Question 1

C# provides a special loop known as the ____________, that automatically iterates once for each element in the array.
A) do-while loop
B) foreach loop
C) for loop
D) while loop

Accepted Answer

The foreach loop is specifically designed for iterating through arrays or other collections and is the best option for iterating through each element in an array.

Question 2

A(n) ____________ occurs when a loop iterates one time too many or one time too few.
A) off-by-one error
B) buffer overrun
C) system crash
D) logic error

Accepted Answer

An off-by-one error occurs when a loop iterates one time too many or one time too few. This can happen when a programmer starts counting from 0 instead of 1, or when they mix up an inequality sign in the loop conditions.

Question 3

____________ is a process that runs automatically in the background from time to time, removing all unreferenced objects from memory.
A) System cleanup
B) Garbage collection
C) Nullification
D) Non-maskable Interrupt

Accepted Answer

Garbage collection is a process that runs automatically in the background from time to time, removing all unreferenced objects from memory. This process helps to free up memory and prevent memory leaks in programs.

Question 4

The ____________ algorithm is much more efficient than a sequential search when the data set is very large.
A) random search
B) quick sort
C) binary search
D) combinatorial search

Accepted Answer

Binary search divides the data set in half with each iteration, allowing for a fast search even with a very large dataset. The other options are not as efficient or applicable in this context.

Question 5

When you process a(n) ____________, you must process only elements containing valid items.
A) partially filled array
B) reference copy
C) sequential search
D) Boolean expression

Accepted Answer

Processing a partially filled array means only processing the elements that have valid items, ignoring any unassigned elements. The other options are not relevant to this concept.

Question 6

Because arrays are always passed ____________, a method that receives an array as an argument has access to the actual array.
A) by value
B) globally
C) in memory
D) by reference

Accepted Answer

Arrays are always passed by reference, which means that a method that receives an array as an argument has access to the actual array in memory. This allows the method to modify the contents of the array directly, rather than working with a copy of the array or just its values.

Question 7

Various techniques known as ____________ have been developed to locate a specific item in a larger collection of data, such as an array.
A) search engine schematics
B) search algorithms
C) database logic
D) search protocols

Accepted Answer

The techniques referred to as "search algorithms" have been developed to locate specific items in larger collections of data, such as arrays. Option A is incorrect because search engine schematics refer to the internal workings of a search engine, not specific techniques for locating data within it. Option C is incorrect because database logic refers to the structure and organization of a database, not locating data. Option D is incorrect because search protocols refer to communication protocols for exchanging search data, not locating data within a collection.

Question 8

When only a reference to an object is copied rather than the object's contents, the copy is called a(n) ____________.
A) shallow copy
B) memory copy
C) value copy
D) reference copy

Accepted Answer

The answer of When only a reference to an object...

Question 9

When calling a method and passing an array variable as an argument, the variable contains a ____________ to the array.
A) variable
B) value
C) reference
D) parameter

Accepted Answer

When an array variable is passed as an argument to a method, it creates a reference to the array. This means that any changes made to the array within the method will affect the original array outside of the method as well. The other options (variable, value, and parameter) do not accurately describe the relationship between the array variable and the array when passed as an argument.

Question 10

With what value should the accumulator variable be initialized to calculate the total of all values in a numeric array?
A) null
B) false
C) 0
D) −1

Accepted Answer

The accumulator variable should be initialized to 0 because you want to add each value in the array to the current value of the accumulator, starting at 0. Initializing the accumulator variable to any other value could result in an incorrect total.

Question 11

To compare the contents of two arrays, you must compare each of the ____________ in the two arrays.
A) memory locations
B) reference variables
C) elements
D) size

Accepted Answer

The elements of the arrays are the actual data stored within them, so comparing these elements will determine whether the arrays contain the same contents. Memory locations and reference variables may be different for two arrays even if they have the same contents, so comparing these would not be accurate. Size may also be different between two arrays with the same contents, so a comparison of size would not be sufficient.

Question 12

To declare a two-dimensional array, two ____________ are required: The first one is for the number of rows, and the second one is for the number of columns.
A) reference variables
B) Boolean variables
C) named constants
D) size declarators

Accepted Answer

We need size declarators to declare the size of a two-dimensional array. The first size declarator specifies the number of rows and the second size declarator specifies the number of columns.

Question 13

The foreach loop is designed to work with a temporary, read-only variable known as the ____________.
A) loop variable
B) counter variable
C) iteration variable
D) foreach variable

Accepted Answer

The temporary, read-only variable in a foreach loop is commonly known as the iteration variable as it holds the current value of the iteration during each loop. It is not a counter variable as it does not necessarily increment with each iteration, nor is it a loop variable as it is not typically used to control the loop itself. The term "foreach variable" is not commonly used or recognized in the context of a foreach loop.

