Question 1

Which foreach header represents iterating through an array of int named numbers

Accepted Answer

A)  foreach (numbers) 
B)   foreach (number in numbers) 
C)   foreach (int number in numbers) 
D)   foreach (int number in int[] numbers) E) B) and D)
F) A) and B)

Question 2

Which of the following statements about creating arrays and initializing their elements is false

Accepted Answer

A)   The new keyword should be used to create an array.
B)   When an array is created, the number of elements must be placed in square brackets following the type of element being stored.
C)   The elements of an array of integers have a value of null before they are initialized.
D)   A for loop is an excellent way to initialize the elements of an array.E) A) and B)
F) B) and D)

Question 3

Which method call does the method header void ModifyArray(double[] b)  represent ? Assume that the array being passed in is already defined and is called list.

Accepted Answer

A)   ModifyArray(double[] list) 
B)   ModifyArray(double[] : list) 
C)   ModifyArray(double list[]) 
D)   ModifyArray(list) E) All of the above
F) A) and D)

Question 4

Passing a reference with keyword ref gives the called method control over the passed reference itself.

Accepted Answer

A) True 
 B)False

Question 5

If you want to pass an array element into a method by reference,what will you need to do

Accepted Answer

A)   It always passes the element as a reference automatically.
B)   Use the keyword ref and/or out. 
C)   All of the above.
D)   None of the above, passing in by reference of an array element is only possible if the array type is a reference type.E) B) and C)
F) A) and B)

Question 6

When accessing an element of an array,operations (calculations)are not allowed inside the brackets of an array.

Accepted Answer

A) True 
 B)False

Question 7

What do the following statements do
Double[] array;
Array = new double[14];

Accepted Answer

A)   Creates a double array containing 13 elements.
B)   Creates a double array containing 14 elements.
C)   Creates a double array containing 15 elements.
D)   Declares but does not create a double array.E) C) and D)
F) B) and D)

Question 8

Consider the class below:
Class Test
{
Static void Main() 
{
Int[] a = {99,22,11,3,11,55,44,88,2,-3};
Int result = 0;
For (int i = 0;i  30) 
{
Result += a[i];
}
}
Console.WriteLine($"Result is: {result}") ;
}
}
The output of this C# program will be:

Accepted Answer

A)   Result is: 280
B)   Result is: 154
C)   Result is: 286
D)   Result is: 332E) All of the above
F) B) and C)

Question 9

Which of the following statements is false

Accepted Answer

A)   When the runtime or a method detects a problem, such as an invalid array index or an invalid method argument, it throws an exception-that is, an exception occurs.
B)   Exceptions are always thrown by the runtime.
C)   To handle an exception, place any code that might throw an exception in a try statement.
D)   The try block contains the code that might throw an exception, and the catch block contains the code that handles the exception if one occurs.E) C) and D)
F) All of the above

Question 10

Which expression adds 1 to the element of array arrayName at index i,assuming the array is of type int

Accepted Answer

A)   ++arrayName[i]
B)   arrayName++[i]
C)   arrayName[i++]
D)   None of the above.E) A) and B)
F) A) and C)

Question 11

In an array of reference types,each element may be a reference to a different type.

Accepted Answer

A) True 
 B)False

Question 12

What is the proper foreach header format

Accepted Answer

A)  (foreach type_identifer in arrayName) 
B)  foreach (arrayName) 
C)  foreach (type_identifer in arrayName) 
D)  None of the above.E) A) and B)
F) B) and C)

Question 13

The first element in every array is the 0th element.

Accepted Answer

A) True 
 B)False

Question 14

Each reference in an array of references is set to null by default when the array is allocated.

