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AP Computer Science A
Unit 4: Iteration
4.3 Iterating Over Arrays
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Arrays store a collection of elements of the same
type
`for` loops require an iterator that starts at
0
`for-each` loops improve array iteration
readability
To access the element at index 2 in array `arr`, you use `arr[
2
]
The `for-each` loop can modify array elements during iteration.
False
The `for` loop allows access to array elements using their
index
What is the key advantage of the `for-each` loop over the `for` loop in terms of code clarity?
Improves readability
What is the primary purpose of the `for-each` loop in Java?
Simplified array iteration
The `for` loop can modify
array
elements during iteration.
True
To access the element at index 2 in array `arr`, you use `arr[
2
]
`
for
` loops provide flexibility to access array elements in any order
True
Match the loop type with its feature:
`for` Loop ↔️ By index
`for-each` Loop ↔️ Directly
`for` loops allow access to each element by its
index
The `for-each` loop requires an iterator to start at 0 and increment to the array length.
False
The `
for-each
` loop improves code readability compared to the `for` loop.
True
Match the array iteration technique with its feature:
`for` Loop ↔️ By index
`for-each` Loop ↔️ Directly
The `for-each` loop is less flexible but offers higher
readability
The `for` loop uses an iterator, condition, and
increment
What are the two primary methods for accessing array elements during iteration in Java?
`for` and `for-each` loops
The `for-each` loop provides a simplified way to access array elements
directly
The `for-each` loop can modify array elements during iteration.
False
The `for-each` loop provides a simplified way to access array elements without using
indices
Array indices in
Java
start at 0.
True
The `for-each` loop is a simplified way to access array elements directly without using
indices
Order the features of array iteration methods based on their complexity:
1️⃣ `for-each` loop
2️⃣ `for` loop
A `for-each` loop allows modification of array elements during iteration.
False
The iterator in a `for` loop starts at 1 and increments until the length of the array.
False
A `
for-each
` loop is more readable than a `for` loop.
True
A `for-each` loop provides high flexibility in accessing array elements.
False
A `for-each` loop has lower readability compared to a `for` loop.
False
A `for` loop allows modification of
array
elements during iteration.
True
The `for` loop requires an iterator that starts at
0
and increments until it reaches the length of the array.
The `for-each` loop cannot modify array elements during iteration.
True
The `for` loop requires an iterator that increments after each
iteration
.
The `for-each` loop improves the readability of
array
iteration.
True
The increment in a `for` loop updates the
iterator
after each iteration.
True
The `for-each` loop offers higher flexibility than the `for` loop.
False
When iterating over arrays, you can access elements using either a `for` loop or a `for-each`
loop
.
What is the syntax used to access array elements in a `for` loop in Java?
a
r
r
a
y
[
i
]
array[i]
a
rr
a
y
[
i
]
In a `for` loop, array elements are accessed using their
index
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