ACIT-2520 Midterm Review

Create an illustration of a student studying Javascript programming, surrounded by code snippets and books, in a modern classroom setting.

ACIT-2520 Midterm Review Quiz

Test your knowledge and prepare for the ACIT-2520 midterm exam with our engaging quiz! This quiz covers essential topics in programming and Javascript, helping you to solidify your understanding of key concepts.

Key Features:

Multiple choice questions
Questions on asynchronous programming, promises, and more
Great for self-assessment and revision

15 Questions4 MinutesCreated by CodingFox257

Which of the following is required in order to write and execute a program?

A) A programming language

B) A run-time environment

C) A Windows PC

D) Both A and B

Compilers perform real-time translation line-by-line of our program, whereas an interpreter goes through our entire program from top to bottom before allowing the CPU to execute the resulting code.

True

False

Which function below can be used to read a file asynchronously in Node.js

Fs.readDir

Fs.readFileSync

Fs.writeFile

Fs.readFile

When I have an asynchronous function like fs.readFile which depends on the result of an fs.writeFile operation first being completed, I should nest the fs.readFile operation inside the callback of fs.writeFile.

True

False

Every function in javascript that receives a callback function as a parameter is asynchronous

True

False

The "error-first" callback convention in Node.js is where the first parameter in our callback function is our error, and we use an if statement to check whether or not that error exists before proceeding forward. It can be seen functions like readFile, writeFile, appendFile, etc.

True

False

The higher order function is filter and the callback function is func2

The callback function is filter and the higher order function is func2

The higher order function is greaterThanTwo and the callback function is func2

The higher order function is filter and there is no callback function

Promises are an alternative way in Javascript to manage asynchronous code. They solve two major issues with callback functions. What are the two most prominent issues with callback functions? (Select all that apply)

Readability problem (Deeply Nested code in callbacks)

Cannot access global scope

Callback functions don't work with recursion

No Centralized Error Handling

If a promise object resolves, it will call our .then() handler. If the promise rejects, it will call our .catch() handler.

True

False

We only need one single .catch for our promise chain, and if any .then's throw an error, our .catch handler will receive it.

True

False

Whatever value we return from a .then is automatically wrapped in a promise so we can change additional .thens. The value will make its way into the subsequent .then's parameter. For example, in the code below, val would have "hello" in it. someFunc().then(() => "hello").then(val => console.log(val)).catch(err => console.log(err))

True

False

ACIT-2520 Midterm Review

ACIT-2520 Midterm Review Quiz

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