Deck 3: Introduction to C# Apps

Question 1

Special characters can be inserted in comments that affect how the program exe
cutes.

Answer 1

False
The compiler completely ignores comments;they're for human use only.

Question 2

"\" is known as an escape sequence.

Answer 2

False
an escape sequence is a combination of the escape character ("\")and another character.

Question 3

What does IntelliSense help you do

A)Detect errors
B)Simplify writing code
C)Compile your code
D)a and c

Answer 3

B

Question 4

A single line comment in C# begins with:

A) */
B) #
C) //
D) \\

Question 5

Where can't you see errors

A)The line where the error occurred
B)The Error List window
C)The Solution window

Question 6

Which of the following have the capacity to display formatted data from an interpolated string

A)Console.Write
B)Console.WriteLine
C)Console.WriteFormat
D)a and b

Question 7

The "\t" escape sequence moves the screen cursor to the top of the screen.

Question 8

Syntax errors are not identified before you attempt to com
pile a C# program using Visual Studio 2012.

Question 9

How are console apps displayed

A)In a window form.
B)In the Command Prompt.
C) Console apps have no output to display.
D) It depends.

Question 10

_________ are violations of language rules.

A) Logic errors
B) Syntax errors
C) Run-time errors
D) None of the above.

Question 11

Files called assemblies are packaging units for code in C#.

Question 12

Statements in C# end with:

A) :
B) ;
C) #
D) )

Question 13

Apps that contain only text output are referred to as

A) text apps
B) console apps
C) simple apps
D) None of the above.

Question 14

C# is case insensitive,therefore an identifier named Pencil is the same as one named pencil.

Question 15

Namespaces group various C# features into related categories.

Question 16

The console window is called the command prompt.

Question 17

The Parameter Info window indicates how many versions of the selected method are available.

Question 18

Programmers insert comments in programs to document and improve the read
ability of their code.

Question 19

The starting point of a C# program is the method.

A) Main
B) Start
C) Open
D) None of the above.

Question 20

Only some C# programs contain class definitions.

Question 21

When a value is placed in a memory location,the previous value in that loca
tion is moved to the next available location in memory.

Question 22

Which of the following is the equality operator

A) =
B) !=
C) =!
D) ==

Question 23

Arithmetic expressions in C# must be written in straight-line form.

Question 24

An assignment statement is evaluated from left to right.

Question 25

The fractional part in integer division is stored in a variable declared automat
ically at run-time.

Question 26

Every variable has a  .

A) type
B) size
C) value
D) All of the above.

Question 27

Which of the following is in highest-to-lowest order of operator precedence

A) multiplication, division, parentheses
B) addition, subtraction, division
C) parentheses, multiplication, addition
D) None of the above.

Question 28

Which of the following represents multiplication

A) *
B) /
C) %
D) ^

Question 29

Binary operators require two operands.

Question 30

Interpolation expressions are enclosed in square brackets ([]).

Question 31

The process of reading from a memory location is nondestructive.

Question 32

A variable is:

A) an instruction for the compiler
B) a location in memory where a value can be stored
C) a description of a value (such as a number or character)
D) None of the above.

Question 33

A directs a user to take a specific action.

A) declaration
B) error
C) prompt
D) None of the above.

Question 34

The statement allows a program to make a decision based on the truth or falsity of some condition.

A) if
B) test
C) logic
D) None of the above.

Question 35

Variable names correspond to locations in the computer's memory.

Question 36

What does the following statement display
Console.WriteLine(
$"{"Welcome to "}\n{"C# Programming!"}");

A) Welcome to C# Programming!
B) Welcome to C# Programming!
C) {"Welcome to "} {"C# Programming!"}
D) None of the above

Question 37

What will the variable x have at end of the following code
Int x = 10;
X = 20;
X = 30;
X = 10;

A) 10
B) 20
C) 30
D) The sum of the values
E) The code will produce an error

Question 38

It's good practice to fit as many statements as possible on a single line.

Question 39

Using redundant parentheses in mathematical expressions may cause errors.

Question 40

A declaration may declare only one variable at a time.

Question 41

Concatenation is the process that enables a string and another string or a value of another data type to be combined to form a new string.