Binary file upload in Postman - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the request method for uploading a binary file in Postman.

Postman

pm.request.method = '[1]';

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

AGET

BPOST

CPUT

DDELETE

Attempts:

3 left

💡 Hint

Common Mistakes

Using GET instead of POST for uploading files.

The POST method is used to upload binary files in Postman requests.

2fill in blank

medium

Complete the code to set the request body mode to binary in Postman.

Postman

pm.request.body.mode = '[1]';

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

Abinary

Bformdata

Craw

Durlencoded

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'raw' or 'formdata' instead of 'binary' for file uploads.

Setting the body mode to 'binary' tells Postman to send the request body as a binary file.

3fill in blank

hard

Fix the error in the code to correctly assign the binary file path in Postman.

Postman

pm.request.body.binary = { 'src': '[1]' };

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

A/path/to/file.jpg

Bfile_path

Cfilepath

DfilePath

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names instead of actual file path strings.

The 'src' property must be set to the actual file path string where the binary file is located.

4fill in blank

hard

Fill both blanks to set the Content-Type header correctly for a binary file upload in Postman.

Postman

pm.request.headers.add({ key: '[1]', value: '[2]' });

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

AContent-Type

Bapplication/json

Capplication/octet-stream

DAccept

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Accept' instead of 'Content-Type' as the header key.

Using 'application/json' instead of 'application/octet-stream'.

The header key must be 'Content-Type' and the value should be 'application/octet-stream' for binary file uploads.

5fill in blank

hard

Fill all three blanks to write a test script that checks if the binary file upload response status is 200 and content-type is correct.

Postman

pm.test('Upload successful', () => {
  pm.response.to.have.status([1]);
  pm.expect(pm.response.headers.get('[2]')).to.eql('[3]');
});

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

A200

BContent-Type

Capplication/octet-stream

D201

Attempts:

3 left

💡 Hint

Common Mistakes

Using status 201 which means created but not always returned.

Checking wrong header keys or values.

The test checks that the response status is 200 (OK) and the Content-Type header matches 'application/octet-stream' indicating a successful binary upload.

Practice

1. In Postman, which Body tab option should you select to upload a binary file?

easy

A. GraphQL

B. Form-data

C. Binary

D. Raw

Solution

1. Step 1: Understand Postman Body tab options

   Postman offers multiple Body tab options like form-data, raw, binary, and GraphQL for different request types.

2. Step 2: Identify the correct option for file upload

   For uploading raw files such as images or documents, the 'Binary' option is used to send the file as-is.

3. Final Answer:

   Binary -> Option C

4. Quick Check:

   Binary option = file upload [OK]

Hint: Use 'Binary' in Body tab to upload files directly [OK]

Common Mistakes:

• Choosing 'form-data' which is for key-value pairs
• Using 'raw' which sends text data, not files
• Selecting 'GraphQL' which is unrelated to file upload

2. Which of the following is the correct way to select a file for binary upload in Postman?

easy

A. Enter file path in URL field

B. Click 'Choose Files' after selecting 'form-data' in Body tab

C. Paste file content in 'raw' Body tab

D. Click 'Select File' after choosing 'binary' in Body tab

Solution

1. Step 1: Identify the correct Body tab for binary upload

   Binary upload requires selecting the 'binary' option in the Body tab.

2. Step 2: Understand file selection process

   After choosing 'binary', Postman shows a 'Select File' button to browse and pick the file to upload.

3. Final Answer:

   Click 'Select File' after choosing 'binary' in Body tab -> Option D

4. Quick Check:

   Binary + Select File = correct file upload [OK]

Hint: Always pick 'Select File' after choosing 'binary' [OK]

Common Mistakes:

• Trying to upload file in 'form-data' without key
• Pasting file content in 'raw' which is for text
• Entering file path in URL which is invalid

3. Given this Postman setup: Body tab set to 'binary' with a valid image file selected, what is the expected server response if the upload succeeds?

medium

A. HTTP 200 OK with success message

B. HTTP 404 Not Found

C. HTTP 500 Internal Server Error

D. HTTP 401 Unauthorized

Solution

1. Step 1: Understand typical server responses for file upload

   A successful file upload usually returns HTTP status 200 OK with a confirmation message.

2. Step 2: Analyze other status codes

   404 means resource missing, 500 means server error, 401 means unauthorized access; none indicate success.

3. Final Answer:

   HTTP 200 OK with success message -> Option A

4. Quick Check:

   Success upload = HTTP 200 OK [OK]

Hint: Success = HTTP 200 OK status [OK]

Common Mistakes:

• Confusing 404 as success
• Assuming 500 means success
• Ignoring authentication errors like 401

4. You tried uploading a binary file in Postman but the server responds with HTTP 400 Bad Request. What is the most likely cause?

medium

A. Server is down

B. File was not selected in the binary Body tab

C. Incorrect HTTP method used

D. File size is zero bytes

Solution

1. Step 1: Understand HTTP 400 Bad Request meaning

   This status means the server could not understand the request due to invalid syntax or missing data.

2. Step 2: Identify common binary upload mistakes

   If no file is selected in the binary Body tab, the request lacks the file data, causing a bad request error.

3. Final Answer:

   File was not selected in the binary Body tab -> Option B

4. Quick Check:

   Missing file = HTTP 400 Bad Request [OK]

Hint: Always select a file before sending binary upload [OK]

Common Mistakes:

• Assuming server down causes 400 error
• Using wrong HTTP method without checking
• Uploading empty files without validation

5. You want to automate testing of binary file uploads in Postman using tests. Which script snippet correctly checks if the upload was successful by verifying HTTP status 200?

hard

A. pm.test('Upload success', () => pm.response.to.have.status(200));

B. pm.test('Upload success', () => pm.response.status === '200');

C. pm.test('Upload success', () => pm.response.code == '200');

D. pm.test('Upload success', () => pm.response.statusCode === 'OK');

Solution

1. Step 1: Understand Postman test syntax

   Postman uses pm.test with a callback function and assertion methods like pm.response.to.have.status(200) to check status codes.

2. Step 2: Evaluate each option's correctness

   pm.test('Upload success', () => pm.response.to.have.status(200)); uses correct assertion syntax. pm.test('Upload success', () => pm.response.status === '200'); incorrectly compares number status to string '200'. pm.test('Upload success', () => pm.response.code == '200'); uses wrong property (code is 'OK') and type. pm.test('Upload success', () => pm.response.statusCode === 'OK'); uses invalid statusCode and string.

3. Final Answer:

   pm.test('Upload success', () => pm.response.to.have.status(200)); -> Option A

4. Quick Check:

   Use pm.response.to.have.status(200) for status check [OK]

Hint: Use pm.response.to.have.status(200) in Postman tests [OK]

Common Mistakes:

• Using equality instead of assertion methods
• Comparing status code as string instead of number
• Using wrong property names for response status