Understanding Arrays, Linked Lists, and Essential Data Structures — PickAClass
⏱ 2h 54m 📚 29 lessons 🎧 Audio version

Understanding Arrays, Linked Lists, and Essential Data Structures

New programmers will build a solid foundation in organizing data efficiently using arrays, linked lists, and hash maps, analyzing performance trade-offs for different applications.

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About this course

Data is the core of every application, but how you store and retrieve it determines how fast your code runs. Start your programming journey by mastering the most fundamental building blocks of data organization. By the end of this course, you will be able to confidently select the appropriate data structure—whether it's a fixed array, a flexible linked list, or a high-speed hash map—to solve common programming challenges efficiently. You will understand how these structures work under the hood and how to implement them from scratch. What you'll learn: * Understand the core concepts of data storage, including memory allocation and dynamic resizing. * Master the implementation and manipulation of contiguous arrays and dynamic lists. * Implement singly and doubly linked lists, focusing on efficient insertion and deletion operations. * Analyze the time and space complexity of operations using Big O notation for various structures. * Configure and utilize key-value storage using foundational hash map and dictionary concepts. * Apply basic generic programming principles to ensure data structure implementations are type-safe. The course begins with defining basic terminology and performance metrics essential for efficient coding. We then move through the structure and mechanics of arrays, linked lists, and common dictionary implementations, concluding with practical application scenarios. This course is designed for absolute beginners in programming or those needing to solidify their understanding of foundational computer science concepts. No prior knowledge of data structures or algorithms is required. Start building your efficient programming toolkit today.

What you'll get

  • 📜 Certificate of completion
    Add it to your LinkedIn profile
  • 💬 Personal AI tutor
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  • 🎧 Audio version included
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  • ♾️ Lifetime access
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  • 📱 Phone or computer
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  • 💸 14-day refund
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  • Short & focused
    2h 54m of practical content

Certificate of completion

Every course you complete on PickAClass issues a credential like this — original, with its own code, verifiable by URL, and detailed about what was actually demonstrated.

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Certificate of Mastery
This certifies that
Name Surname
has successfully demonstrated mastery of
Understanding Arrays, Linked Lists, and Essential Data Structures
Skills demonstrated
Behavioral pattern analysis
Foundational
1.2 hrs
Decision-architecture frameworks
Proficient
1.4 hrs
A/B test design
Proficient
1.7 hrs
Behavioral copywriting
Advanced
1.9 hrs
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PickAClass — Name Surname
Understanding Arrays, Linked Lists, and Essential Data Structures
Page 2 of 2
Performance detail
Coursework summary
Lessons completed 14 / 14
Practice questions 26 / 28
Assignments submitted 4 (avg 4.5 / 5)
Capstone project Reviewed — 4.6 / 5
Total practice 6.2 hrs
Performance benchmark
Cohort rank Top 12% of 1,625
Time to completion 11 days (median: 22)
Mastery score 91 / 100
Practice-question score 94%
Skill verification Verified Skill Path
Verify this credential
pickaclass.com/certificates/PCC-2026-X4F7-AP19
Issued under the academic standards of PickAClass. Skill levels reflect assessed performance against the course's competency rubric. This is an original credential of this platform.

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Frequently asked

What do I need to take this course? +

Just a phone or computer with internet. No installs, no special hardware.

How do I pay? +

By card via Stripe. We don’t store card details — Stripe handles them securely.

Can I get a refund? +

Yes — full refund within 14 days, no questions asked.

How long will I have access? +

Forever. Once you purchase, the course is yours to revisit anytime.

Will I get a certificate? +

Yes. On completion you'll receive a certificate you can add to your LinkedIn profile.

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