---
title: FakeCairo (v0.26)
description: API reference for qiskit_ibm_runtime.fake_provider.FakeCairo in qiskit-ibm-runtime v0.26
source: https://quantum.cloud.ibm.com/docs/en/api/qiskit-ibm-runtime/0.26/fake-provider-fake-cairo
---

# FakeCairo

*class* `FakeCairo`

[GitHub](https://github.com/Qiskit/qiskit-ibm-runtime/tree/stable/0.26/qiskit_ibm_runtime/fake_provider/backends/cairo/fake_cairo.py#L31-L38)

A fake 27 qubit backend.

FakeBackend initializer.

**Parameters**

- **configuration** (*BackendConfiguration*) – backend configuration
- **time\_alive** (*int*) – time to wait before returning result

## Attributes

### backend\_name

Default value: `'fake_cairo'`

### conf\_filename

Default value: `'conf_cairo.json'`

### defs\_filename

Default value: `'defs_cairo.json'`

### dirname

Default value: `'/home/runner/work/qiskit-ibm-runtime/qiskit-ibm-runtime/qiskit_ibm_runtime/fake_provider/backends/cairo'`

### options

Return the options for the backend

The options of a backend are the dynamic parameters defining how the backend is used. These are used to control the [`run()`](#qiskit_ibm_runtime.fake_provider.FakeCairo.run "qiskit_ibm_runtime.fake_provider.FakeCairo.run") method.

### props\_filename

Default value: `'props_cairo.json'`

### version

Default value: `1`

## Methods

### configuration

`configuration()`

Return the backend configuration.

**Returns**

the configuration for the backend.

**Return type**

BackendConfiguration

### defaults

`defaults()`

[GitHub](https://github.com/Qiskit/qiskit-ibm-runtime/tree/stable/0.26/qiskit_ibm_runtime/fake_provider/fake_pulse_backend.py#L29-L33)

Returns a snapshot of device defaults

**Return type**

`PulseDefaults`

### name

`name()`

Return the backend name.

**Returns**

the name of the backend.

**Return type**

str

### properties

`properties()`

[GitHub](https://github.com/Qiskit/qiskit-ibm-runtime/tree/stable/0.26/qiskit_ibm_runtime/fake_provider/fake_qasm_backend.py#L43-L47)

Returns a snapshot of device properties

**Return type**

`BackendProperties`

### provider

`provider()`

Return the backend Provider.

**Returns**

the Provider responsible for the backend.

**Return type**

Provider

### run

`run(run_input, **kwargs)`

[GitHub](https://github.com/Qiskit/qiskit-ibm-runtime/tree/stable/0.26/qiskit_ibm_runtime/fake_provider/fake_backend.py#L744-L775)

Main job in simulator

### set\_options

`set_options(**fields)`

Set the options fields for the backend

This method is used to update the options of a backend. If you need to change any of the options prior to running just pass in the kwarg with the new value for the options.

**Parameters**

**fields** – The fields to update the options

**Raises**

**AttributeError** – If the field passed in is not part of the options

### status

`status()`

Return the backend status.

**Returns**

the status of the backend.

**Return type**

BackendStatus