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Process vs Program

Introduction

Operating Systems में सबसे सामान्य और tricky concepts में से एक है Program और Process के बीच का अंतर समझना। Competitive exams में इस concept को अक्सर test किया जाता है क्योंकि दोनों terms सुनने में समान लगते हैं लेकिन इनके meaning बहुत अलग होते हैं।

ये questions आमतौर पर simple one-liners होते हैं, लेकिन अगर core idea clear न हो तो learners आसानी से confuse हो सकते हैं।

Pattern: Process vs Program

Pattern

Program instructions का एक passive set होता है जो disk पर stored रहता है, जबकि Process वही program होता है जो इस समय execution में होता है।

Step-by-Step Example

Question

निम्न में से कौन सा statement program और process के बीच सही अंतर बताता है?

Options:
A. Program active होता है, Process passive होता है
B. Program disk पर stored होता है, Process execution में होता है
C. Program को CPU की जरूरत होती है, Process को नहीं
D. Program temporary होता है, Process permanent होता है

Solution

  1. Step 1: Basic definitions याद करें

    Program instructions का एक set होता है जो किसी task को perform करने के लिए लिखा जाता है, जबकि process उन्हीं instructions का execution होता है।

  2. Step 2: Active और passive state पहचानें

    Program disk पर stored रहता है और खुद से कुछ नहीं करता, जबकि process active होता है और CPU व memory resources का उपयोग करता है।

  3. Final Answer:

    Program disk पर stored होता है, Process execution में होता है → Option B

  4. Quick Check:

    एक ही program को multiple times execute करने पर multiple processes बन सकते हैं ✅

Quick Variations

1. Questions पूछ सकते हैं कि कौन सा active है और कौन सा passive।

2. कभी-कभी पूछा जाता है कि कौन CPU और memory consume करता है।

3. Program और process की characteristics पर match-the-following questions आम होते हैं।

Trick to Always Use

  • Step 1 → अगर सिर्फ लिखा हुआ code है, तो Program सोचें।
  • Step 2 → अगर running है और resources use कर रहा है, तो Process सोचें।

Summary

Summary

  • Program instructions का एक passive set होता है जो disk पर stored रहता है।
  • Process program का active instance होता है जो execution में होता है।
  • एक ही program से multiple processes create हो सकते हैं।
  • यह एक simple लेकिन frequently asked conceptual exam pattern है।

Practice

(1/5)
1. Which of the following best defines a program in an operating system?
easy
A. A set of instructions stored on disk
B. A task currently using CPU
C. A running application in memory
D. An active execution unit

Solution

  1. Step 1: Recall the definition of a program

    A program is written code that exists before execution.

  2. Step 2: Identify the passive state

    It is stored on disk and does not use CPU until executed.

  3. Final Answer:

    A set of instructions stored on disk → Option A

  4. Quick Check:

    Without execution, a program remains inactive ✅
Hint: Stored code without execution = Program.
Common Mistakes: Treating a stored program as an active process.
2. Which term refers to a program that is currently being executed by the CPU?
easy
A. Program file
B. Process
C. Instruction set
D. Source code

Solution

  1. Step 1: Focus on execution state

    The question highlights a program that is running.

  2. Step 2: Match with correct term

    A running instance of a program is called a process.

  3. Final Answer:

    Process → Option B

  4. Quick Check:

    Execution + CPU usage always indicates a process ✅
Hint: Running program = Process.
Common Mistakes: Confusing source code with a running process.
3. Which of the following correctly describes the nature of a process?
easy
A. Permanent and passive
B. Stored and inactive
C. Active and consuming system resources
D. Written once and never changes

Solution

  1. Step 1: Identify process characteristics

    A process exists only during execution.

  2. Step 2: Check resource usage

    It actively uses CPU, memory, and other resources.

  3. Final Answer:

    Active and consuming system resources → Option C

  4. Quick Check:

    Only active tasks consume resources → process confirmed ✅
Hint: If it uses CPU and memory, it is a process.
Common Mistakes: Assuming a process is permanent like a program.
4. Which statement is TRUE regarding programs and processes?
medium
A. A program cannot create more than one process
B. A process exists even without a program
C. A program uses CPU directly
D. Multiple processes can be created from the same program

Solution

  1. Step 1: Recall execution behavior

    Each time a program runs, it creates a process.

  2. Step 2: Consider repeated execution

    Running the same program multiple times creates multiple processes.

  3. Final Answer:

    Multiple processes can be created from the same program → Option D

  4. Quick Check:

    Opening the same app twice creates two processes ✅
Hint: One program can generate many processes.
Common Mistakes: Thinking one program equals only one process.
5. Which of the following is NOT a difference between a program and a process?
medium
A. Program is passive, process is active
B. Program is stored on disk, process is in memory
C. Program does not require CPU, process requires CPU
D. Program executes instructions while process stores them

Solution

  1. Step 1: Recall core definitions

    A program is a passive set of instructions, while a process is an active execution of those instructions.

  2. Step 2: Evaluate each option

    Options A, B, and C correctly describe real differences between a program and a process.

  3. Step 3: Identify the incorrect statement

    Option D is incorrect because a program stores instructions, whereas a process executes them-not the other way around.

  4. Final Answer:

    Program executes instructions while process stores them → Option D

  5. Quick Check:

    Execution is always performed by a process, not by a program ✅
Hint: If execution and storage roles are reversed, the statement is incorrect.
Common Mistakes: Mixing up which entity executes instructions and which one stores them.

Mock Test

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