Accenture API Testing Interview Questions -

Introduction – Why API Testing Is Important in Accenture Interviews

At Accenture, many projects involve enterprise-scale digital applications across domains such as:

Banking

Insurance

Healthcare

Retail

Cloud platforms

Microservices architectures

In modern enterprise systems, APIs act as the backbone connecting:

Web applications

Mobile applications

Databases

Third-party services

Cloud platforms

Because of this, API testing has become one of the most important skills for QA professionals in Accenture projects.

That is why Accenture API testing interview questions are commonly asked in:

Manual Testing interviews

Automation Testing interviews

API and Backend Testing roles

Digital QA profiles

Agile QA interviews

Accenture interviewers generally focus on:

Clear understanding of API testing fundamentals

Practical knowledge of REST APIs

Strong understanding of HTTP methods and status codes

Hands-on exposure to Postman and SoapUI

Basic awareness of automation using Java or Python

Ability to explain real-time project scenarios

This guide is written in a simple, interview-focused style suitable for:

Freshers

Lateral hires

Experienced QA engineers

Automation testers

The content closely aligns with real Accenture interview patterns and practical enterprise testing expectations.

What Is API Testing? (Simple & Interview-Friendly)

API testing is a type of software testing that validates the functionality, reliability, performance, and security of APIs (Application Programming Interfaces) by sending requests and verifying responses.

Instead of testing the graphical user interface (UI), API testing focuses on backend communication between systems. APIs act as intermediaries that allow different software applications to exchange data and communicate with each other.

API testing verifies whether APIs:

Return correct responses

Process requests accurately

Handle errors properly

Maintain security standards

Perform efficiently under load conditions

Why API Testing Is Important

Modern applications depend heavily on APIs for communication between:

Web applications

Mobile applications

Databases

Third-party services

Cloud platforms

If APIs fail, important business operations may stop functioning properly.

Areas Validated in API Testing

Functional Validation

Checks whether APIs work according to business requirements.

Data Validation

Ensures API responses contain accurate data.

Error Handling

Validates how APIs behave under invalid conditions.

Security Validation

Checks authentication and authorization mechanisms.

Performance Validation

Measures response time and scalability.

Example

Sending a GET request to:

/users/1

and validating whether the correct user details are returned in the response.

Real-Time Scenario

In a banking application, API testing verifies whether account balance APIs return accurate balance information after successful authentication.

REST vs SOAP vs GraphQL (Accenture Project Context)

Feature	REST	SOAP	GraphQL
Data Format	JSON / XML	XML only	JSON
Performance	Fast	Slower	Optimized
Accenture Usage	Very High	High (banking)	Limited
Testing Tools	Postman, Rest Assured	SoapUI	Specialized
Interview Focus	High	Medium	Low

Unable to insert the picture

In accenture api testing interview questions, REST and SOAP are most discussed.

Accenture API Testing Interview Questions & Answers (100+)

Section 1: API & REST Basics (Q1–Q20)

What is API Testing?

API testing validates backend services by testing:

Requests

Responses

Business rules

Authentication

Integrations

Data handling

Instead of validating the UI, API testing focuses on backend functionality and communication between systems.

API testing is one of the most important testing areas in modern enterprise applications.

Why Is API Testing Important in Accenture Projects?

In Accenture projects, most applications are backend-driven enterprise systems.

These systems commonly involve:

Banking platforms

Insurance systems

Healthcare applications

Retail platforms

Cloud services

Microservices architectures

APIs connect:

Web applications

Mobile applications

Databases

Third-party systems

That is why API testing is considered a core skill in many Accenture QA and automation projects.

What is a REST API?

A REST API is an API that follows REST principles and uses HTTP methods for communication.

REST APIs are widely used because they are:

Lightweight

Scalable

Stateless

Easy to integrate

REST APIs are the most common APIs used in enterprise applications today.

What Does REST Stand For?

REST stands for Representational State Transfer.

It is an architectural style used for designing scalable web services and APIs.

REST APIs communicate over HTTP.

What Are REST Principles?

Important REST principles include:

Statelessness

Client-server separation

Cacheability

Uniform interface

These principles help create scalable and maintainable APIs.

What is an Endpoint?

An endpoint is a URL that represents an API resource.

Example:

/api/users

Endpoints define where API requests are sent.

