Loop Structures MCQs

Chapter 6: Loop Structures

MULTIPLE RESPONSE

Modified Multiple Choice

____ is a fundamental process that repeats instructions until a condition is true or while a condition is true.

a.	Iteration	c.	Looping
b.	Concatenation	d.	Documenting

ANS: A, C PTS: 1 REF: 378

Instead of typing the menu name on a MenuStrip object, you can add a ____ by clicking the Type Here box’s list arrow and selecting the appropriate choice

a.	radio button	c.	menu item
b.	combo box	d.	text box

ANS: B, C, D PTS: 1 REF: 383

A compound operator allows you to ____ values, storing the result in the same variable.

a.	add	c.	compare
b.	multiply	d.	divide

ANS: A, C, D PTS: 1 REF: 396

The ____ values used in a For...Next loop can vary based on input from a user.

a.	beginning	c.	ending
b.	step	d.	range

ANS: A, B, C PTS: 1 REF: 404

The Publish Wizard allows you to create an install file to be placed on a ____.

a.	floppy disk	c.	Web server
b.	network drive	d.	hard drive

ANS: B, C, D PTS: 1 REF: 426

MODIFIED TRUE/FALSE

When used in a menu name, the asterisk character is used to indicate that a character is a hot key. _________________________

ANS: F, ampersand

PTS: 1 REF: 383

Menu item hot keys are case sensitive. _________________________

ANS: F, are not

PTS: 1 REF: 385

Double-clicking a menu item in design mode opens the code editing window to the Click event handler for that menu item. _________________________

ANS: T PTS: 1 REF: 385

Smart actions can be specified for a menu by using Action Tags. _________________________

ANS: T PTS: 1 REF: 386

The Checked property of a ListBox object identifies which item in the ListBox has been selected. _________________________

ANS: F, SelectedItem

PTS: 1 REF: 395

MULTIPLE CHOICE

A(n) ____ is a group of commands presented in a list.

a.	action list	c.	menu
b.	input box	d.	status bar

ANS: C PTS: 1 REF: 380

The ____ prefix is used for a MenuStrip object.

a.	menu	c.	mst
b.	mns	d.	mnu

ANS: D PTS: 1 REF: 382

The ____ character is used to indicate that a letter is a hot key on a menu item.

a.	ampersand (&)	c.	back slash (\)
b.	forward slash (/)	d.	underscore (_)

ANS: A PTS: 1 REF: 383

The hot key for a menu item can be activated with the keyboard by pressing the ____ key and the hot key at the same time.

a.	ALT	c.	CTRL
b.	SHIFT	d.	TAB

ANS: A PTS: 1 REF: 383

A(n) ____ key is a keyboard shortcut for opening a menu.

a.	hot	c.	legend
b.	spot	d.	index

ANS: A PTS: 1 REF: 383

As shown in the accompanying figure, Visual Basic 2010 contains a(n) ____ Tag that allows you to create a full standard menu bar commonly provided in Windows programs.

a.	Menu	c.	Legend
b.	Action	d.	Glossary

ANS: B PTS: 1 REF: 386

The feature shown in the accompanying figure provides an easy way for you to specify ____ actions for an object as you design a form.

a.	baseline	c.	indexed
b.	smart	d.	object-oriented

ANS: B PTS: 1 REF: 386

The ____ function provides a dialog box that asks the user for input and provides an input area.

a.	InputArea	c.	MessageBox
b.	InputBox	d.	UserEntry

ANS: B PTS: 1 REF: 387

A ____ object displays a collection of items, or values, with one item per line.

a.	TextBox	c.	ListBox
b.	RadioButton	d.	CheckBox

ANS: C PTS: 1 REF: 390

Which line of code will add the value “East” to a ListBox object named lstDirections?

a.	lstDirections.Add(“East”)	c.	lstDirections.AddValue(“East”)
b.	lstDirections.Items.Add(“East”)	d.	lstDirections.Items.AddValue(“East”)

ANS: B PTS: 1 REF: 391

To remove all objects from a ListBox object, the ____ method is used.

a.	Clear	c.	Empty
b.	Items.Clear	d.	Items.Empty

ANS: A PTS: 1 REF: 392

The ____ property of a ListBox object identifies which item in the ListBox was selected.

a.	Item	c.	Selected
b.	ItemSelected	d.	SelectedItem

ANS: D PTS: 1 REF: 395

A(n) ____ variable collects a total value over a period of time.

a.	catalog	c.	register
b.	glossary	d.	accumulator

ANS: D PTS: 1 REF: 396

A(n) ____ variable keeps track of how many times a loop has executed.

a.	counter	c.	glossary
b.	accumulator	d.	register

ANS: A PTS: 1 REF: 396

A ____ operator allows you to perform arithmetic operations with a variable and store the results back to that variable.

a.	logical	c.	compressed
b.	rational	d.	compound

ANS: D PTS: 1 REF: 396

The compound operator ____ adds the value of the right operand to the value of the left operand and stores the result in the left operand’s variable.

a.	++	c.	=+
b.	+=	d.	==

ANS: B PTS: 1 REF: 397

The compound operator ____ is used to add a string to an existing string.

a.	&=	c.	&&
b.	=&	d.	==

ANS: A PTS: 1 REF: 397

A(n) ____ is a single repetition of a loop.

