IB Computer Science Topic B2.1.3 How Programs Use Common Exception Handling Techniques Revision Notes (SL/HL) | RevisionDojo

Exception Handling in Programs

Why Exception Handling Is Needed

Programs may fail due to:
1. Unexpected inputs (e.g., dividing by zero, invalid user entry).
2. Resource unavailability (e.g., file not found, network failure).
3. Logic errors (e.g., null references, array index out of bounds).
Without exception handling, programs may crash abruptly.

Hint

Always predict where code could fail and handle it gracefully.

Common Mistake

Relying only on testing: unexpected errors can still occur at runtime.

Exception Handling Constructs

Try / Catch (Java)

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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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Exception Handling in Programs

Why Exception Handling Is Needed

Programs may fail due to:
1. Unexpected inputs (e.g., dividing by zero, invalid user entry).
2. Resource unavailability (e.g., file not found, network failure).
3. Logic errors (e.g., null references, array index out of bounds).
Without exception handling, programs may crash abruptly.

Hint

Always predict where code could fail and handle it gracefully.

Common Mistake

Relying only on testing: unexpected errors can still occur at runtime.

Exception Handling Constructs

Try / Catch (Java)

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.

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A1 Computer fundamentals4 subtopics

A2 Networks4 subtopics

A3 Databases4 subtopics

A4 Machine learning4 subtopics

B1 Computational thinking1 subtopic

B2 Programming5 subtopics

B3 Object-oriented programming2 subtopics

B4 Abstract data types (HL only)1 subtopic

IB Computer Science Topic B2.1.3: How Programs Use Common Exception Handling Techniques Notes

A1 Computer fundamentals4 subtopics

A2 Networks4 subtopics

A3 Databases4 subtopics

A4 Machine learning4 subtopics

B1 Computational thinking1 subtopic

B2 Programming5 subtopics

B3 Object-oriented programming2 subtopics

B4 Abstract data types (HL only)1 subtopic

Exception Handling in Programs

Why Exception Handling Is Needed

Exception Handling Constructs

Try / Catch (Java)

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

Exception Handling in Programs

Why Exception Handling Is Needed

Exception Handling Constructs

Try / Catch (Java)

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