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Data Storage Flashcards

Possible Data Storage Interview questions (43 cards)

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1
Q

What is data storage?

A

The process of saving data in digital form so it can be accessed and used later.

Data storage is essential for preserving information for future use.

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2
Q

Why is data storage important?

A
  • Preserves data
  • Allows retrieval
  • Enables sharing
  • Protects from loss

Effective data storage is crucial for data management and security.

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3
Q

What types of data storage do you know?

A
  • Primary storage
  • Secondary storage

These categories help in understanding how data is managed and accessed.

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4
Q

What is primary storage?

A

Temporary memory used by the computer during processing, such as RAM.

Primary storage is fast but volatile.

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5
Q

What is secondary storage?

A

Permanent storage used to save data long-term, such as hard disks and SSDs.

Secondary storage retains data even when the power is off.

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6
Q

Give examples of storage devices.

A
  • Hard disk
  • SSD
  • USB flash drive
  • Memory card
  • CD/DVD
  • Cloud storage

These devices vary in capacity and speed.

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7
Q

Difference between data storage and memory?

A

Memory (RAM) is temporary and fast, while storage is permanent and slower.

Understanding this difference is key in computer architecture.

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8
Q

What is data redundancy in storage systems?

A

The duplication of the same data in multiple locations.

Data redundancy can lead to inefficiencies and increased storage costs.

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9
Q

What is data backup?

A

A copy of data stored separately to recover it in case of loss.

Regular backups are essential for data recovery.

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10
Q

Why is data security important in data storage?

A

To protect data from unauthorized access, theft, or damage.

Data security measures are vital for maintaining confidentiality and integrity.

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11
Q

What is data loss?

A

The destruction or disappearance of data due to system failure, human error, or attacks.

Data loss can have severe consequences for individuals and organizations.

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12
Q

How is data stored in a computer system?

A

Data is stored in binary form (0s and 1s) on storage devices.

This binary representation is fundamental to all digital data processing.

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13
Q

What file systems are you familiar with?

A
  • FAT32
  • NTFS
  • ext4

Different file systems have unique features and limitations.

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14
Q

What is cloud storage?

A

Online storage where data is saved on remote servers accessed via the internet.

Cloud storage offers flexibility and scalability.

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15
Q

Advantages of cloud storage?

A
  • Easy access
  • Scalability
  • Backup
  • Cost efficiency

These benefits make cloud storage a popular choice for many users.

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16
Q

Disadvantages of cloud storage?

A
  • Internet dependency
  • Security concerns
  • Subscription costs

Users must weigh these disadvantages against the benefits.

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17
Q

What is RAID and why is it used?

A

A storage technique that combines multiple disks to improve performance and data reliability.

RAID configurations can enhance data protection and speed.

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18
Q

How is data stored in a database?

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A

Data is stored in tables with rows and columns.

This structure allows for efficient data management and retrieval.

19
Q

Problems due to poor data storage design?

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A
  • Data redundancy
  • Inconsistency
  • Slow performance
  • Data loss

Proper design is crucial for effective data management.

20
Q

How do you prevent data duplication?

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A

By using proper database design and normalization.

Normalization helps maintain data integrity.

21
Q

What is data normalization?

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A

The process of organizing data to reduce redundancy and improve integrity.

Normalization is a key concept in database design.

22
Q

How is data accessed and retrieved?

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A

Using queries, search commands, or database management systems.

Efficient access methods are essential for user satisfaction.

23
Q

How do you protect stored data?

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A
  • Using passwords
  • Encryption
  • Access control
  • Backups

These measures help safeguard data against threats.

24
Q

What is encryption?

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A

Converts data into an unreadable form to protect it from unauthorized users.

Encryption is a fundamental aspect of data security.

25
What is **access control**?
It restricts who can view or modify data. ## Footnote Access control mechanisms are vital for maintaining data privacy.
26
How do you ensure **data integrity**?
* Using validation rules * Backups * Error-checking methods ## Footnote Data integrity is crucial for reliable information.
27
What is **disaster recovery**?
The process of restoring data after system failure or disaster. ## Footnote A solid disaster recovery plan is essential for business continuity.
28
Storage solution for a **small business**?
Cloud storage combined with local backups. ## Footnote This approach balances accessibility and security.
29
How would you handle a **data storage failure**?
Restore data from backups and fix or replace the faulty system. ## Footnote Quick response is key to minimizing data loss.
30
Challenges faced with **data storage**?
* Limited space * Security threats * Data management issues ## Footnote Addressing these challenges is crucial for effective data handling.
31
How do you ensure **data availability**?
* Using backups * Redundancy * Reliable storage systems ## Footnote Ensuring availability is critical for operational efficiency.
32
Suggested improvements in **data storage systems**?
* Better security * Faster access * Efficient data management ## Footnote Continuous improvement is necessary to keep up with evolving needs.
33
Future trends in **data storage technology**?
* Cloud computing * AI-based storage management * Increased use of SSDs ## Footnote These trends indicate the direction of technological advancements in storage.
34
What is a **data store**?
A repository for long-term storage to hold an organization's data ## Footnote Examples include databases that can be searched and queried to find data.
35
After filling a data store with data, it becomes an **archive** that can be used to __________.
search and query to find data ## Footnote This helps decision makers identify trends and unearth hidden patterns.
36
What are some examples of questions that can be answered using a data store?
* Favorite products for each demographic * Which groups of products sell well together ## Footnote These insights are important for business decision-making.
37
True or false: **Data stores** are a new concept.
FALSE ## Footnote Traditional examples include paper-based catalogs in libraries and museums.
38
What advantages do **computerized data stores** have over traditional paper-based ones?
* Faster data retrieval * Easier data management * Ability to handle large volumes of data ## Footnote Modern organizations have switched to computer-based data stores for these benefits.
39
What is a **database management system** (DBMS)?
Software that manages the storage of data to disk and rapid retrieval of that data ## Footnote A DBMS provides security, reliability, and better performance than file-based data stores.
40
What does the term **server** refer to in the context of a DBMS?
A program that runs continually and provides a service by processing requests ## Footnote Clients are people and applications that request services from the server.
41
What is the computer that holds the **DBMS** often referred to as?
Database server ## Footnote Clients connect to the database server from other computers over the network.
42
The structure built to hold valuable data is known as a __________.
database ## Footnote The DBMS is the tool used to build that structure and operate on the data.
43
There are many different specific **DBMS programs** to choose from, varying from different __________ and versions.
vendors ## Footnote This variety allows organizations to select a DBMS that best fits their needs.
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