Explore Courses
Liverpool Business SchoolLiverpool Business SchoolMBA by Liverpool Business School
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA (Master of Business Administration)
  • 15 Months
Popular
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Business Administration (MBA)
  • 12 Months
New
Birla Institute of Management Technology Birla Institute of Management Technology Post Graduate Diploma in Management (BIMTECH)
  • 24 Months
Liverpool John Moores UniversityLiverpool John Moores UniversityMS in Data Science
  • 18 Months
Popular
IIIT BangaloreIIIT BangalorePost Graduate Programme in Data Science & AI (Executive)
  • 12 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with concentration in Generative AI
  • 3 Years
upGradupGradData Science Bootcamp with AI
  • 6 Months
New
University of MarylandIIIT BangalorePost Graduate Certificate in Data Science & AI (Executive)
  • 8-8.5 Months
upGradupGradData Science Bootcamp with AI
  • 6 months
Popular
upGrad KnowledgeHutupGrad KnowledgeHutData Engineer Bootcamp
  • Self-Paced
upGradupGradCertificate Course in Business Analytics & Consulting in association with PwC India
  • 06 Months
OP Jindal Global UniversityOP Jindal Global UniversityMaster of Design in User Experience Design
  • 12 Months
Popular
WoolfWoolfMaster of Science in Computer Science
  • 18 Months
New
Jindal Global UniversityJindal Global UniversityMaster of Design in User Experience
  • 12 Months
New
Rushford, GenevaRushford Business SchoolDBA Doctorate in Technology (Computer Science)
  • 36 Months
IIIT BangaloreIIIT BangaloreCloud Computing and DevOps Program (Executive)
  • 8 Months
New
upGrad KnowledgeHutupGrad KnowledgeHutAWS Solutions Architect Certification
  • 32 Hours
upGradupGradFull Stack Software Development Bootcamp
  • 6 Months
Popular
upGradupGradUI/UX Bootcamp
  • 3 Months
upGradupGradCloud Computing Bootcamp
  • 7.5 Months
Golden Gate University Golden Gate University Doctor of Business Administration in Digital Leadership
  • 36 Months
New
Jindal Global UniversityJindal Global UniversityMaster of Design in User Experience
  • 12 Months
New
Golden Gate University Golden Gate University Doctor of Business Administration (DBA)
  • 36 Months
Bestseller
Ecole Supérieure de Gestion et Commerce International ParisEcole Supérieure de Gestion et Commerce International ParisDoctorate of Business Administration (DBA)
  • 36 Months
Rushford, GenevaRushford Business SchoolDoctorate of Business Administration (DBA)
  • 36 Months
KnowledgeHut upGradKnowledgeHut upGradSAFe® 6.0 Certified ScrumMaster (SSM) Training
  • Self-Paced
KnowledgeHut upGradKnowledgeHut upGradPMP® certification
  • Self-Paced
IIM KozhikodeIIM KozhikodeProfessional Certification in HR Management and Analytics
  • 6 Months
Bestseller
Duke CEDuke CEPost Graduate Certificate in Product Management
  • 4-8 Months
Bestseller
upGrad KnowledgeHutupGrad KnowledgeHutLeading SAFe® 6.0 Certification
  • 16 Hours
Popular
upGrad KnowledgeHutupGrad KnowledgeHutCertified ScrumMaster®(CSM) Training
  • 16 Hours
Bestseller
PwCupGrad CampusCertification Program in Financial Modelling & Analysis in association with PwC India
  • 4 Months
upGrad KnowledgeHutupGrad KnowledgeHutSAFe® 6.0 POPM Certification
  • 16 Hours
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Science in Artificial Intelligence and Data Science
  • 12 Months
Bestseller
Liverpool John Moores University Liverpool John Moores University MS in Machine Learning & AI
  • 18 Months
Popular
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with concentration in Generative AI
  • 3 Years
IIIT BangaloreIIIT BangaloreExecutive Post Graduate Programme in Machine Learning & AI
  • 13 Months
Bestseller
IIITBIIITBExecutive Program in Generative AI for Leaders
  • 4 Months
upGradupGradAdvanced Certificate Program in GenerativeAI
  • 4 Months
New
IIIT BangaloreIIIT BangalorePost Graduate Certificate in Machine Learning & Deep Learning (Executive)
  • 8 Months
Bestseller
Jindal Global UniversityJindal Global UniversityMaster of Design in User Experience
  • 12 Months
New
