C# Chapter 2 Review cloned 10/28/2019 - Sarah Franklin | Biblioteka

1

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

Data Type

Identifier

Assigned Value

Ending Semicolon

1

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.

1

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);

1

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);

1

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

27

7

1

0

1

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

1

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

2

3

4

5

1

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

2

3

4

5

1

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

char

it

bool

double

1

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

=>

!=

==

<

1

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

0

1

true

false

1

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

float

double

decimal

int

1

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

1

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

1

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

1

Unicode is_____________________.

an object-oriented language

a subset of the C# language

a 16-bit coding scheme

another term for hexadecimal

1

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";

1

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