JavaScript execution flow - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the JavaScript execution flow?

It is the order in which JavaScript code runs, from top to bottom, line by line, unless directed otherwise by functions, loops, or conditions.

beginner

What happens when a function is called in JavaScript execution flow?

The flow jumps to the function's code, runs it, then returns back to the next line after the call.

beginner

How do loops affect JavaScript execution flow?

Loops repeat a block of code multiple times, causing the flow to cycle through the loop until a condition stops it.

intermediate

What is the role of the call stack in JavaScript execution flow?

The call stack keeps track of function calls, managing where the flow should return after each function finishes.

intermediate

How does asynchronous code affect JavaScript execution flow?

Asynchronous code runs separately and uses callbacks or promises to continue execution later, without blocking the main flow.

What is the default order of JavaScript execution?

A Top to bottom, line by line

B Bottom to top

C Random order

D Only functions run

JavaScript runs code from top to bottom, line by line, unless directed otherwise.

When a function is called, what happens to the execution flow?

A It skips the function

B It jumps to the function, runs it, then returns

C It runs the function later

D It stops completely

The flow jumps to the function code, executes it, then returns to continue.

What does the call stack do in JavaScript execution?

A Runs asynchronous code

B Stores variables

C Manages function calls and returns

D Handles errors only

The call stack tracks function calls and where to return after each finishes.

How do loops affect the execution flow?

A They repeat code blocks multiple times

B They skip code

C They run code once

D They stop the flow

Loops repeat a block of code until a condition is met.

What is true about asynchronous JavaScript execution?

A It does not exist

B It runs code immediately in order

C It blocks the main flow

D It runs separately and continues later

Asynchronous code runs separately and uses callbacks or promises to continue later.

Explain how JavaScript executes code from start to finish, including how functions and loops affect the flow.

Think about how the program moves through lines and jumps into functions or loops.

Describe the role of the call stack and how asynchronous code changes the usual execution flow.

Consider how JavaScript keeps track of where it is and how it handles tasks that take time.