Batch reporting in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start the batch report generation process.

SCADA systems

start_batch_report([1])

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

Abatch_id

Breport_id

Cuser_id

Dtimestamp

Attempts:

3 left

💡 Hint

Common Mistakes

Using report_id instead of batch_id

Passing user_id which is unrelated here

The batch report process requires the batch_id to identify which batch to report on.

2fill in blank

medium

Complete the code to check if the batch report is complete.

SCADA systems

if check_report_status([1]) == 'complete':

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

Areport_id

Bbatch_id

Cuser_id

Dstatus_code

Attempts:

3 left

💡 Hint

Common Mistakes

Using report_id which may not be linked directly

Passing status_code which is a result, not input

The function check_report_status needs the batch_id to check the status of that batch's report.

3fill in blank

hard

Fix the error in the code to correctly fetch batch report data.

SCADA systems

data = fetch_batch_data([1])

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

Auser_id

Breport_data

Cbatch_id

Dbatch_status

Attempts:

3 left

💡 Hint

Common Mistakes

Passing report_data which is the output, not input

Using batch_status which is unrelated here

The function fetch_batch_data requires the batch_id to retrieve the correct data.

4fill in blank

hard

Fill both blanks to filter batch reports by status and date.

SCADA systems

filtered_reports = filter_reports(status=[1], date=[2])

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

A'complete'

B'pending'

C'2024-01-01'

D'2023-12-31'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pending' status when looking for completed reports

Choosing wrong date format

We want to filter reports that are complete and from 2024-01-01.

5fill in blank

hard

Fill all three blanks to create a summary dictionary for batch reporting.

SCADA systems

summary = { [1]: [2] for [3] in batch_data if batch_data[[3]]['status'] == 'complete' }

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

A'batch_id'

Bbatch_data[batch]['value']

Cbatch

D'value'

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys or values in the dictionary

Incorrect loop variable name

This dictionary comprehension creates a summary with batch_id as keys and their value for batches that are complete.

Practice

1. What is the main purpose of batch reporting in SCADA systems?

easy

A. To replace manual quality checks completely

B. To control the speed of individual machines

C. To monitor only the temperature of a single product

D. To collect and summarize data about groups of products made together

Solution

1. Step 1: Understand batch reporting concept

   Batch reporting gathers data about a group of products made in one production run.

2. Step 2: Identify main purpose

   This data helps track quality, timing, and conditions for the entire batch, not just one machine or product.

3. Final Answer:

   To collect and summarize data about groups of products made together -> Option D

4. Quick Check:

   Batch reporting = group data collection [OK]

Hint: Batch reporting = data about product groups, not single items [OK]

Common Mistakes:

• Thinking batch reporting controls machine speed
• Confusing batch data with single product data
• Assuming it replaces all manual checks

2. Which of the following is the correct way to represent a batch report entry in a SCADA system configuration?

easy

A. batch_report = { 'batch_id': 101, 'start_time': '08:00', 'status': 'complete' }

B. batch_report = [batch_id: 101, start_time: '08:00', status: 'complete']

C. batch_report = (batch_id=101, start_time='08:00', status='complete')

D. batch_report = 'batch_id=101; start_time=08:00; status=complete'

Solution

1. Step 1: Identify correct data structure syntax

   In SCADA system configs, batch reports are often stored as key-value pairs in dictionaries or JSON-like objects.

2. Step 2: Check each option

   batch_report = { 'batch_id': 101, 'start_time': '08:00', 'status': 'complete' } uses correct dictionary syntax with keys and values. Options A and C use invalid syntax for dictionaries. batch_report = 'batch_id=101; start_time=08:00; status=complete' is a string, not a structured entry.

3. Final Answer:

   batch_report = { 'batch_id': 101, 'start_time': '08:00', 'status': 'complete' } -> Option A

4. Quick Check:

   Dictionary syntax = batch_report = { 'batch_id': 101, 'start_time': '08:00', 'status': 'complete' } [OK]

Hint: Use curly braces and colons for key-value pairs [OK]

Common Mistakes:

• Using square brackets with colons (invalid)
• Using parentheses like tuples with equals
• Storing data as plain strings instead of structured

3. Given this batch report data snippet:

batch = { 'id': 202, 'start': '09:00', 'end': '10:30', 'status': 'running' }
print(batch['status'])

What will be the output?

medium

A. None

B. complete

C. running

D. error

Solution

1. Step 1: Understand dictionary access

   The code accesses the value of the key 'status' in the batch dictionary.

2. Step 2: Check the value of 'status'

   In the dictionary, 'status' is set to 'running', so print(batch['status']) outputs 'running'.

3. Final Answer:

   running -> Option C

4. Quick Check:

   batch['status'] = 'running' [OK]

Hint: Print dictionary key value to get output [OK]

Common Mistakes:

• Assuming status is 'complete' without checking
• Expecting an error due to missing key
• Confusing key names or case sensitivity

4. You have this batch report code snippet:

batch = { 'id': 303, 'start': '11:00', 'end': '12:00' }
print(batch['status'])

What is the error and how to fix it?

medium

A. KeyError because 'status' key is missing; add 'status' key to batch

B. SyntaxError due to missing comma; add comma after 'end' value

C. TypeError because batch is not a dictionary; convert to dict

D. No error; output will be None

Solution

1. Step 1: Identify the error type

   Accessing batch['status'] when 'status' key does not exist causes a KeyError.

2. Step 2: Fix the error

   Add a 'status' key with a value to the batch dictionary to avoid the error.

3. Final Answer:

   KeyError because 'status' key is missing; add 'status' key to batch -> Option A

4. Quick Check:

   Missing key access = KeyError [OK]

Hint: Check all keys exist before accessing [OK]

Common Mistakes:

• Assuming missing keys return None
• Thinking it's a syntax error
• Confusing data types causing TypeError

5. You want to generate a batch report summary that includes batch ID, total duration (in minutes), and status from this data:

batch = { 'id': 404, 'start': '13:15', 'end': '14:45', 'status': 'complete' }

Which Python code correctly calculates and prints the summary?

hard

A. duration = batch['end'] - batch['start']
print(f"Batch {batch['id']} took {duration} minutes and is {batch['status']}")

B. from datetime import datetime
start = datetime.strptime(batch['start'], '%H:%M')
end = datetime.strptime(batch['end'], '%H:%M')
duration = (end - start).seconds // 60
print(f"Batch {batch['id']} took {duration} minutes and is {batch['status']}")

C. duration = int(batch['end']) - int(batch['start'])
print(f"Batch {batch['id']} took {duration} minutes and is {batch['status']}")

D. print(f"Batch {batch['id']} took {batch['end'] - batch['start']} minutes and is {batch['status']}")

Solution

1. Step 1: Parse time strings to datetime objects

   Use datetime.strptime with '%H:%M' format to convert 'start' and 'end' strings to datetime objects.

2. Step 2: Calculate duration in minutes

   Subtract start from end to get timedelta, then convert seconds to minutes using integer division.

3. Step 3: Print formatted summary

   Use f-string to print batch ID, duration, and status clearly.

4. Final Answer:

   from datetime import datetime start = datetime.strptime(batch['start'], '%H:%M') end = datetime.strptime(batch['end'], '%H:%M') duration = (end - start).seconds // 60 print(f"Batch {batch['id']} took {duration} minutes and is {batch['status']}") -> Option B

5. Quick Check:

   Parse times + timedelta = correct duration [OK]

Hint: Convert times to datetime before subtracting [OK]

Common Mistakes:

• Subtracting strings directly
• Converting times to int without parsing
• Ignoring time format in calculations