Examples:

Retrieve customer data

Create orders

Update records

What is Request Payload?

Request payload is the data sent to the API.

Payloads are commonly used in:

POST requests

PUT requests

PATCH requests

Example:

{
“name”: “Riya”
}

The backend processes this data and returns a response.

What is Response Payload?

Response payload is the data returned by the API.

Example:

{
“id”: 101,
“name”: “Riya”
}

Testers validate response payloads to ensure backend correctness.

What is Statelessness?

Statelessness means each request is independent and does not store session data.

Each request must contain all required information such as:

Authentication token

Headers

Parameters

Stateless APIs are easier to scale and maintain.

What is Idempotency?

Idempotency means the same request gives the same result every time.

Examples of idempotent methods:

DELETE

Idempotency is important for:

Retry handling

Distributed systems

Transaction safety

Difference Between PUT and PATCH

PUT

PUT updates the entire resource.

Example:

Updating complete customer profile

PATCH

PATCH updates only selected fields.

Example:

Updating address only

Updating email only

PATCH is used for partial updates.

What is Authentication?

Authentication means verifying user identity.

Authentication ensures that only valid users or systems can access APIs.

What is Authorization?

Authorization means verifying user access rights.

Authorization determines:

What users can access

What operations users can perform

Authorization failures are considered critical security defects.

Common Authentication Methods in Accenture Projects

Bearer Token

Most common token-based authentication method used in REST APIs.

OAuth

Widely used authorization framework for secure enterprise integrations.

Basic Authentication

Uses username and password in request headers.

These methods are frequently discussed in enterprise API interviews.

What is JWT?

JWT stands for JSON Web Token.

JWT is commonly used for stateless authentication.

JWT usually contains:

User information

Expiry details

Digital signature

JWT-based authentication is widely used in modern applications.

What is JSON?

JSON stands for JavaScript Object Notation.

It is the most common format used in REST APIs.

Example:

{
“id”: 101,
“name”: “Riya”
}

JSON is lightweight and easy to parse.

What is XML?

XML stands for Extensible Markup Language.

It is commonly used in SOAP APIs and enterprise integrations.

Example:

XML is still important in banking and healthcare systems.

What is Positive Testing?

Positive testing means testing APIs with valid input.

The goal is to verify expected backend behavior.

Examples:

Valid login credentials

Proper payload format

Valid authentication token

What is Negative Testing?

Negative testing means testing APIs with invalid input.

Examples:

Invalid token

Missing fields

Incorrect payload format

Negative testing improves backend stability and security.

What is API Documentation?

API documentation explains how to use an API.

It usually contains:

Endpoints

Request payloads

Response examples

Authentication details

Status codes

Good documentation helps testers understand backend behavior clearly.

HTTP Methods – Frequently Asked in Accenture Interviews

Method	Purpose
GET	Retrieve data
POST	Create new data
PUT	Update full resource
PATCH	Update partial resource
DELETE	Remove resource

Interviewers frequently ask real-world examples for each method.

HTTP Status Codes – Must-Know for Accenture API Interviews

Code	Meaning	Example
200	OK	Successful GET
201	Created	Successful POST
204	No Content	Successful DELETE
400	Bad Request	Invalid input
401	Unauthorized	Invalid token
403	Forbidden	Access denied
404	Not Found	Resource missing
409	Conflict	Duplicate data
422	Validation Error	Business rule failure
500	Server Error	Backend issue

Strong testers understand both technical meaning and business impact.

Section 2: API Validation, Tools & Automation

Which Tools Are Commonly Used for API Testing in Accenture?

Commonly used tools include:

Postman

SoapUI

REST Assured

Python requests library

Different projects may use different tools depending on technology stack and client requirements.

Why Is Postman Popular in Accenture Projects?

Postman is popular because it is:

Easy to use

Fast for manual API testing

Good for debugging

Beginner-friendly

Postman is commonly used for:

Sending requests

Response validation

Authentication testing

API chaining

What Validations Are Performed in API Testing?

Important API validations include:

Status code validation

Response body validation

Header validation

Schema validation

Response time validation

Business logic validation

Strong API testing always validates more than transport success.

Is Checking Status Code Enough?

No.

A successful status code does not guarantee correct backend functionality.

