First API request in Postman - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the response status code of this GET request?

You send a GET request to https://jsonplaceholder.typicode.com/posts/1 using Postman. What is the expected HTTP status code in the response?

Postman

GET https://jsonplaceholder.typicode.com/posts/1

A 404

B 500

C 200

D 301

💡 Hint

A successful GET request to a valid resource usually returns this status code.

The endpoint returns a valid post, so the server responds with 200 OK status code.

❓ assertion

intermediate

Which assertion correctly verifies the response body contains userId 1?

You receive this JSON response body from the API: {"userId": 1, "id": 1, "title": "...", "body": "..."}. Which Postman test script assertion correctly checks that userId equals 1?

Postman

pm.test("User ID is 1", function () {
    // assertion here
});

A pm.expect(pm.response.json().userId).to.eql(1);

B pm.expect(pm.response.json().userId).to.be.undefined;

C pm.expect(pm.response.json().userId).to.be.null;

D pm.expect(pm.response.json().userId).to.be.above(1);

💡 Hint

Check for exact equality of userId to 1.

Option A correctly asserts that userId in the JSON response equals 1.

❓ locator

advanced

Which JSON path correctly locates the title in the response?

Given the JSON response: {"userId": 1, "id": 1, "title": "foo", "body": "bar"}, which JSON path expression correctly selects the title value?

A $.title

B $.id.title

C $.userId.title

D $.body.title

💡 Hint

The title is a top-level key in the JSON object.

The JSON path $.title selects the title key at the root level.

🔧 Debug

advanced

Why does this Postman test script fail?

Test script: pm.test("Check status", () => { pm.expect(pm.response.code).to.equal(200); }); Why does this test always fail even if the response status is 200?

Postman

pm.test("Check status", () => {
    pm.expect(pm.response.code).to.equal(200);
});

A The test name string must be outside pm.test parentheses

B pm.expect syntax is incorrect; should be pm.assert

C The arrow function syntax is invalid in Postman tests

D pm.response.code is undefined; correct property is pm.response.status

💡 Hint

Check the correct property name for response status code in Postman scripts.

pm.response.code does not exist; the correct property is pm.response.status.

❓ framework

expert

Which Postman feature allows running tests automatically after each request?

You want to automate running your test scripts every time you send a request in Postman. Which feature should you use?

A Pre-request scripts

B Tests tab scripts

C Collection Runner

D Monitor

💡 Hint

Tests tab scripts run after the response is received.

Scripts in the Tests tab run automatically after each request to validate the response.