Liverpool Business SchoolLiverpool Business SchoolMBA with Marketing Concentration
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA with Marketing Concentration
  • 15 Months
Popular
MICAMICAAdvanced Certificate in Digital Marketing and Communication
  • 6 Months
Bestseller
MICAMICAAdvanced Certificate in Brand Communication Management
  • 5 Months
Popular
upGradupGradDigital Marketing Accelerator Program
  • 05 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Corporate & Financial Law
  • 12 Months
Bestseller
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in AI and Emerging Technologies (Blended Learning Program)
  • 12 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Intellectual Property & Technology Law
  • 12 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Dispute Resolution
  • 12 Months
upGradupGradContract Law Certificate Program
  • Self paced
New
ESGCI, ParisESGCI, ParisDoctorate of Business Administration (DBA) from ESGCI, Paris
  • 36 Months
Golden Gate University Golden Gate University Doctor of Business Administration From Golden Gate University, San Francisco
  • 36 Months
Rushford Business SchoolRushford Business SchoolDoctor of Business Administration from Rushford Business School, Switzerland)
  • 36 Months
Edgewood CollegeEdgewood CollegeDoctorate of Business Administration from Edgewood College
  • 24 Months
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with Concentration in Generative AI
  • 36 Months
Golden Gate University Golden Gate University DBA in Digital Leadership from Golden Gate University, San Francisco
  • 36 Months
Liverpool Business SchoolLiverpool Business SchoolMBA by Liverpool Business School
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA (Master of Business Administration)
  • 15 Months
Popular
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Business Administration (MBA)
  • 12 Months
New
Deakin Business School and Institute of Management Technology, GhaziabadDeakin Business School and IMT, GhaziabadMBA (Master of Business Administration)
  • 12 Months
Liverpool John Moores UniversityLiverpool John Moores UniversityMS in Data Science
  • 18 Months
Bestseller
O.P.Jindal Global UniversityO.P.Jindal Global UniversityMaster of Science in Artificial Intelligence and Data Science
  • 12 Months
Bestseller
IIIT BangaloreIIIT BangalorePost Graduate Programme in Data Science (Executive)
  • 12 Months
Bestseller
O.P.Jindal Global UniversityO.P.Jindal Global UniversityO.P.Jindal Global University
  • 12 Months
WoolfWoolfMaster of Science in Computer Science
  • 18 Months
New
Liverpool John Moores University Liverpool John Moores University MS in Machine Learning & AI
  • 18 Months
Popular
Golden Gate UniversityGolden Gate UniversityDBA in Emerging Technologies with concentration in Generative AI
  • 3 Years
Rushford, GenevaRushford Business SchoolDoctorate of Business Administration (AI/ML)
  • 36 Months
Ecole Supérieure de Gestion et Commerce International ParisEcole Supérieure de Gestion et Commerce International ParisDBA Specialisation in AI & ML
  • 36 Months
Golden Gate University Golden Gate University Doctor of Business Administration (DBA)
  • 36 Months
Bestseller
Ecole Supérieure de Gestion et Commerce International ParisEcole Supérieure de Gestion et Commerce International ParisDoctorate of Business Administration (DBA)
  • 36 Months
Rushford, GenevaRushford Business SchoolDoctorate of Business Administration (DBA)
  • 36 Months
Liverpool Business SchoolLiverpool Business SchoolMBA with Marketing Concentration
  • 18 Months
Bestseller
Golden Gate UniversityGolden Gate UniversityMBA with Marketing Concentration
  • 15 Months
Popular
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Corporate & Financial Law
  • 12 Months
Bestseller
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Intellectual Property & Technology Law
  • 12 Months
Jindal Global Law SchoolJindal Global Law SchoolLL.M. in Dispute Resolution
  • 12 Months
IIITBIIITBExecutive Program in Generative AI for Leaders
  • 4 Months
New
IIIT BangaloreIIIT BangaloreExecutive Post Graduate Programme in Machine Learning & AI