Strong testers additionally validate:

Response payload

Business calculations

Database consistency

Authentication behavior

Error handling

Business validation is extremely important in enterprise systems.

What is Header Validation?

Header validation means validating headers such as:

Authorization

Content-Type

Headers are important for security and communication.

What is Schema Validation?

Schema validation means validating API response structure.

It ensures:

Required fields exist

Correct data types are returned

API contracts remain stable

Schema validation helps detect breaking changes.

What is Response Time Testing?

Response time testing validates API performance.

It checks whether APIs respond within acceptable time limits.

Performance validation is important in scalable enterprise systems.

What is API Smoke Testing?

API smoke testing is a basic health check of critical APIs.

Smoke testing helps identify major failures quickly before detailed testing begins.

What is API Regression Testing?

API regression testing means re-testing APIs after changes.

The goal is to ensure:

Existing functionality still works

New changes do not break old behavior

Regression testing is very important in agile projects.

What is API Chaining?

API chaining means using the response of one API in another API request.

Example:

Token used in order API

API chaining is common in enterprise workflows.

What is API Mocking?

API mocking means simulating API responses when backend is unavailable.

Mock APIs are useful when:

Backend development is incomplete

Third-party systems are unstable

Dependency isolation is required

Mocking improves testing flexibility.

What is Rate Limiting?

Rate limiting restricts the number of API requests allowed within a time period.

It protects systems from:

API abuse

Excessive traffic

Performance degradation

Rate limiting is important for backend stability.

What is Concurrency Testing?

Concurrency testing means testing multiple requests simultaneously.

It helps identify:

Race conditions

Duplicate transactions

Performance bottlenecks

Data conflicts

Concurrency testing is important in distributed systems.

What is Backend Validation?

Backend validation means validating database updates after API calls.

Examples:

Record creation

Status updates

Transaction consistency

Backend validation ensures APIs correctly update backend systems.

What is API Security Testing?

API security testing validates:

Authentication

Authorization

Sensitive data exposure

Token handling

Security testing is critical in enterprise applications.

What is Environment Testing?

Environment testing means testing APIs across:

Development

Production

Different environments may behave differently because of configurations and data variations.

What is API Contract Testing?

API contract testing validates client-server agreement.

It ensures:

Request formats remain stable

Response structures remain stable

Consumers are not broken

Contract testing is important in microservices systems.

What is Data-Driven API Testing?

Data-driven API testing means testing APIs using multiple datasets.

Benefits include:

Better coverage

Reusability

Reduced duplication

This approach is commonly used in automation frameworks.

What is Logging in API Testing?

Logging means capturing request and response details during execution.

Logging helps with:

Debugging failures

Troubleshooting issues

Analyzing backend behavior

Good logging improves defect analysis efficiency.

What is CI/CD Integration?

CI/CD integration means running API tests automatically in deployment pipelines.

Benefits include:

Faster feedback

Early defect detection

Continuous quality validation

Modern enterprise projects heavily use CI/CD pipelines.

What is Assertion?

Assertion means validation of expected results.

Assertions help validate:

Status codes

Response payloads

Headers

Business logic

Assertions are core concepts in automation testing.

What is TestNG/JUnit Used For?

TestNG and JUnit are testing frameworks used for:

Test execution

Reporting

Assertions

Parallel execution

These frameworks are commonly used with Selenium and Rest Assured.

What is Rest Assured?

REST Assured is a Java library used for REST API automation.

It helps testers:

Send HTTP requests

Validate responses

Perform assertions

Automate API testing

Rest Assured is widely used in Java automation frameworks.

What is Python requests Library?

The Python requests library is used for sending HTTP requests.

It helps with:

GET requests

POST requests

Authentication handling

JSON parsing

Python requests is very popular because of its simplicity.

Why API Testing Before UI Testing?

API testing helps identify backend issues early before UI testing begins.

Benefits include:

Faster debugging

Reduced UI dependency

Better stability

Early defect detection

Modern testing strategies usually prioritize backend API validation before extensive UI testing.

What is Pagination Testing?

Pagination testing validates:

Page size

Page number

Record count

Navigation consistency

Pagination testing is important for APIs returning large datasets.

What is Filtering Testing?

Filtering testing validates query parameters used for filtering API results.

Example:

/users?country=India

The API should return only filtered records.

What is Sorting Testing?

