C# Chapter 2 Review cloned 10/28/2019

Last updated over 6 years ago

19 questions

1

1. A variable declaration must contain all of the following except a(n) ______________.

Data Type

Identifier

Assigned Value

Ending Semicolon

Two variables of different types can be declared in the same statement.

 Two variables of the same type can be declared in the same statement.

Two variables of the same type must be declared in the same statement.

Two variables of the same type cannot coexist in a program.

 WriteLine("{0}{1}{2}", var1, var2); 

 WriteLine("{0}{1}{0}", var2, var1); 

 WriteLine("{0}{1}{2}", var2, var1); 

 WriteLine("{0}{1}{0}", var1, var2); 

 WriteLine("X{0}X", var1); 

 WriteLine("X{0,2}X", varl);

 WriteLine("X{2,0}X", varl); 

 WriteLine("X{0}{2}", varl); 

27

7

1

0

21

7.333

char

it

bool

double

=>

!=

==

<

0

1

true

false

float

double

decimal

int

13

13.0

13.00

13.000000

 WriteLine(salary.ToString("c")); 

 WriteLine(salary.ToString("c0")); 

 WriteLine(salary); 

two of these

 C# chooses a unifying type for the result 

 you must choose a unifying type for the result 

 you must provide a cast 

 you receive an error message 

 an object-oriented language 

 a subset of the C# language 

  a 16-bit coding scheme 

 another term for hexadecimal 

 string device = 'computer'; 

 string device = "computer"; 

 char device = 'computer'; 

 char device = "computer"; 

 stringl = string2 

 stringl == string2 

 Equals.String(string1, string2) 

 two of the above 

 1. A variable declaration must contain all of the following except a(n) ______________.

Data Type

Identifier

Assigned Value

Ending Semicolon

  Which of the following is true of variable declarations?

Two variables of different types can be declared in the same statement.

 Two variables of the same type can be declared in the same statement.

Two variables of the same type must be declared in the same statement.

Two variables of the same type cannot coexist in a program.

Assume that you have two variables declared as int var1 = 3; and int var2 = 8;. Which of the following would display 838?

 WriteLine("{0}{1}{2}", var1, var2); 

 WriteLine("{0}{1}{0}", var2, var1); 

 WriteLine("{0}{1}{2}", var2, var1); 

 WriteLine("{0}{1}{0}", var1, var2); 

Assume that you have a variable declared as int var1 = 3;. Which of the following would display X 3X?

 WriteLine("X{0}X", var1); 

 WriteLine("X{0,2}X", varl);

 WriteLine("X{2,0}X", varl); 

 WriteLine("X{0}{2}", varl); 

Assume that you have a variable declared as int varl = 3;. What is the value of 22 % var1?

27

7

1

0

Assume that you have a variable declared as int var1 = 3;. What is the value of 22 / var1?

21

7.333

7

1

What is the value of the expression 4 + 2 * 3?

0

10

18

36

Assume that you have a variable declared as int var1 = 3;. If var2 = ++var1, what is the value of var2?

2

3

4

5

Assume that you have a variable declared as int var1 = 3;. If var2 = var1++, what is the value of var2?

2

3

4

5

A variable that can hold the two values true and false is of type ______________.

char

it

bool

double

 Which of the following is not a C# comparison operator?

=>

!=

==

<

What is the value of the expression 6 >= 7?

0

1

true

false

Which of the following C# types cannot contain floating-point numbers?

float

double

decimal

int

Assume that you have declared a variable as double hourly = 13.00;. What will the statement WriteLine(hourly); display?

13

13.0

13.00

13.000000

Assume that you have declared a variable as double salary = 45000.00;. Which of the following will display $45,000?

 WriteLine(salary.ToString("c")); 

 WriteLine(salary.ToString("c0")); 

 WriteLine(salary); 

two of these

When you perform arithmetic operations with operands of different types, such as adding an int and a float____________________ .

 C# chooses a unifying type for the result 

 you must choose a unifying type for the result 

 you must provide a cast 

 you receive an error message 

Unicode is_____________________.

 an object-oriented language 

 a subset of the C# language 

  a 16-bit coding scheme 

 another term for hexadecimal 

Which of the following declares a variable that can hold the word computer?

 string device = 'computer'; 

 string device = "computer"; 

 char device = 'computer'; 

 char device = "computer"; 

Which of the following compares two string variables named string1 and string2 to determine if their contents are equal?

 stringl = string2 

 stringl == string2 

 Equals.String(string1, string2) 

 two of the above 