  • 13 Months
Bestseller
upGradupGradData Science Bootcamp with AI
  • 6 Months
New
upGradupGradAdvanced Certificate Program in GenerativeAI
  • 4 Months
New
KnowledgeHut upGradKnowledgeHut upGradSAFe® 6.0 Certified ScrumMaster (SSM) Training
  • Self-Paced
upGrad KnowledgeHutupGrad KnowledgeHutCertified ScrumMaster®(CSM) Training
  • 16 Hours
upGrad KnowledgeHutupGrad KnowledgeHutLeading SAFe® 6.0 Certification
  • 16 Hours
KnowledgeHut upGradKnowledgeHut upGradPMP® certification
  • Self-Paced
upGrad KnowledgeHutupGrad KnowledgeHutAWS Solutions Architect Certification
  • 32 Hours
upGrad KnowledgeHutupGrad KnowledgeHutAzure Administrator Certification (AZ-104)
  • 24 Hours
KnowledgeHut upGradKnowledgeHut upGradAWS Cloud Practioner Essentials Certification
  • 1 Week
KnowledgeHut upGradKnowledgeHut upGradAzure Data Engineering Training (DP-203)
  • 1 Week
MICAMICAAdvanced Certificate in Digital Marketing and Communication
  • 6 Months
Bestseller
MICAMICAAdvanced Certificate in Brand Communication Management
  • 5 Months
Popular
IIM KozhikodeIIM KozhikodeProfessional Certification in HR Management and Analytics
  • 6 Months
Bestseller
Duke CEDuke CEPost Graduate Certificate in Product Management
  • 4-8 Months
Bestseller
Loyola Institute of Business Administration (LIBA)Loyola Institute of Business Administration (LIBA)Executive PG Programme in Human Resource Management
  • 11 Months
Popular
Goa Institute of ManagementGoa Institute of ManagementExecutive PG Program in Healthcare Management
  • 11 Months
IMT GhaziabadIMT GhaziabadAdvanced General Management Program
  • 11 Months
Golden Gate UniversityGolden Gate UniversityProfessional Certificate in Global Business Management
  • 6-8 Months
upGradupGradContract Law Certificate Program
  • Self paced
New
IU, GermanyIU, GermanyMaster of Business Administration (90 ECTS)
  • 18 Months
Bestseller
IU, GermanyIU, GermanyMaster in International Management (120 ECTS)
  • 24 Months
Popular
IU, GermanyIU, GermanyB.Sc. Computer Science (180 ECTS)
  • 36 Months
Clark UniversityClark UniversityMaster of Business Administration
  • 23 Months
New
Golden Gate UniversityGolden Gate UniversityMaster of Business Administration
  • 20 Months
Clark University, USClark University, USMS in Project Management
  • 20 Months
New
Edgewood CollegeEdgewood CollegeMaster of Business Administration
  • 23 Months
The American Business SchoolThe American Business SchoolMBA with specialization
  • 23 Months
New
Aivancity ParisAivancity ParisMSc Artificial Intelligence Engineering
  • 24 Months
Aivancity ParisAivancity ParisMSc Data Engineering
  • 24 Months
The American Business SchoolThe American Business SchoolMBA with specialization
  • 23 Months
New
Aivancity ParisAivancity ParisMSc Artificial Intelligence Engineering
  • 24 Months
Aivancity ParisAivancity ParisMSc Data Engineering
  • 24 Months
upGradupGradData Science Bootcamp with AI
  • 6 Months
Popular
upGrad KnowledgeHutupGrad KnowledgeHutData Engineer Bootcamp
  • Self-Paced
upGradupGradFull Stack Software Development Bootcamp
  • 6 Months
Bestseller
KnowledgeHut upGradKnowledgeHut upGradBackend Development Bootcamp
  • Self-Paced
upGradupGradUI/UX Bootcamp
  • 3 Months
upGradupGradCloud Computing Bootcamp
  • 7.5 Months
PwCupGrad CampusCertification Program in Financial Modelling & Analysis in association with PwC India
  • 5 Months
upGrad KnowledgeHutupGrad KnowledgeHutSAFe® 6.0 POPM Certification
  • 16 Hours
upGradupGradDigital Marketing Accelerator Program
  • 05 Months
upGradupGradAdvanced Certificate Program in GenerativeAI
  • 4 Months
New
upGradupGradData Science Bootcamp with AI
  • 6 Months
Popular
upGradupGradFull Stack Software Development Bootcamp
  • 6 Months
Bestseller
upGradupGradUI/UX Bootcamp
  • 3 Months
PwCupGrad CampusCertification Program in Financial Modelling & Analysis in association with PwC India
  • 4 Months
upGradupGradCertificate Course in Business Analytics & Consulting in association with PwC India
  • 06 Months
upGradupGradDigital Marketing Accelerator Program
  • 05 Months

