DL Advanced and Specialized Skills 4

Question 1

A web developer needs to make a website accessible to users with screen readers. Which HTML attribute provides descriptive text for images?

Accepted Answer

alt

Answer

title

Answer

src

Answer

class

Question 2

Which data format is most commonly used for exchanging structured data between a web API and client applications?

Accepted Answer

JSON

Answer

CSV

Answer

PDF

Answer

DOCX

Question 3

A system administrator needs to automate server configuration across hundreds of machines consistently. Which category of tool is designed for this?

Accepted Answer

Configuration management tools like Ansible or Puppet

Answer

Word processors

Answer

Browser-based spreadsheet editors

Answer

FTP clients

Question 4

In cloud computing, what does 'elasticity' refer to?

Accepted Answer

The ability to automatically scale resources up or down based on demand

Answer

The physical flexibility of server hardware

Answer

Storing data across geographically distant locations

Answer

The speed of the network connection between data centers

Question 5

A developer writes a SQL query with a subquery in the WHERE clause that references the outer query's table. What is this called?

Accepted Answer

A correlated subquery

Answer

A cross join

Answer

A materialized view

Answer

A stored procedure

Question 6

Which encryption standard is currently recommended for securing sensitive data at rest in enterprise environments?

Accepted Answer

AES-256 (Advanced Encryption Standard)

Answer

DES (Data Encryption Standard)

Answer

MD5 hashing

Answer

Base64 encoding

Question 7

A data engineer needs to move large volumes of data from operational databases into a data warehouse for analytics. What process describes this workflow?

Accepted Answer

ETL (Extract, Transform, Load)

Answer

CRUD operations

Answer

ACID transactions

Answer

Sharding