Sorting testing validates sorted API responses.

Examples:

Ascending order

Descending order

Date-based sorting

Alphabetical sorting

Sorting validation ensures data consistency.

What is Caching in APIs?

Caching means temporary storage of API responses.

Caching improves:

Performance

Response time

Scalability

However, improper caching can create stale data issues.

What is Cache Invalidation?

Cache invalidation means refreshing stale cached data.

Example:

Backend data updated

Cached response refreshed

Latest data returned

Proper cache invalidation is important for maintaining data consistency in distributed systems.

Real-Time API Validation Example (Accenture-Style) Request

POST /api/login

{
“username”: “accentureUser”,
“password”: “test@123”
}

This API request is used for authenticating users in enterprise applications.

Authentication APIs are among the most critical APIs because they control:

User access

Security validation

Session management

Access to protected resources

Communication between systems

In many Accenture projects, authentication APIs are widely used across:

Banking applications

Insurance systems

Healthcare platforms

Retail applications

Cloud-based enterprise systems

Response

{
“token”: “abc456”,
“expiresIn”: 3600
}

The response indicates successful authentication.

The backend generated:

Authentication token

Token expiry duration

The token is later used for secured API access and enterprise workflows.

Important Validations

Strong API testing always validates more than status codes.

Important Validations

Status code should be 200

Token should not be null

Token expiry should be valid

Token should work correctly for secured APIs

Invalid credentials should fail properly

Expired tokens should not allow access

Authentication headers should work correctly

Authentication validation is extremely important because security defects can impact entire enterprise systems.

Automation Snippets (Expected Knowledge)

Postman – Basic Test Script

pm.test(“Status code is 200”, function () {

pm.response.to.have.status(200);

});

This Postman validation checks whether the API returned a successful response.

Why This Validation Matters

Status code validation confirms successful API execution.

However, strong testers additionally validate:

Response payload

Authentication behavior

Business logic

Error handling

Security validation

Enterprise API testing always goes beyond transport-level validation.

Rest Assured (Java)

given()

.contentType(“application/json”)

.body(payload)

.when()

.post(“/login”)

.then()

.statusCode(200);

This Rest Assured example validates login APIs using Java automation.

Why Rest Assured Is Important

REST Assured is widely used because it helps testers:

Automate API validation

Perform assertions

Validate responses

Integrate with TestNG/JUnit

Support CI/CD pipelines

Rest Assured knowledge is highly valuable for automation-focused roles.

Python Requests

import requests

response = requests.get(url)

assert response.status_code == 200

This Python example validates API responses using the requests library.

Python API automation is popular because of:

Simplicity

Readability

Fast scripting

Lightweight automation

SoapUI – XPath Assertion

//token != “”

This XPath assertion validates that the response contains a non-empty token.

SoapUI is still commonly used in enterprise API testing environments.

Scenario-Based Accenture API Testing Interview Questions

Modern Accenture interviews strongly focus on real-world API testing scenarios.

API Returns 200 but Wrong Data – How Do You Detect?

A successful status code does not guarantee correct backend functionality.

Validation Approach

Validate response payload

Compare with expected business rules

Validate backend database values

Verify calculations

Check downstream integrations

Strong testers validate business correctness, not just HTTP success.

Duplicate Transaction Created – How Do You Test This?

Duplicate transaction testing is extremely important in banking and enterprise systems.

Validation Steps

Send repeated requests intentionally

Retry the same transaction multiple times

Validate idempotency behavior

Check database for duplicate records

Verify concurrency handling

Expected Result

System should prevent duplicate transaction creation.

Duplicate handling is critical in payment and transaction systems.

API Accepts Invalid Input – Is It a Defect?

Yes.

This indicates missing backend validation.

Missing Validations May Include

Mandatory field validation

Boundary validation

Input format validation

Negative testing coverage

Negative testing is extremely important in enterprise APIs.

Token Expired but API Still Works – Security Issue?

Yes, this is a serious security issue.

Possible risks include:

Unauthorized access

Data exposure

Session hijacking

Compliance violations

Expected Behavior

Expired tokens should return:

401 Unauthorized

Authentication and authorization validation are critical testing areas.

API Returns 500 for Client Error – Correct Behavior?

Generally no.