DFS vs BFS: Difference Between DFS and BFS

Updated on 11 October, 2023

1.67K+ views
9 min read

What is BFS?

BFS, or Breadth-First Search, is a widely used algorithm in computer science and graph theory. It explores data structures systematically and efficiently by visiting neighboring vertices in a breadth-first manner, ensuring all nodes at the same distance from the source are visited before going deeper.

BFS guarantees the shortest path in an unweighted graph, but may not be the most efficient for complex scenarios or large datasets. Implemented using a queue data structure, BFS is a fundamental tool for exploring and analyzing graph-like structures in various computer science domains. 

Example of BFS

Let’s consider a different example to illustrate how BFS works. Here’s a visual representation of the graph:

Suppose we want to find the shortest path between person A and person F using BFS. We start the BFS algorithm from node A:

  • Start at A (source vertex).
  • Visit all immediate neighbors of A (B and C).
  • Add B and C to the queue to explore their neighbors later.
  • Queue: [B, C]
  • Take the next vertex from the queue (B).
  • Visit all immediate neighbors of B (A, D, and E).
  • Add D and E to the queue since they haven’t been visited yet.
  • Queue: [C, D, E]
  • Take the next vertex from the queue (C).
  • Visit all immediate neighbors of C (A and D).
  • A has already been visited, so we skipped it.
  • Queue: [D, E]
  • Take the next vertex from the queue (D).
  • Visit all immediate neighbors of D (B and C).
  • Both B and C have already been visited, so we skipped them.
  • Queue: [E]
  • Take the next vertex from the queue (E).
  • Visit all immediate neighbors of E (B and F).
  • Queue: [F]
  • Take the next vertex from the queue (F).
  • F is the destination vertex we were looking for, so the BFS ends.
  • The shortest path from A to F is: A -> B -> E -> F

In this example, BFS explored the graph layer by layer, ensuring that the shortest path between A and F was found. This property of BFS makes it particularly useful in applications like network routing and most straightforward path problems.

Learn more about this via MS in Full Stack AI and ML

What is DFS?

DFS, or Depth-First Search, is an algorithm that explores graphs by moving deeply into a branch before backtracking to explore other branches. It uses a stack to track vertices and efficiently visits reachable vertices from a source.

While useful for certain graph-related problems like cycle detection and maze exploration, DFS does not guarantee to find the shortest path between nodes, as it may explore farther branches first. Nonetheless, DFS remains a crucial tool in computer science for various challenges involving graph-like structures.

 Check out upGrad’s free courses on AI.

Example of DFS

Let’s use DFS to traverse and explore the following undirected graph starting from the source vertex ‘A’:

DFS works as follows:

  • Start at vertex ‘A’:

(Note: The asterisk ‘*’ denotes the current vertex being explored.)

  • Visit an unvisited neighbor of ‘A,’ such as ‘B’:
  • Visit an unvisited neighbor of ‘B,’ such as ‘E’:
  • Visit an unvisited neighbor of ‘E.’ However, all neighbors of ‘E’ have already been visited, so backtrack:
  • Backtrack to vertex ‘D’ and visit its unvisited neighbor, ‘C’:
  • Since ‘C’ has no unvisited neighbors, backtrack again to vertex ‘D’:
  • Now visit the last unvisited neighbor of ‘D,’ which is ‘F’:
  • ‘F’ has no unvisited neighbors, and the stack is now empty, so the DFS process ends.
  • The order of exploration in DFS is: A -> B -> E -> D -> C -> F

DFS explores as far as possible along each branch before backtracking, making it a useful algorithm for graph-related problems such as finding connected components, detecting cycles, and solving puzzles or maze exploration.

Enroll for the Machine Learning Course from the World’s top Universities. Earn Masters, Executive PGP, or Advanced Certificate Programs to fast-track your career.

What is DRAM

DRAM stands for Dynamic Random-Access Memory, a common type of computer memory used for fast data access. It stores data and instructions needed by the processor. Unlike static RAM, DRAM is dynamic and requires periodic refreshing to maintain stored data. It offers cost-effective, high-capacity memory, making it suitable for computers’ main memory (RAM). 

DRAM’s random-access nature enables quick data retrieval and modification, supporting smooth computing experiences. However, it consumes more power than SRAM and has slightly slower access times than cache memory. Overall, DRAM is critical in ensuring efficient data processing in modern computing devices. With its ability to provide cost-effective, high-capacity memory, DRAM remains a crucial component in the seamless performance of various computing tasks, from running applications to multitasking on personal computers and other electronic devices.

