Popular languages and their uses in Intro to Computing - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ identification

intermediate

Identify the language best suited for web page structure

Which language is primarily used to create the structure of web pages?

A HTML

B Python

C Java

D CSS

💡 Hint

Think about the language that defines headings, paragraphs, and links on a website.

HTML (HyperText Markup Language) is the standard language used to create the structure of web pages. It defines elements like headings, paragraphs, and links.

CSS is used for styling, Python and Java are programming languages used for other purposes.

🧠 Conceptual

intermediate

Match language to its common use

Which language is most commonly used for data analysis and scientific computing?

A HTML

B JavaScript

C SQL

D Python

💡 Hint

This language is popular for its simplicity and has many libraries for data work.

Python is widely used for data analysis and scientific computing due to its readable syntax and powerful libraries like NumPy and pandas.

JavaScript is mainly for web interactivity, SQL for databases, and HTML for web structure.

❓ trace

advanced

Trace the output of a JavaScript snippet

What will be the output of the following JavaScript code?

const languages = ['Python', 'JavaScript', 'Java'];
console.log(languages[1]);

Intro to Computing

const languages = ['Python', 'JavaScript', 'Java'];
console.log(languages[1]);

A JavaScript

B Java

C Python

D undefined

💡 Hint

Remember that array indexes start at 0.

Arrays in JavaScript start at index 0. So languages[1] refers to the second item, which is 'JavaScript'.

❓ Comparison

advanced

Compare SQL and NoSQL databases

Which statement correctly compares SQL and NoSQL databases?

A SQL databases do not support queries; NoSQL databases do.

B SQL databases are only used for small data; NoSQL is only for big data.

C SQL databases store data in tables; NoSQL databases store data in flexible formats like documents or key-value pairs.

D SQL databases are faster than NoSQL in all cases.

💡 Hint

Think about how data is organized in each type.

SQL databases use structured tables with rows and columns. NoSQL databases use flexible formats like documents, key-value pairs, or graphs.

Statements A, B, and C are incorrect generalizations.

🚀 Application

expert

Choose the best language for mobile app development

You want to build a mobile app that works on both Android and iOS with a single codebase. Which language or technology is best suited for this?

A Swift

B React Native

C Java

D Kotlin

💡 Hint

Look for a technology that allows writing code once and running on multiple platforms.

React Native allows developers to write one codebase in JavaScript that runs on both Android and iOS.

Swift and Kotlin are native languages for iOS and Android respectively, and Java is mainly for Android.