Why understanding protocols enables design decisions in HLD - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the protocol used for communication.

HLD

if message.protocol == '[1]':
    process_http(message)

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

AHTTP

BSMTP

CFTP

DTCP

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing HTTP with FTP or SMTP protocols.

The code checks if the message protocol is HTTP to process it accordingly.

2fill in blank

medium

Complete the code to select the right protocol for secure data transfer.

HLD

if use_encryption:
    protocol = '[1]'
else:
    protocol = 'HTTP'

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

AFTP

BTCP

CHTTPS

DSMTP

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing FTP or TCP which are not secure by default.

HTTPS is the secure version of HTTP, used for encrypted data transfer.

3fill in blank

hard

Fix the error in the protocol check to avoid runtime failure.

HLD

if message.protocol == [1]:
    process_message(message)

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

AHttp

BHTTP

Chttp

D'HTTP'

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted protocol names causing syntax errors.

The protocol name must be a string literal, so it needs quotes.

4fill in blank

hard

Fill both blanks to correctly define a protocol handler function.

HLD

def handle_[1](message):
    if message.protocol == '[2]':
        process_[1](message)

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

Ahttp

Bftp

CHTTP

DFTP

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing case between function name and protocol string.

The function name uses lowercase 'http' while the protocol string is uppercase 'HTTP'.

5fill in blank

hard

Fill all three blanks to create a dictionary mapping protocols to ports.

HLD

protocol_ports = {
    '[1]': [2],
    '[3]': 443
}

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

AHTTP

B80

CHTTPS

D21

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing port numbers or protocol names.

HTTP uses port 80 and HTTPS uses port 443 for secure communication.