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Questions and Answers
What does the expression scores[2*i + 1] represent in the context of accessing array elements?
What does the expression scores[2*i + 1] represent in the context of accessing array elements?
- It refers to a constant value stored in the array.
- It always returns the value at index 1.
- It returns the sum of the first two elements in the array.
- It returns the value at the index calculated by the expression for the given array. (correct)
Which statement is true regarding legal indices for an array declared to be size n?
Which statement is true regarding legal indices for an array declared to be size n?
- Indices can only be negative numbers.
- Indices can be from 0 to n-1. (correct)
- Any integer value can be used as an index.
- Only even numbers can be used as indices.
If int y = scores[scores]; is executed, what will be the likely outcome?
If int y = scores[scores]; is executed, what will be the likely outcome?
- It will cause a syntax error.
- It will yield undefined behavior. (correct)
- It will return the last value in the scores array.
- It will reference an index based on the value at the first position.
What does the statement int z = scores[max(4,2)]; accomplish?
What does the statement int z = scores[max(4,2)]; accomplish?
What is the initial value of x in the provided code if int i = 1;?
What is the initial value of x in the provided code if int i = 1;?
What is the primary purpose of using an array in programming?
What is the primary purpose of using an array in programming?
Which statement accurately describes the size characteristics of an array?
Which statement accurately describes the size characteristics of an array?
How are individual elements within an array accessed?
How are individual elements within an array accessed?
What types of variables can be stored in a single array?
What types of variables can be stored in a single array?
If an array is defined to hold 150 integers, what kind of values will initially be in the array?
If an array is defined to hold 150 integers, what kind of values will initially be in the array?
In the context of arrays, what does 'contiguous memory' mean?
In the context of arrays, what does 'contiguous memory' mean?
Which of the following operations cannot be performed on arrays?
Which of the following operations cannot be performed on arrays?
What happens if a programmer tries to access an index in an array that does not exist?
What happens if a programmer tries to access an index in an array that does not exist?
Why might using an array be more convenient than individual variables?
Why might using an array be more convenient than individual variables?
What must a programmer do to use an array effectively?
What must a programmer do to use an array effectively?
What will happen if a function is called before its prototype is declared?
What will happen if a function is called before its prototype is declared?
What does a function prototype include?
What does a function prototype include?
Why are prototypes critical in programming?
Why are prototypes critical in programming?
What is the correct way to declare a function prototype for triangle_area?
What is the correct way to declare a function prototype for triangle_area?
What is the role of the function main() in the given content?
What is the role of the function main() in the given content?
How does a compiler find the order of function definitions when compiling?
How does a compiler find the order of function definitions when compiling?
What may happen if you do not use prototypes for functions?
What may happen if you do not use prototypes for functions?
What does the return statement in the triangle_area function do?
What does the return statement in the triangle_area function do?
Study Notes
Arrays Basics
- Fixed size collection of variables with the same type, accessible with an index.
- Stored contiguously in memory.
- Cannot be resized after creation.
- One name refers to all variables in the array.
- Indexed from 0 to n-1, where n is the size of the array.
Index vs. Value
- The expression in brackets is an index.
- Array[index] returns the value at that index.
- An index can be any expression, including values from arrays and functions.
Array Intro (1)
- Initial values can be garbage values.
- Arrays can be initialized declaratively.
- Arrays can be initialized using a for loop.
More Function Details
- Functions need to be defined or prototyped before use.
- Prototypes provide the compiler with information about function arguments and return types.
- Prototypes are needed to allow the compiler to verify function calls before the function definition.
- Prototypes are especially important when functions are defined in separate files.
- Prototypes help ensure that the arguments are correctly passed to the function and prevent errors.
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Description
This quiz covers the fundamental concepts of arrays, including their fixed size, index-based access, and memory storage. It also delves into the details of function prototypes and their significance in programming, particularly for array manipulation. Test your knowledge on these essential programming topics.
