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Storage Devices & Capacity Units

Introduction

Storage devices का उपयोग data, programs, और information को future use के लिए store करने के लिए किया जाता है। Competitive exams में अक्सर candidates से storage devices के types और data measurement units जैसे KB, MB, GB, और TB पर questions पूछे जाते हैं।

ये questions practical, fact-based होते हैं और IBPS, SBI, और SSC exams में commonly पूछे जाते हैं।

Pattern: Storage Devices & Capacity Units

Pattern

मुख्य idea यह है कि storage devices को technology के आधार पर पहचाना जाए (magnetic, optical, solid-state) और KB, MB, GB, और TB जैसी data capacity units को सही तरीके से compare या convert किया जाए।

Step-by-Step Example

Question

निम्नलिखित में से कौन-सा option storage devices को data storage capacity के increasing order में सही तरीके से दर्शाता है?

Options:
A. CD < DVD < Blu-ray Disc
B. Blu-ray Disc < DVD < CD
C. DVD < CD < Blu-ray Disc
D. CD < Blu-ray Disc < DVD

Solution

  1. Step 1: Storage capacities याद करें

    CD में DVD से कम data store होता है, और DVD में Blu-ray Disc से कम data store होता है।

  2. Step 2: Increasing order में arrange करें

    सबसे कम capacity → CD, फिर DVD, और फिर Blu-ray Disc।

  3. Final Answer:

    CD < DVD < Blu-ray Disc → Option A

  4. Quick Check:

    CD (~700 MB) < DVD (~4.7 GB) < Blu-ray (~25 GB) ✅

Quick Variations

• HDD और SSD की speed और durability के आधार पर comparison।

• कभी-कभी unit conversion (MB से GB, GB से TB) पूछी जाती है।

• Options में optical, magnetic, और solid-state devices को mix किया जा सकता है।

Trick to Always Use

  • Step 1 → Optical discs capacity order: CD < DVD < Blu-ray
  • Step 2 → Unit ladder याद रखें: KB → MB → GB → TB
  • Step 3 → SSD, HDD से faster होती है लेकिन costlier होती है

Summary

Summary

  • Storage devices data को permanently future use के लिए store करते हैं।
  • Common storage devices में HDD, SSD, CD, DVD, और Blu-ray Disc शामिल हैं।
  • Data capacity KB से MB, फिर GB और TB तक बढ़ती है।
  • Capacity comparison वाले questions frequent और scoring होते हैं।

याद रखने के लिए example:
CD < DVD < Blu-ray | KB < MB < GB < TB

Practice

(1/5)
1. Which of the following is a solid-state storage device?
easy
A. SSD
B. Hard Disk
C. DVD
D. Blu-ray Disc

Solution

  1. Step 1: Recall storage technologies

    Solid-state storage uses flash memory and has no moving parts.

  2. Step 2: Evaluate options

    SSD uses flash memory, while Hard Disk is magnetic and DVD/Blu-ray are optical.

  3. Final Answer:

    SSD → Option A

  4. Quick Check:

    No moving parts + flash memory → SSD ✅
Hint: Flash memory without moving parts indicates SSD.
Common Mistakes: Confusing hard disk with solid-state storage.
2. Which unit of data storage is immediately larger than a Gigabyte (GB)?
easy
A. Megabyte (MB)
B. Terabyte (TB)
C. Kilobyte (KB)
D. Byte

Solution

  1. Step 1: Recall the unit hierarchy

    Data units increase in the order: KB → MB → GB → TB.

  2. Step 2: Identify the next larger unit

    After Gigabyte (GB), the next larger unit is Terabyte (TB).

  3. Final Answer:

    Terabyte (TB) → Option B

  4. Quick Check:

    GB followed by TB in the unit ladder ✅
Hint: Remember the ladder: KB-MB-GB-TB.
Common Mistakes: Choosing MB because of confusion in unit order.
3. Which of the following storage devices uses magnetic technology?
easy
A. Pen Drive
B. SSD
C. Hard Disk
D. DVD

Solution

  1. Step 1: Identify magnetic storage

    Magnetic storage devices store data using magnetic coating.

  2. Step 2: Check each option

    Hard Disk stores data on magnetic platters.

  3. Final Answer:

    Hard Disk → Option C

  4. Quick Check:

    Magnetic platters → Hard Disk ✅
Hint: Magnetic disks always indicate HDD.
Common Mistakes: Thinking SSD also uses magnetic storage.
4. Which of the following correctly converts 1 Terabyte (TB) into Gigabytes (GB)?
medium
A. 100 GB
B. 512 GB
C. 1000 GB
D. 1024 GB

Solution

  1. Step 1: Recall standard conversion

    In computer memory units, binary conversion is commonly used.

  2. Step 2: Apply conversion rule

    1 TB equals 1024 GB.

  3. Final Answer:

    1024 GB → Option D

  4. Quick Check:

    Each higher unit = 1024 of the lower unit ✅
Hint: Use 1024-based conversion for memory units.
Common Mistakes: Using decimal conversion instead of binary.
5. Which of the following storage devices is MOST suitable for fast data access and durability?
medium
A. SSD
B. CD
C. DVD
D. Magnetic Tape

Solution

  1. Step 1: Identify requirements

    Fast access and durability require modern storage with no moving parts.

  2. Step 2: Compare devices

    SSD offers high speed and durability compared to optical and tape storage.

  3. Final Answer:

    SSD → Option A

  4. Quick Check:

    No moving parts + high speed → SSD ✅
Hint: Fastest and durable storage → SSD.
Common Mistakes: Choosing optical media for speed.

Mock Test

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