BFS vs DFS: Difference between DFS and BFS.

Discover the power of graph traversal with BFS vs DFS in AI! Here’s a table highlighting the main difference between DFS and BFS in Artificial Intelligence:

Aspect Depth-First Search (DFS) Breadth-First Search (BFS)
Approach Explores as deep as possible before backtracking. Explores all immediate neighbors before moving to deeper levels.
Data Structure Used Utilizes a stack data structure for tracking nodes. Uses a queue data structure for tracking nodes.
Implementation Can be implemented using recursion or an explicit stack. Implemented using a queue for efficient node tracking.
Memory Usage Requires less memory as it traverses one branch at a time. Requires more memory to maintain the queue for all neighbors.
Completeness May not find the shortest path between two nodes. Guarantees finding the shortest path between two nodes.
Use Cases Suitable for exploring deep paths and backtracking scenarios. Effective for finding the shortest path and connectivity analysis.
Applications Solving puzzles, maze exploration, detecting cycles, and connectivity checks. Shortest path finding, network routing, web crawling, and level-order tree traversal.

DFS and BFS are two common graph traversal algorithms, each with its strengths and weaknesses. The choice between them depends on the specific problem and the desired outcomes regarding pathfinding and exploration strategies. Both BFS and DFS in data structure are essential graph traversal techniques that help explore and analyze different types of data structures in computer science and artificial intelligence.

BFS and DFS Algorithm in Data Structure

Breadth First Search and Depth First Search are fundamental graph traversal algorithms used in data structures to explore and analyze graphs or tree-like structures.

BFS starts from a designated source node and explores all immediate neighbors before moving to their neighbors. It utilizes a queue data structure to keep track of nodes to be visited, ensuring a level-by-level exploration. BFS guarantees finding the shortest path between the source and any reachable node, making it suitable for finding connected components, web crawling, and shortest path problems.

On the other hand, DFS explores as deep as possible along a branch before backtracking and exploring other branches. It employs a stack (recursion or explicit stack) to keep track of nodes to be explored. DFS is efficient for tasks involving exploring deep paths, backtracking, and finding graph cycles.

Both algorithms have specific applications and benefits, and the choice between BFS and DFS depends on the specific problem and the desired characteristics of the exploration process. Unlock the world of creativity and innovation with the Advanced Certificate Program in GenerativeAI. This program will equip you with cutting-edge skills to explore the fascinating realm of Generative AI and unleash your potential as an AI innovator.

Conclusion

The main difference between Depth-First Search (DFS) and Breadth-First Search (BFS) lies in their exploration strategies. DFS explores as deep as possible along a branch before backtracking, utilizing a stack data structure (either through recursion or an explicit stack). It is efficient for tasks involving deep path exploration, backtracking, and detecting cycles in graphs.

On the other hand, BFS explores all immediate neighbors before moving to deeper levels, using a queue data structure. It guarantees finding the shortest path between the source and any reachable node, making it suitable for finding connected components and shortest path problems.

The choice between DFS and BFS depends on the specific problem and the desired exploration characteristics. DFS is beneficial for tasks involving deep exploration and backtracking, while BFS is effective for finding the shortest paths and analyzing connectivity in graphs. Start your transformative journey with the Executive PG Program in Data Science & Machine Learning from the University of Maryland.

Frequently Asked Questions (FAQs)

1. How do DFS and BFS algorithms differ in their traversal strategies?

In DFS, the algorithm explores as far as possible along a branch before backtracking to explore other branches, while in BFS, it systematically explores all immediate neighbors at the current level before moving on to deeper levels. The key difference lies in the order of exploration, making each algorithm suitable for different scenarios and applications.

2. In AI, when would you prefer to use BFS over DFS, and vice versa?

Use BFS to find the shortest path between two nodes or explore all immediate neighbors in a systematic order. Use DFS for tasks involving deep exploration, like backtracking and solving puzzles.

3. In terms of space complexity, which algorithm, DFS or BFS, is more efficient?

DFS typically requires less memory as it traverses one branch at a time, making it more space-efficient than BFS, which requires more memory to maintain the queue for all neighbors. DFS typically requires less memory as it traverses one branch at a time, making it more space-efficient than BFS, which requires more memory to maintain the queue for all neighbors.