Skip taskB taskC when task A is failed even though conditions of taskB & taskC are met

Question

Q1: I have a single job in ADO YAML pipeline which have 4-5 tasks under steps. I want to trigger those tasks based on few conditions so I've used ADO Expressions. But now i want to skip the taskB when taskA fails. By default it should happen but seems like my task condition is overriding the continueonerror:false

Can you suggest how to do this ? tried alternative workaround: Multi Job Pipeline setup with 1 task in 1 job & it works fine for us, but want to know how we can setup for multiple tasks in a single job ?

Q2 : Even if i can get taskA status as a variable using REST API & set variable concepts, how can i add multiple conditions in task.something like " variable1=succeeded & variable2 = p1 or variable3 = p2 "

https://learn.microsoft.com/en-us/azure/devops/pipelines/process/expressions?view=azure-devops

Sample yaml

parameters:

variables:

trigger:

steps:
  task: A
  continueonerror:false
condition: or(eq(v1, p3), eq(v2, 3), eq(v4, 5))

  task: B
  continueonerror:false
condition: or(eq(v1, p1), eq(v2, 6))

  task: C
  continueonerror:false
condition: or(eq(v1, p2), eq(v2, 8))

Answer 1

According to your expectation to skip TaskB if TaskA fails, you may consider adding succeeded() as part of the condition in TaskB together with your other evaluations. Kindly take the following sample YAML for a reference.

trigger: none
parameters:
- name: p1
  default: 1
- name: p2
  default: 2
- name: p3
  default: 3
variables:
  v1: 2
  v2: 6
  v3: 2
  v4: 5

steps:
- script: |
    echo A
    echo "##vso[task.logissue type=error]Simulate task failure."
    exit 1
  name: TaskA
# continueOnError: true
  condition: or(eq(variables['v1'], ${{ parameters.p3 }}), eq(variables['v2'], 3), eq(variables['v4'], 5))
- script: echo B
  name: TaskB
  condition: and(succeeded(), or(eq(variables['v1'], ${{ parameters.p1 }}), eq(variables['v2'], 6)))
- script: echo C
  name: TaskC
  condition: and(succeededOrFailed(), or(eq(variables['v1'], ${{ parameters.p2 }}), eq(${{ parameters.p2 }}, 8)))

When TaskA failed the condition evaluation of succeeded() for TaskB would be False; hence TaskB was skipped.

TaskC uses succeededOrFailed() in its condition and will continue to run, even if a previous dependency has failed, unless the run was canceled.

See more information on Specify conditions.