IB Computer Science Topic 5.1.6 Arrays as Stacks and Queues Revision Notes (HL)

IB Computer Science Topic 5.1.6 Arrays as Stacks and Queues Revision Notes (HL) | RevisionDojo

Arrays as Stacks and Queues

Recall that stacks and queues are abstract data structures that define specific ways to store and access data.

Stacks follow a Last-In, First-Out (LIFO) order.
Queues follow a First-In, First-Out (FIFO) order.

Note

Stacks and queues can be implemented using arrays, which provide a fixed-size, efficient way to manage data.

Stacks

Initialise an array and a variable TOP to track the top element's index.
Push operation:
1. Check if the stack is not full.
2. Increment TOP.
3. Add the element to the ARRAY[TOP].
Pop operation:
1. Check if the stack is not empty.
2. Return ARRAY[TOP].
3. Decrement TOP.
isEmpty operation:

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Tip

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Arrays as Stacks and Queues

Recall that stacks and queues are abstract data structures that define specific ways to store and access data.

Stacks follow a Last-In, First-Out (LIFO) order.
Queues follow a First-In, First-Out (FIFO) order.

Note

Stacks and queues can be implemented using arrays, which provide a fixed-size, efficient way to manage data.

Stacks

Initialise an array and a variable TOP to track the top element's index.
Push operation:
1. Check if the stack is not full.
2. Increment TOP.
3. Add the element to the ARRAY[TOP].
Pop operation:
1. Check if the stack is not empty.
2. Return ARRAY[TOP].
3. Decrement TOP.
isEmpty operation:

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

IB Computer Science 5.1.6 Arrays as Stacks and Queues Notes

1. System fundamentals2 subtopics

2. Computer organization1 subtopic

3. Networks1 subtopic

4. Computational thinking, problem-solving and programming3 subtopics

5. Abstract data structures (HL)1 subtopic

6. Resource management (HL)1 subtopic

7. Control (HL)1 subtopic

A. Databases4 subtopics

B. Modelling and simulation4 subtopics

C. Web science6 subtopics

D. Object-oriented programming (OOP)4 subtopics

Arrays as Stacks and Queues

Stacks

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Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Arrays as Stacks and Queues

Stacks

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account