Daily and shift reports in SCADA systems - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to schedule a daily report generation at midnight.

SCADA systems

schedule.every().day.at("[1]:00").do(generate_report)

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

A23

B12

C00

D06

Attempts:

3 left

💡 Hint

Common Mistakes

Using 12 (noon) instead of midnight

Using 23 (11 PM) instead of 00

The daily report should be scheduled at midnight, which is "00:00" in 24-hour format.

2fill in blank

medium

Complete the code to generate a shift report every 8 hours.

SCADA systems

schedule.every([1]).hours.do(generate_shift_report)

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

A24

B6

C12

D8

Attempts:

3 left

💡 Hint

Common Mistakes

Using 6 or 12 hours which do not match typical shift lengths

Using 24 hours which is daily, not shift-based

Shift reports are generated every 8 hours to cover three shifts in a day.

3fill in blank

hard

Fix the error in the code to correctly log the report generation time.

SCADA systems

log.info(f"Report generated at: [1]")

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

Adatetime.now()

Bdatetime.now

Ddatetime.now()()

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting parentheses after now

Adding extra parentheses causing syntax errors

datetime.now() is a function call that returns the current date and time. Omitting parentheses or adding extra ones causes errors.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps shift names to their durations in hours.

SCADA systems

shift_hours = {shift.[1]: shift.[2] for shift in shifts}

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

Aname

Bduration

Cid

Dstart_time

Attempts:

3 left

💡 Hint

Common Mistakes

Using shift.id or shift.start_time which are not descriptive for this mapping

The dictionary keys should be shift names and values should be their durations.

5fill in blank

hard

Fill all three blanks to filter and create a report dictionary for shifts longer than 6 hours.

SCADA systems

report = {shift.name: shift.duration for shift in shifts if shift.[2] {{BLANK_3}} 6}

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

A{shift.name: shift.duration}

Bduration

C>

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect attribute names or comparison operators

Not using dictionary comprehension syntax

The dictionary comprehension creates a mapping of shift names to durations only for shifts where duration is greater than 6 hours.

Practice

1. What is the main purpose of daily and shift reports in SCADA systems?

easy

A. To summarize system data for specific time periods

B. To control hardware devices directly

C. To update software automatically

D. To backup the entire system data

Solution

1. Step 1: Understand report function

   Daily and shift reports collect and summarize data over set time periods.

2. Step 2: Identify main goal

   The goal is to provide a clear summary of system performance and events during those periods.

3. Final Answer:

   To summarize system data for specific time periods -> Option A

4. Quick Check:

   Reports summarize data = D [OK]

Hint: Reports summarize data by time period, not control or backup [OK]

Common Mistakes:

• Confusing reports with control commands
• Thinking reports update software
• Assuming reports backup data

2. Which of the following is the correct way to specify a shift report for the night shift (10 PM to 6 AM) in a SCADA report configuration?

easy

A. shift_start = '22:00'; shift_end = '06:00'

B. shift_start = '06:00'; shift_end = '22:00'

C. shift_start = '10:00'; shift_end = '18:00'

D. shift_start = '00:00'; shift_end = '08:00'

Solution

1. Step 1: Identify night shift hours

   The night shift runs from 10 PM (22:00) to 6 AM (06:00).

2. Step 2: Match correct time format

   shift_start = '22:00'; shift_end = '06:00' correctly sets shift_start to '22:00' and shift_end to '06:00'.

3. Final Answer:

   shift_start = '22:00'; shift_end = '06:00' -> Option A

4. Quick Check:

   Night shift = 22:00 to 06:00 [OK]

Hint: Night shift starts at 22:00, ends at 06:00 [OK]

Common Mistakes:

• Mixing AM and PM times
• Using 12-hour format without AM/PM
• Swapping start and end times

3. Given this SCADA report script snippet:

data = [10, 20, 30, 40]
report_sum = sum(data)
report_avg = report_sum / len(data)
print(report_avg)

What will be the output?

medium

A. 20

B. 30

C. 25.0

D. SyntaxError

Solution

1. Step 1: Calculate sum of data

   Sum = 10 + 20 + 30 + 40 = 100.

2. Step 2: Calculate average

   Average = 100 / 4 = 25.0.

3. Final Answer:

   25.0 -> Option C

4. Quick Check:

   Average of [10,20,30,40] = 25.0 [OK]

Hint: Sum then divide by count to get average [OK]

Common Mistakes:

• Dividing by wrong length
• Adding incorrectly
• Confusing sum with average

4. You have this report configuration snippet:

shift_start = '22:00'
shift_end = '06:00'
if shift_start > shift_end:
    print('Invalid shift times')

Why does this code print 'Invalid shift times' even if the shift crosses midnight?

medium

A. Because shift_start and shift_end are not defined

B. Because string comparison does not handle time crossing midnight correctly

C. Because the if condition is always true

D. Because print statement is inside a comment

Solution

1. Step 1: Understand string comparison of times

   Comparing times as strings ('22:00' > '06:00') compares lexicographically, not by clock time.

2. Step 2: Recognize midnight crossing issue

   Times crossing midnight (e.g., '22:00' to '06:00') fail because '22:00' > '06:00' is true, but string comparison doesn't reflect time logic.

3. Final Answer:

   Because string comparison does not handle time crossing midnight correctly -> Option B

4. Quick Check:

   String compare ≠ time logic [OK]

Hint: String compare fails for times crossing midnight [OK]

Common Mistakes:

• Assuming string compare works for times
• Thinking condition is always true
• Ignoring midnight crossing logic

5. You want to generate a daily report that includes total production and average temperature for each shift. Which approach best combines these requirements in a SCADA report script?

hard

A. Calculate averages first, then total production for the whole day

B. Calculate total production only and ignore temperature

C. Generate separate reports for production and temperature without combining

D. Calculate totals and averages separately for each shift, then combine results in one report

Solution

1. Step 1: Identify report requirements

   Report must include total production and average temperature per shift.

2. Step 2: Choose method to combine data

   Calculating totals and averages separately per shift then combining into one report meets all requirements clearly.

3. Final Answer:

   Calculate totals and averages separately for each shift, then combine results in one report -> Option D

4. Quick Check:

   Combine metrics per shift in one report [OK]

Hint: Calculate each metric per shift, then combine [OK]

Common Mistakes:

• Ignoring temperature data
• Splitting reports unnecessarily
• Mixing daily and shift calculations incorrectly