Question 14

____________ arrays, also known as 2D arrays, can hold two sets of data.
A) Double-data
B) Two-dimensional
C) Row-column
D) Duel-derivative

Accepted Answer

Two-dimensional arrays are also known as 2D arrays and can hold two sets of data organized in rows and columns.

Question 15

To successfully ____________ the contents of two variables, we need a third variable that can serve as a temporary storage location.
A) copy
B) exchange
C) reference
D) remove

Accepted Answer

To exchange the contents of two variables, a third variable is often used as a temporary storage location to hold the value of one variable while the values are swapped. This ensures that one of the original values is not lost during the exchange process.

Question 16

The ____________ works like this: The smallest value in the array is located and moved to element 0. The next smallest value is located and moved to element 1. This process continues until all the elements have been placed in their proper order.
A) bubble sort
B) binary search
C) Boolean swap
D) selection sort

Accepted Answer

The described process is the algorithm for selection sort.

Question 17

Look at the following code sample: int[] numbers = { 1, 2, 3, 4, 5 };
Int highest = numbers[0];
For (int index = 1; index < numbers.Length; index++)
{
If (numbers[index] > highest)
{
Highest = numbers[index];
}
}
What value will the highest variable contain when the loop finishes?
A) 1
B) 3
C) 5
D) 15

Accepted Answer

The loop iterates through the array of numbers and checks if the current number is greater than the value stored in the highest variable. If it is, the highest variable is updated to the current number. Therefore, the highest variable will contain the value 5 when the loop finishes.

Question 18

____________ arrays can only hold one set of data.
A) One-dimensional
B) Two-dimensional
C) Data bound
D) Classical

Accepted Answer

A one-dimensional array, also known as a single-dimensional array or linear array, is a data structure that holds a collection of elements of the same type. It is structured as a sequence of elements that can be accessed using an index. One-dimensional arrays can hold only one set of data. Two-dimensional arrays, on the other hand, can hold multiple sets of data organized in rows and columns. Data bound and classical do not describe the type of array structure.

Question 19

In C#, all arrays have a(n) ____________ that equals the number of elements in the array.
A) Element property
B) getSize method
C) Length property
D) GetBounds method

Accepted Answer

In C#, the Length property is used to determine the number of elements in an array. It returns an integer indicating the number of elements in the array. The other options provided, like Element property, getSize method, GetBounds method, are not applicable in C# for determining the number of elements in an array.

Question 20

The ____________ uses a loop to step through the elements in an an array one by one, from the first to the last.
A) sequential search algorithm
B) optimized search algorithm
C) binary search algorithm
D) basic array traversal algorithm

Accepted Answer

A sequential search algorithm examines each element in the array one by one from the first to the last until it finds the target value or reaches the end of the array.

Quiz 7: Arrays and Lists

C# provides a special loop known as the ____________, that automatically iterates once for each element in the array.

A(n) ____________ occurs when a loop iterates one time too many or one time too few.

____________ is a process that runs automatically in the background from time to time, removing all unreferenced objects from memory.

The ____________ algorithm is much more efficient than a sequential search when the data set is very large.

When you process a(n) ____________, you must process only elements containing valid items.

Because arrays are always passed ____________, a method that receives an array as an argument has access to the actual array.

Various techniques known as ____________ have been developed to locate a specific item in a larger collection of data, such as an array.

When only a reference to an object is copied rather than the object's contents, the copy is called a(n) ____________.

When calling a method and passing an array variable as an argument, the variable contains a ____________ to the array.

With what value should the accumulator variable be initialized to calculate the total of all values in a numeric array?

To compare the contents of two arrays, you must compare each of the ____________ in the two arrays.

To declare a two-dimensional array, two ____________ are required: The first one is for the number of rows, and the second one is for the number of columns.

The foreach loop is designed to work with a temporary, read-only variable known as the ____________.

____________ arrays, also known as 2D arrays, can hold two sets of data.

To successfully ____________ the contents of two variables, we need a third variable that can serve as a temporary storage location.

The ____________ works like this: The smallest value in the array is located and moved to element 0. The next smallest value is located and moved to element 1. This process continues until all the elements have been placed in their proper order.

Look at the following code sample: int[] numbers = { 1, 2, 3, 4, 5 }; Int highest = numbers[0]; For (int index = 1; index < numbers.Length; index++) { If (numbers[index] > highest) { Highest = numbers[index]; } } What value will the highest variable contain when the loop finishes?

____________ arrays can only hold one set of data.

In C#, all arrays have a(n) ____________ that equals the number of elements in the array.

The ____________ uses a loop to step through the elements in an an array one by one, from the first to the last.