Correct Error Handling

Client-side issues → 4xx

Server-side failures → 5xx

Examples:

Invalid payload → 400

Unauthorized access → 401

Backend crash → 500

Proper status codes improve debugging and integration reliability.

API Slow During Peak Hours – What Testing Is Required?

Performance testing should be executed.

Common Performance Tests

Load testing

Stress testing

Spike testing

Endurance testing

These tests help identify:

Scalability issues

Bottlenecks

Memory leaks

Performance degradation

Performance validation is critical for enterprise systems.

Partial Data Saved After Failure – How to Validate Rollback?

Rollback testing validates transaction consistency.

Validation Steps

Force backend failure intentionally

Validate database rollback

Ensure no partial records remain

Verify transaction consistency

Example

Payment failed

Inventory reduced

Expected:

Inventory rollback

No partial transaction saved

Rollback validation is very important in enterprise systems.

API Works in Postman but Fails in Application – Why?

Possible causes include:

Frontend integration issues

Missing headers

Authentication mismatch

Environment differences

CORS restrictions

This question evaluates debugging mindset and integration understanding.

Same Request Returns Different Responses – Reason?

Possible causes include:

Dynamic backend data

Cache inconsistency

Race conditions

Environment instability

Eventual consistency

Strong candidates understand distributed system behavior.

Unauthorized User Accesses Data – How to Test?

Authorization testing should validate:

Role-based access control

User permissions

Token scopes

Endpoint restrictions

Validation Steps

Access protected endpoint

Verify access denial

Expected Result

API should return:

403 Forbidden

Authorization defects are considered critical security vulnerabilities.

Schema Change Breaks Consumers – How to Prevent?

Schema validation and contract testing help prevent breaking changes.

Prevention Techniques

OpenAPI validation

Contract testing

Backward compatibility checks

Automated schema validation

Schema stability is critical in microservices architectures.

API Fails Only in Production – Possible Causes?

Possible causes include:

Environment configuration differences

Real production traffic

Security restrictions

Third-party dependency failures

Production-only data conditions

Production debugging ability is highly valued in experienced interviews.

Rate Limiting Not Implemented – Impact?

Missing rate limiting can lead to:

API abuse

Excessive traffic

Performance degradation

DDoS vulnerability

Expected Behavior

After request threshold:

429 Too Many Requests

Rate limiting protects backend systems from overload.

API Timeout Occurs – How to Test?

Timeout testing validates system behavior when dependencies become slow.

Validation Steps

Simulate slow downstream systems

Delay backend responses

Validate timeout handling

Verify retry behavior

Check graceful error handling

Timeout handling is important in distributed enterprise systems.

Backend Updated but UI Shows Old Data – Where Is the Issue?

This usually indicates:

Cache inconsistency

Frontend caching

Delayed synchronization

Stale API responses

Strong testers validate complete end-to-end consistency between frontend and backend systems.

How Accenture Interviewers Evaluate API Testing Answers

Accenture interviewers typically evaluate:

Clear understanding of API fundamentals

Ability to explain real project scenarios

Practical Postman knowledge

Logical and structured thinking

Simple and confident communication

Strong candidates explain:

Why validations matter

Business impact of failures

Backend workflow understanding

Real-world debugging approach

Clear explanations with practical examples usually score much higher than overly theoretical answers.

Accenture API Testing Interview Cheatsheet

Important Topics to Master

REST basics

HTTP methods

Status codes

Authentication

JSON handling

Postman practice

Response validation

Negative testing

Real-time scenarios

Enterprise backend workflows

Modern Accenture QA interviews strongly focus on backend understanding, practical validation skills, logical debugging ability, and real-world enterprise testing mindset.

FAQs – Accenture API Testing Interview Questions

Q1. Is API testing mandatory for Accenture QA roles?
Today, API testing has become extremely important for many QA roles at Accenture because most modern enterprise applications are heavily backend driven.

However, whether it is strictly “mandatory” depends on:

Project requirements

Client expectations

Role type

Experience level

Technology stack

For many modern QA and automation roles, basic API testing knowledge is highly expected and considered a valuable skill.

Q2. Is Postman enough for Accenture interviews?
For many QA and API testing interviews at Accenture, yes — strong Postman knowledge is often enough for:

Freshers

Manual QA roles

Entry-level API testing roles

Support testing projects

However, for experienced QA, automation, or backend-focused roles, Postman alone may not always be enough.