Accepted Answer

A) True 
 B)False

Question 15

Consider the class below:
Class Test
{
Static void Main() 
{
Int[] a = new int[10];
For (int i = 0;i < a.Length;++i) 
{
A[i] = i + 1 * 2;
}
Int result = 0;
For (int i = 0;i < a.Length;++i) 
{
Result += a[i];
}
Console.WriteLine($"Result is: {result}") ;
}
}
The output of this C# program will be:

Accepted Answer

A)   Result is: 62
B)   Result is: 64
C)   Result is: 65
D)   Result is: 67E) A) and B)
F) A) and D)

Question 16

When an app is executed from the Command Prompt,the execution environment passes the command-line arguments to the Main method as a string.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following initializer lists would correctly set the elements of array n

Accepted Answer

A)   int[] n = {1, 2, 3, 4, 5};
B)   array n[int] = {1, 2, 3, 4, 5};
C)   int n[5] = {1; 2; 3; 4; 5};
D)   int n = new int(1, 2, 3, 4, 5) ;E) B) and D)
F) A) and C)

Question 18

[C#6] Which of the following statements is false

Accepted Answer

A)  Prior to C# 6,auto-implemented properties required both a get and a set accessor.
B)  Client code can use C# 6 getter-only auto-implemented properties only to get each property's value.
C)  C#6 getter-only auto-implemented properties are read only.
D)  C#6 getter-only auto-implemented properties can be initialized only in their declarations.E) A) and C)
F) None of the above

Question 19

When a C# program executes,the runtime checks array element indices for validity-all indices must be greater than or equal to 0 and less than the length of the array.Any attempt to access an element outside that range of indices results in a runtime error known as a(n) ________.

Accepted Answer

A)   IndexRangeError
B)   SubscriptException
C)   IndexOutOfRangeException
D)   SubscriptRangeErrorE) A) and B)
F) A) and C)

Question 20

Consider integer array values,which contains 5 elements.Which statements successfully swap the contents of the array at index 3 and index 4

Accepted Answer

A)   values[3] = values[4];values[4] = values[3];
B)   values[4] = values[3];values[3] = values[4];
C)   int temp = values[3];values[3] = values[4];values[4] = temp;
D)   int temp = values[3];values[3] = values[4];values[4] = values[3];E) A) and B)
F) A) and D)

Exam 8: Arrays;Introduction to Exception Handling

[C#6] Which of the following statements is false

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Which of the following statements about creating arrays and initializing their elements is false

Correct AnswerverifiedShow Answer

Which foreach header represents iterating through an array of int named numbers

Correct AnswerverifiedShow Answer

Which of the following statements is false

Correct AnswerverifiedShow Answer

Passing a reference with keyword ref gives the called method control over the passed reference itself.

Correct AnswerverifiedShow Answer

Consider the class below: Class Test { Static void Main() { Int[] a = {99,22,11,3,11,55,44,88,2,-3}; Int result = 0; For (int i = 0;i < a.Length;++i) { If (a[i] > 30) { Result += a[i]; } } Console.WriteLine($"Result is: {result}") ; } } The output of this C# program will be:

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Which of the following initializer lists would correctly set the elements of array n

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Which method call does the method header void ModifyArray(double[] b) represent ? Assume that the array being passed in is already defined and is called list.

Correct AnswerverifiedShow Answer

Consider the class below: Class Test { Static void Main() { Int[] a = new int[10]; For (int i = 0;i < a.Length;++i) { A[i] = i + 1 * 2; } Int result = 0; For (int i = 0;i < a.Length;++i) { Result += a[i]; } Console.WriteLine($"Result is: {result}") ; } } The output of this C# program will be:

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Each reference in an array of references is set to null by default when the array is allocated.

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What do the following statements do Double[] array; Array = new double[14];

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If you want to pass an array element into a method by reference,what will you need to do

Correct AnswerverifiedShow Answer

When accessing an element of an array,operations (calculations)are not allowed inside the brackets of an array.

Correct AnswerverifiedShow Answer

Which expression adds 1 to the element of array arrayName at index i,assuming the array is of type int

Correct AnswerverifiedShow Answer

In an array of reference types,each element may be a reference to a different type.

Correct AnswerverifiedShow Answer

When a C# program executes,the runtime checks array element indices for validity-all indices must be greater than or equal to 0 and less than the length of the array.Any attempt to access an element outside that range of indices results in a runtime error known as a(n) ________.

Correct AnswerverifiedShow Answer

Consider integer array values,which contains 5 elements.Which statements successfully swap the contents of the array at index 3 and index 4

Correct AnswerverifiedShow Answer

What is the proper foreach header format

Correct AnswerverifiedShow Answer

The first element in every array is the 0th element.

Correct AnswerverifiedShow Answer

When an app is executed from the Command Prompt,the execution environment passes the command-line arguments to the Main method as a string.

Correct AnswerverifiedShow Answer

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