Interface Segregation Principle in LLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define a small interface for printing only.

LLD

interface Printer {
    void [1]();
}

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

AcopyDocument

BscanDocument

CfaxDocument

DprintDocument

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing methods related to scanning or faxing instead of printing.

The method printDocument is the correct one for a Printer interface focused only on printing.

2fill in blank

medium

Complete the code to split a large interface into two smaller ones.

LLD

interface [1] {
    void printDocument();
}
interface [2] {
    void scanDocument();
}

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

APrinter

BScanner

CFaxMachine

DCopier

Attempts:

3 left

💡 Hint

Common Mistakes

Combining unrelated methods in one interface.

Using incorrect interface names.

The Printer interface should have the printDocument method, and the Scanner interface should have the scanDocument method, following the Interface Segregation Principle.

3fill in blank

hard

Fix the error in the interface segregation by choosing the correct interface name for faxing.

LLD

interface [1] {
    void faxDocument();
}

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

AScanner

BPrinter

CFaxMachine

DCopier

Attempts:

3 left

💡 Hint

Common Mistakes

Putting fax method in Printer or Scanner interfaces.

The FaxMachine interface should contain the faxDocument method to keep interfaces focused and small.

4fill in blank

hard

Fill both blanks to define interfaces for printing and scanning separately.

LLD

interface [1] {
    void printDocument();
}
interface [2] {
    void scanDocument();
}

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

APrinter

BScanner

CFaxMachine

DCopier

Attempts:

3 left

💡 Hint

Common Mistakes

Using the same interface for both printing and scanning.

Separating printing and scanning into Printer and Scanner interfaces follows the Interface Segregation Principle.

5fill in blank

hard

Fill all three blanks to define a multi-function device implementing separate interfaces.

LLD

class MultiFunctionDevice implements [1], [2], [3] {
    public void printDocument() { /* implementation */ }
    public void scanDocument() { /* implementation */ }
    public void faxDocument() { /* implementation */ }
}

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

APrinter

BScanner

CFaxMachine

DCopier

Attempts:

3 left

💡 Hint

Common Mistakes

Implementing a single large interface instead of multiple small ones.

The class implements Printer, Scanner, and FaxMachine interfaces to follow the Interface Segregation Principle by using focused interfaces.