Deck 4: Introduction to Problem Solving and Control Statements

Question 1

Which of the following is true?

A)Pseudocode is used to specify the variables needed by the program.
B)Pseudocode compiles into machine code.
C)Pseudocode is used to describe executable statements that will eventually be translated by the programmer into a program.
D)Pseudocode is executed on a computer.

Answer 1

C

Question 2

Pseudocode must be written in an editor capable of understanding it and the language to which it pertains.

Answer 2

False

Question 3

What kind of language is pseudocode?

A)a hybrid language of all .NET languages
B)an informal language used to develop algorithms
C)a language used to translate from C++ to Visual Basic
D)None of the above.

Answer 3

B

Question 4

A transfer of control occurs when:

A)a program changes from input to output,or vice versa
B)a logic error occurs in a program
C)a statement other than the next sequential one in the program executes
D)None of the above.

Question 5

Program control is best defined as:

A)the degree of control a program has over the computer on which it's executed
B)the line of code that is executing at a given time
C)the order in which a series of statements is executed
D)None of the above.

Question 6

The three types of selection statements are:

A)If…Then,For…Next and Select…Case
B)If…Then,For…Next and Select…Case
C)If…Then,If…Then…Else and While
D)If…Then,If…Then…Else and Select…Case

Question 7

With sequential execution,statements execute one after the other in the order in which they appear in the program.

Question 8

Pseudocode is most comparable to which of the following languages?

A)Visual Basic
B)C#
C)Java
D)English

Question 9

Pseudocode helps you conceptualize a program during the design process.

Question 10

Which of the following is a double-selection control statement?

A)Do While…Loop
B)For…Next
C)If…Then…Else
D)If…Then

Question 11

An algorithm specifies only the order in which to solve a problem.

Question 12

Programs can be written,compiled and executed with pseudocode.

Question 13

Control statements cannot be placed inside other control statements.

Question 14

The order of actions in an algorithm is irrelevant.

Question 15

Which of the following is not an algorithm?

A)a recipe
B)the instructions for assembling a bicycle.
C)a textbook index
D)shampooing instructions (lather,scalp message,rinse)

Question 16

Which of the following is a type of control structure?

A)declaration structure
B)repetition structure
C)flow structure
D)All of the above.

Question 17

What is an algorithm?

A)a specification of a series of actions and the order in which those actions should be performed to solve a particular problem
B)an English description of a problem to be solved
C)the process of converting between data types
D)None of the above.

Question 18

Which of the following are examples of control statements?

A)If…Then
B)If…Then…Else
C)While…End While
D)All of the above

Question 19

Pseudocode normally describes only executable statements.

Question 20

Which statement is false?

A)Unless directed otherwise,the computer executes statements one after the other in the order in which they're written.
B)UML activity diagrams normally show the Visual Basic code that implements the activity.
C)Like pseudocode,activity diagrams help programmers develop and represent algorithms.
D)The arrows in the activity diagram represent transitions,which indicate the order in which the actions represented by the action states occur.

Question 21

A decision symbol in an activity diagram takes the shape of a ________.

A)diamond
B)rectangle
C)circle
D)question mark

Question 22

Which of the following loop-continuation conditions would cause a While…End While statement to stop executing?

A)3 <= 11
B)7 > 14
C)6 <> 9
D)All of the above.

Question 23

None of the guard conditions associated with a decision symbol may be false.

Question 24

A While…End While statement allows the programmer to specify that an action should repeat while:

A)a specific condition remains False
B)a specific condition remains True
C)a specific condition remains either True or False
D)None of the above.

Question 25

A Do Until…Loop structure allows you to specify that an action should repeat until:

A)a specific condition becomes true
B)a specific condition becomes false
C)a specific condition becomes either true or false
D)None of the above

Question 26

The If…Then statement is a single-repetition statement.

Question 27

If…Then…Else selection statement allows you to specify that a different action (or sequence of actions)be performed when the condition is true than when the condition is false.

Question 28

The Do While…Loop statement behaves like a While…End While statement except _________.

A)The Do While…Loop statement will execute the body once before checking the condition.
B)The Do While…Loop statement will execute the body once more after the loop terminates.
C)a and b
D)nothing (there is no difference)

Question 29

What is output in the GUI by the following Visual Basic code segment?

A)This porridge is too hot.
B)This porridge is too cold.
C)This porridge is just right!
D)None of the above.

Question 30

What marks the end of a Do While…Loop repetition statement?

A)End While
B)End Do While
C)Loop
D)End Loop

Question 31

If…Then…Else statements may be stacked but not nested.

Question 32

In an activity diagram,the merge symbol has the same shape as what other symbol?

A)decision symbol
B)action symbol
C)transition arrows
D)initial state

Question 33

Which of the following is not included in an activity diagram for a control structure?

A)transition arrows
B)attributes
C)action states
D)decision symbols

Question 34

Failure to provide the body of a Do Until…Loop structure with an action that eventually causes the condition to become false creates an infinite loop.

Question 35

If…Then is a _________ statement.

A)restricted
B)selection
C)repetition
D)unrestricted

Question 36

What capability does the If…Then…Else statement provide that the If…Then statement does not?

