DL Advanced and Specialized Skills 3

Question 1

Which machine learning approach is used when labeled training data is not available and the model must find patterns on its own?

Accepted Answer

Unsupervised learning

Answer

Unsupervised learning finds hidden patterns or intrinsic structures in unlabeled input data without predefined correct answers.

Question 2

A developer uses `git rebase` instead of `git merge`. What is the key practical difference?

Accepted Answer

Rebase creates a linear commit history by replaying commits

Answer

Git rebase replays commits onto a new base, creating a cleaner linear history compared to merge's divergent branch records.

Question 3

What does 'containerization' mean in modern software deployment?

Accepted Answer

Packaging an application and its dependencies into an isolated runtime unit

Answer

Containerization packages application code with all its dependencies into a portable, isolated unit that runs consistently across environments.

Question 4

A user wants to query a NoSQL document database. Which query language or method is typically used in MongoDB?

Accepted Answer

JSON-based query documents passed as method arguments

Answer

MongoDB uses JSON-like query documents passed to methods such as `find()` rather than traditional SQL syntax.

Question 5

Which networking protocol is responsible for translating human-readable domain names into IP addresses?

Accepted Answer

DNS

Answer

DNS (Domain Name System) resolves human-readable domain names like example.com into machine-readable IP addresses.

(DL) Digital Literacy Certification Practice Test