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Understanding Bugs and Errors in Programming

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Questions and Answers

What indicates a bug in a program?

The program crashes completely.
An unexpected behavior occurs without stopping execution. (correct)
The program fails to compile due to wrong syntax.
The program runs but returns incorrect results.

Which of the following best describes a syntax error?

It prevents a program from executing due to a logical flaw.
It occurs when trying to use an undeclared variable.
It arises when the code is incorrectly formatted or written. (correct)
It happens due to erroneous data types in an operation.

When a type error occurs, what is typically involved?

Performing array operations on an object.
Using a string method on a number. (correct)
Appending an integer to another integer.
Adding a string to a boolean value.

Which statement accurately differentiates between a bug and an error?

<p>A bug allows the program to run, whereas an error stops execution. (D)</p> Signup and view all the answers

What is a common cause of a reference error?

<p>Attempting to invoke a method on an undefined variable. (B)</p> Signup and view all the answers

Flashcards

What is a bug?

A program that acts unexpectedly but still runs.

What is an error?

An error stops a program from running.

Syntax error

A syntax error occurs when code is written incorrectly.

Type error

A type error happens when you use incompatible data types in an operation.

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Example of a bug

Concatenating a string and a number instead of adding them.

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Study Notes

Bugs vs. Errors

Bugs cause unexpected program behavior, but the program continues running
Errors halt program execution
Example bug: concatenating a string and a number instead of adding them
Example error: a reference error from using an undeclared variable

Error Types

Syntax Errors: Occur when the code is written incorrectly
Example: missing quotation marks in a string declaration
Type Errors: Happen when an operation is performed on an incompatible data type
Example: using an array method on a number

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