A)the ability to execute different actions when the condition is True or False
B)the ability to nest structures
C)the ability to stack structures
D)None of the above.

Question 37

A repetition statement allows you to specify that an action should be repeated,depending on the value of:

A)a statement
B)a variable
C)a control structure
D)a condition

Question 38

The If…Then selection statement performs an action if a condition is true or skips the action if the condition is false

Question 39

What marks the end of the Do Until repetition statement?

A)End Until
B)End Do Until
C)Loop
D)End Loop

Question 40

What is output in the GUI by the following Visual Basic code segment?

A)This porridge is too cold! This porridge is just right!
B)This porridge is too hot! This porridge is just right!
C)This porridge is just right!
D)None of the above.

Question 41

What does the expression x \= 10 do?

A)Multiplies 10 by the value of x,and stores the result in x.
B)Divides x by 10 and stores the remainder in x.
C)Divides x by 10 and stores the integer result in x.
D)None of the above.

Question 42

The Do While…Loop statement behaves differently than the While…End While statement.

Question 43

Placing a space character between the symbols that compose an abbreviated arithmetic assignment operator improves readability.

Question 44

If a While…End While statement's condition is initially false,the body statement(s)are not performed.

Question 45

To place a new item in a ListBox,call the Items property's Add method.

Question 46

a - = 3 can also be represented by the expression a = a - 3.

Question 47

For a ListBox,calling the Items property's __________ method removes all the items in the ListBox.

A)Clear
B)Empty
C)Remove
D)Delete

Question 48

The expression d *= 4 is an abbreviation for:

A)d = 4d
B)d * 4 = d
C)d = d * 4
D)d * d = 4

Question 49

Which statement is true?

A)Dividing two integers results in an integer answer.
B)With integer division,any fractional part of the calculation is lost.
C)With integer division of float values,the numerator and denominator are rounded before the calculation.
D)All of the above.

Question 50

A ListBox's __________ property keeps track of the values in the ListBox.

A)Items
B)Values
C)Entries
D)List

Question 51

Because the condition of a While…End While statement is before the body,the body is executed only once after the condition becomes false.

Question 52

A Form's default Button is the one that will be pressed when the user presses the Enter key and is specified by setting the Form's __________ property to the appropriate Button.

A)DefaultButton
B)SetButton
C)AcceptButton
D)EnterButton

Question 53

Variables that store totals should typically be initialized to zero before being used in a program.

Question 54

When the number of repetitions is known before a loop begins executing,it is most appropriate to use____________________ .

A)definite repetition
B)infinite repetition
C)total repetition
D)None of the above.

Question 55

Which of the following correctly represents the expression a = a + 3?

A)3a
B)a += 3
C)a + 3
D)None of the above.

Question 56

How many times is the body of the loop below executed?

A)19
B)20
C)21
D)0

Question 57

A__________________ can be used in a repetition structure to control the number of times a set of statements will execute.

A)declaration
B)counter
C)controller
D)None of the above.

Question 58

Counter-controlled repetition is also known as:

A)definite repetition
B)indefinite repetition
C)multiple-repetition structure
D)double-repetition structure

Question 59

The Do Until…Loop repetition structure tests a condition for falsity for repetition to continue.

Question 60

Calling a control's Activate method makes the control the active control-the one that will respond to the user's interactions.

Question 61

Local variables must be ________.

A)initialized when they are declared.
B)initialized before their values are used in an expression.
C)declared and initialized in two steps.
D)declared at the top of the method.

Question 62

Using top-down,stepwise refinement properly results in pseudocode that can be naturally evolved into a Visual Basic program.

Question 63

To execute a program one statement at a time without entering the code of a called method,use the debugger's__________ command.

A)Step Under
B)Step Over
C)Step Into
D)Step Out Of

Question 64

Integer division may yield a non-integer result.

Question 65

The off-by-one syntax error is frequently caused by using an incorrect relational operator in a loop's condition.

Question 66

When you know how many times a loop will execute in advance,a _______ loop should be used.

A)sentinel
B)infinite
C)counter-controlled
D)None of the above.

Question 67

Logic errors prevent a program from compiling successfully and can cause a running program to produce incorrect results.

Question 68

Which of the following is not a debugger feature?

A)examining and setting variable values
B)watching the values of variables and expressions
C)viewing the order in which methods are called
D)locating syntax errors

Question 69

Having many levels of nesting improves program readability.

Question 70

The phrase nested control statement refers to a control statement:

A)above a control statement
B)within a control statement
C)below a control statement
D)beside a control statement

Question 71

Counter-controlled repetition is often called definite repetition because the number of repetitions is known before the loop begins executing.

Question 72

What is typically the most difficult part of solving a problem on a computer?

A)deciding what problem needs to be solved
B)developing the algorithm for the solution
C)producing a program from the algorithm
D)None of the above.

Question 73

Which statement is true?

A)An If…Then statement cannot be nested inside a While statement.
B)An If…Then statement cannot be nested inside an If…Then statement.
C)A While statement cannot be nested inside an If…Then statement.
D)None of the above.