Process management (running programs) in Intro to Computing - Draw & Build Visually

Draw This - beginner

Draw a flowchart showing the basic steps of process management when running a program: starting from the user launching the program, loading it into memory, executing instructions, waiting for input/output if needed, and finally terminating the process.

10 minutes

Hint 1

Hint 2

Hint 3

Hint 4

Grading Criteria

Start and End symbols present

Process steps represented by rectangles

Decision points represented by diamonds

Correct flow from start to termination

Includes loading, executing, I/O wait, and termination steps

Decision for input/output needed present

Decision for program completion present

Flow lines correctly connect all steps and decisions

Solution

  +-------+
  | Start |
  +---+---+
      |
      v
+-----------------+
| User launches    |
| the program      |
+--------+--------+
         |
         v
+-----------------+
| Load program    |
| into memory     |
+--------+--------+
         |
         v
+-----------------+
| Execute          |
| instructions     |
+--------+--------+
         |
         v
+-----------------+
| Need input/output?|
+--------+--------+
         |
    +----+----+
    |         |
   Yes       No
    |         |
    v         v
+--------+  +--------+
| Wait   |  | Continue|
| for I/O|  | execution|
+--------+  +--------+
    |         |
    +----+----+
         |
         v
+-----------------+
| Is program done? |
+--------+--------+
         |
    +----+----+
    |         |
   No        Yes
    |         |
    v         v
+-----------------+
| Continue        |
| executing       |
+--------+--------+
         |
         v
  +------+------+
  | Terminate   |
  | process     |
  +------+------+
         |
         v
      +--+--+
      | End |
      +-----+

This flowchart starts with the user launching a program. The program is then loaded into memory. The CPU begins executing the program's instructions. At each step, the process checks if input/output is needed. If yes, it waits for the I/O operation to complete before continuing. The process also checks if the program has finished running. If not, it continues executing instructions. When the program finishes, the process terminates and the flow ends.

This models how an operating system manages running programs by loading, executing, waiting for I/O, and terminating processes.

Variations - 2 Challenges

[intermediate] Draw a flowchart for process management including handling an error during execution that causes the process to terminate early.

[advanced] Draw a detailed flowchart showing process management with multiple I/O waits and a loop for repeated user inputs until the user chooses to exit.

Practice

1. What is a process in computing?

easy

A. A user account on the computer

B. A program that is currently running on a computer

C. A type of computer hardware

D. A file stored on the hard drive

Solution

1. Step 1: Understand the term 'process'

   A process is an instance of a program that is executing or running on a computer.

2. Step 2: Differentiate from other options

   Files, hardware, and user accounts are not running programs, so they are not processes.

3. Final Answer:

   A program that is currently running on a computer -> Option B

4. Quick Check:

   Process = Running program [OK]

Hint: Process means a running program, not a file or hardware [OK]

Common Mistakes:

• Confusing process with a file
• Thinking process is hardware
• Mixing process with user account

2. Which of the following commands correctly starts a program named app.exe on a Windows system?

easy

A. start app.exe

B. run app.exe

C. execute app.exe

D. launch app.exe

Solution

1. Step 1: Identify the correct Windows command

   On Windows, the command to start a program from the command line is start.

2. Step 2: Check other options

   Commands like run, execute, and launch are not valid Windows commands to start programs.

3. Final Answer:

   start app.exe -> Option A

4. Quick Check:

   Windows uses 'start' to run programs [OK]

Hint: Windows command to run programs is 'start' [OK]

Common Mistakes:

• Using 'run' instead of 'start'
• Confusing with Linux commands
• Assuming 'launch' is a command

3. Consider this flowchart for running a program:

What is the correct order of steps when a computer runs a program?

medium

A. Start -> Load program -> Execute program -> End

B. Execute program -> Load program -> Start -> End

C. Load program -> Start -> Execute program -> End

D. Start -> Execute program -> Load program -> End

Solution

1. Step 1: Analyze the flowchart steps

   The flowchart shows the process begins with 'Start', then 'Load program', followed by 'Execute program', and finally 'End'.

2. Step 2: Match the correct sequence

   Start -> Load program -> Execute program -> End matches the exact order shown in the flowchart.

3. Final Answer:

   Start -> Load program -> Execute program -> End -> Option A

4. Quick Check:

   Program runs: Start, Load, Execute, End [OK]

Hint: Follow flowchart arrows from start to end [OK]

Common Mistakes:

• Mixing order of loading and executing
• Starting execution before loading
• Ignoring the start and end steps

4. A user tries to run a program but gets an error: 'Process not found'. What is the most likely cause?

medium

A. The user has too many programs open

B. The computer hardware is broken

C. The program file does not exist or path is wrong

D. The program is already running

Solution

1. Step 1: Understand the error message

   'Process not found' means the system cannot locate the program to start it.

2. Step 2: Identify the cause

   This usually happens if the program file is missing or the path to it is incorrect.

3. Final Answer:

   The program file does not exist or path is wrong -> Option C

4. Quick Check:

   Missing file or wrong path causes 'Process not found' [OK]

Hint: Check file existence and path if process not found error occurs [OK]

Common Mistakes:

• Assuming hardware failure causes this error
• Thinking too many programs cause 'process not found'
• Believing program already running causes this error

5. You want to run two programs at the same time on your computer. Which process management feature allows this?

hard

A. Data encryption

B. File compression

C. Disk defragmentation

D. Multitasking

Solution

1. Step 1: Understand running multiple programs

   Running two programs simultaneously requires the computer to manage multiple processes at once.

2. Step 2: Identify the feature

   This feature is called multitasking, which allows the operating system to switch between processes quickly.

3. Final Answer:

   Multitasking -> Option D

4. Quick Check:

   Multitasking = Running multiple programs simultaneously [OK]

Hint: Multitasking lets you run many programs at once [OK]

Common Mistakes:

• Confusing multitasking with file compression
• Thinking disk defragmentation runs programs
• Mixing data encryption with process management