multiple instances or copies of applications on the same hardware, isolated from each other. Containers share the same OS kernel and use fewer resources.
What SQL clause is used to filter the results of a query based on a specified condition?
- GROUP BY
- ORDER BY
- SELECT
- WHERE
The 'WHERE' clause in SQL is used to filter the results of a query based on a specified condition. It allows you to retrieve specific data that meets certain criteria.
You have a list of tasks to complete, some of which depend on others being completed first. You want to determine a sequence to complete the tasks such that all dependencies are honored. What algorithmic approach would be most suitable?
- Greedy Algorithm
- Merge Sort
- Quick Sort
- Topological Sorting
To determine a task sequence while honoring dependencies, 'Topological Sorting' is the most appropriate approach. It is commonly used in project scheduling and task management to create a linear order of tasks in a directed acyclic graph (DAG) while ensuring all dependencies are met.
What type of attack involves overwhelming a target with a flood of internet traffic, rendering it inaccessible?
- Cross-Site Scripting
- DDoS attack
- Phishing attack
- SQL injection
A 'DDoS attack' (Distributed Denial of Service) is when a target is overwhelmed by a massive flood of internet traffic from multiple sources, causing it to become inaccessible. It's a common attack to disrupt online services.
In data visualization, the process of displaying three-dimensional data on a two-dimensional plane is known as _______.
- 3D Mapping
- Data Projection
- Dimension Reduction
- Flat Visualization
The process described here is 'Data Projection.' It involves transforming three-dimensional data onto a two-dimensional plane while preserving important relationships and patterns, which is crucial in data visualization and analysis.