Q3. Do freshers need automation knowledge?
Today, freshers do not always need advanced automation knowledge to get QA jobs, but having at least basic automation awareness is becoming a strong advantage in modern software testing roles.

Many companies such as Accenture increasingly prefer candidates who understand both:

Manual testing fundamentals

Basic automation concepts

However, interviewers usually do not expect freshers to build advanced automation frameworks from the beginning.

Q4. Biggest mistake candidates make?
The biggest mistake candidates make in API testing interviews is focusing only on tools and status codes instead of understanding real business behavior and backend validation.

Many candidates think:

“I sent the request in Postman and got 200 OK, so the API works.”

But interviewers expect much deeper analysis, especially for candidates with around 2 years of experience.

1. Trusting Only 200 OK

This is the most common mistake.

Candidates often validate only:

Status code = 200

But APIs can still return incorrect business data.

Example

{
“total”: -500
}

The API technically succeeded, but the business logic is wrong.

Interviewers expect validation of:

Response body

Business calculations

Database updates

Schema

Headers

Workflow behavior

Not just status codes.

2. Knowing Only Basic Postman Usage

Many candidates only know:

Sending requests

Checking response

Viewing status code

But at 2 years experience, interviewers expect more advanced usage such as:

Assertions

API chaining

Dynamic variables

Pre-request scripts

Environment variables

Collection Runner

Negative testing

Example

pm.expect(r.total).to.eql(r.subtotal – r.discount + r.tax);

This demonstrates business validation thinking.

3. Ignoring Business Logic

API testing is not only technical testing.

Interviewers expect candidates to validate:

Discounts

Tax calculations

Order workflows

Payment handling

Access permissions

Duplicate prevention

Example Questions

Can duplicate orders happen?

Can unauthorized users access APIs?

Are invalid transactions blocked?

Does rollback work properly?

Business logic validation is one of the most important interview areas.

4. No Negative Testing Mindset

Many candidates test only happy paths.

Strong candidates always test:

Invalid payloads

Missing fields

Expired tokens

Invalid authentication

Boundary values

Special characters

Empty requests

Negative testing shows deeper understanding of API behavior.

5. Weak Debugging Approach

Weak answer:

“I will report the defect.”

Strong answer:

Check logs

Verify request payload

Compare database records

Validate headers

Analyze backend logic

Reproduce the issue

Check dependent services

Interviewers heavily evaluate troubleshooting ability at this level.

6. No Real-Time Scenario Thinking

Many candidates memorize definitions but struggle with practical questions.

Common interview scenarios:

API returns 200 but wrong data — what do you do?

Payment deducted but order not created — what testing applies?

Retry creates duplicate records — how prevent it?

Interviewers prefer practical thinking over memorized theory.

7. Weak Understanding of Authentication

Candidates commonly confuse:

Authentication

Authorization

JWT tokens

Bearer tokens

401 vs 403

These are among the most frequently asked API interview topics.

You should clearly understand:

How tokens work

How tokens expire

How tokens are passed

Role-based access control

8. No Automation Awareness

Some candidates think API testing means only manual testing in Postman.

But modern projects increasingly expect:

Basic automation knowledge

Assertions

API automation awareness

CI/CD basics

Even simple knowledge of:

Rest Assured

Python requests

Newman

creates a stronger profile.

9. Weak Assertions

Some candidates validate only:

pm.response.to.have.status(200);

Interviewers expect stronger validations such as:

Schema validation

Field validation

Business rule validation

Header validation

Range validation

Assertions should validate meaningful behavior, not just technical success.

10. Explaining “What” but Not “Why”

Weak answer:

“I validated response fields.”

Better answer:

“I validated totals and discounts because incorrect calculations may cause financial defects.”

Interviewers value reasoning and risk awareness.

Q5. How to prepare quickly for Accenture API interviews?
To prepare quickly for Accenture API testing interviews, focus on practical understanding instead of trying to learn everything deeply.

Accenture interviews usually focus on:

REST API fundamentals

Postman usage

Status codes

Real-time testing scenarios

Logical thinking

Clear communication

Interviewers generally prefer candidates who explain concepts clearly with practical examples.

Introduction – Why API Testing Is Important in Accenture Interviews

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