execFile for running executables in Node.js - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the execFile function from the child_process module.

Node.js

const { [1] } = require('child_process');

Drag options to blanks, or click blank then click option'

Afork

Bexec

Cspawn

DexecFile

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'exec' instead of 'execFile'.

Trying to import the whole module without destructuring.

The execFile function is imported from the child_process module to run executables directly.

2fill in blank

medium

Complete the code to run the executable 'ls' with execFile.

Node.js

execFile('[1]', (error, stdout, stderr) => {
  if (error) {
    console.error(error);
    return;
  }
  console.log(stdout);
});

Drag options to blanks, or click blank then click option'

Anpm

Bnode

Cls

Dgit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'node' or 'npm' which are not simple executables for listing files.

Using 'git' which is for version control.

The executable to list directory contents on Unix systems is ls.

3fill in blank

hard

Fix the error in the callback parameter to correctly handle the error.

Node.js

execFile('ls', ([1], stdout, stderr) => {
  if (error) {
    console.error(error);
    return;
  }
  console.log(stdout);
});

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Aerr

Berror

Ce

Dexception

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than the variable used inside the callback.

Using 'err' or 'e' but checking 'error' inside the function.

The callback parameter name must match the variable used inside the function. Here, error is used, so the parameter must be named error.

4fill in blank

hard

Fill both blanks to run 'node' with arguments to execute a script file 'app.js'.

Node.js

execFile('[1]', ['[2]'], (error, stdout, stderr) => {
  if (error) {
    console.error(error);
    return;
  }
  console.log(stdout);
});

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Anode

Bapp.js

Cindex.js

Dscript.js

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong executable name like 'npm'.

Using wrong script file names.

The node executable runs JavaScript files, and here it runs the script app.js.

5fill in blank

hard

Fill all three blanks to run 'git' with arguments to show the current branch name.

Node.js

execFile('[1]', ['[2]', '[3]'], (error, stdout, stderr) => {
  if (error) {
    console.error(error);
    return;
  }
  console.log(`Current branch: ${stdout.trim()}`);
});

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Agit

Bbranch

C--show-current

Dstatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'status' instead of '--show-current'.

Using wrong executable or arguments.

The command git branch --show-current shows the current branch name.