a.	rotation	c.	revolution
b.	iteration	d.	accumulation

ANS: B PTS: 1 REF: 399

A ____ loop is best used when the specific number of iterations required is known.

a.	Do…While	c.	For...Next
b.	Do…Until	d.	For…Until

ANS: C PTS: 1 REF: 399

A loop’s ____ variable is a numeric variable that keeps track of the number of iterations the loop completes.

a.	compound	c.	matrix
b.	accumulated	d.	control

ANS: D PTS: 1 REF: 399

The ____ follows the keyword For in a For...Next loop.

a.	keyword Next	c.	keyword To
b.	keyword Step	d.	control variable

ANS: D PTS: 1 REF: 399

A For...Next loop with a beginning value of 1, an ending value of 25, and a Step value of 3 will execute ____ times.

a.	3	c.	9
b.	8	d.	25

ANS: C PTS: 1 REF: 400

How many times will the following loop execute?

For intCount = 10 To 16 Step 2

‘Body of Loop

a.	3	c.	6
b.	4	d.	7

ANS: B PTS: 1 REF: 400

How many times will the following loop execute?

For intCount = 10 To 1 Step -2

‘Body of loop

a.	4	c.	9
b.	5	d.	10

ANS: B PTS: 1 REF: 401

If ____ appears as the first line of a loop, the loop is a top-controlled Do loop that will execute as long as a condition remains true.

a.	Loop While	c.	Loop Until
b.	Do While	d.	Do Until

ANS: B PTS: 1 REF: 406

A ____-controlled loop tests the condition before the loop body is executed.

a.	bottom	c.	top
b.	key	d.	function

ANS: C PTS: 1 REF: 406

A ____-controlled loop tests the condition after the code in the loop body has been executed.

a.	bottom	c.	top
b.	function	d.	key

ANS: A PTS: 1 REF: 406

If ____ appears as the last line of a loop, the loop is a bottom-controlled Do loop that will execute as long as a condition remains true.

a.	Loop While	c.	Loop Until
b.	Do While	d.	Do Until

ANS: A PTS: 1 REF: 409

If ____ appears as the first line of a loop, the loop is a top-controlled Do loop that will stop execution when a condition becomes true.

a.	Loop While	c.	Loop Until
b.	Do While	d.	Do Until

ANS: D PTS: 1 REF: 410

If ____ appears as the last line of a loop, the loop is a bottom-controlled Do loop that will stop execution when a condition becomes true.

a.	Loop While	c.	Until
b.	Do While	d.	Loop Until

ANS: D PTS: 1 REF: 412

As demonstrated in the accompanying figure, a loop that does not terminate is called a(n) ____ loop.

a.	breakaway	c.	runaway
b.	infinite	d.	unstoppable

ANS: B PTS: 1 REF: 412

Using a preset value for the variable tested in a loop condition is a process called ____ the loop.

a.	iterating	c.	presetting
b.	priming	d.	rebanding

ANS: B PTS: 1 REF: 413

The ____ function can be used to test if data entered by the user is numeric.

a.	IsInteger	c.	IsNumeric
b.	IsNumber	d.	IsNonAlpha

ANS: C PTS: 1 REF: 414

What will be the value of the variable intTotalCount when the following code is executed?

For intOuterCount = 1 to 5

For intInnerCount = 1 to 4

intTotalCount +=1

a.	4	c.	9
b.	5	d.	20

ANS: D PTS: 1 REF: 416

When in break mode, you can use ____ to examine the value of variables.

a.	DataTags	c.	DebugTags
b.	DataTips	d.	DebugTips

ANS: B PTS: 1 REF: 417

As shown in the accompanying figure, ____ are stop points placed in the code to tell Visual Studio 2010 debugger where and when to pause the execution of the program.

a.	breakpoints	c.	halt points
b.	debug points	d.	tracepoints

ANS: A PTS: 1 REF: 417

By default, when a program reaches the item shown in the accompanying figure and pauses execution, the line of code that is about to be executed is highlighted in what color?

a.	blue	c.	red
b.	green	d.	yellow

ANS: D PTS: 1 REF: 421

You can create a deployed version of a program by using the ____ process.

a.	ClickDeploy Installation	c.	ClickOnce Deployment
b.	ClickInstall Deployment	d.	ClickPublish Deployment

ANS: C PTS: 1 REF: 425

Before deployment, an application should be ____.

a.	complete	c.	debugged
b.	working properly	d.	all of the above

ANS: D PTS: 1 REF: 425

In order to run a program deployed with ClickOnce Deployment, the computer needs ____ installed on it.

a.	Microsoft Word	c.	PowerBuilder
b.	Visual Studio 2010	d.	none of the above

ANS: D PTS: 1 REF: 425

TRUE/FALSE

MenuStrip objects can be placed along any edge of the form, depending on which side is closer to the mouse pointer.

ANS: F PTS: 1 REF: 382

A hot key in a menu name must be the first letter.

ANS: F PTS: 1 REF: 384

Writing an event handler for a menu item is the same as writing an event handler for a button click.

ANS: T PTS: 1 REF: 385

The InputBox function returns a null string (“”) when a user clicks the Cancel button.

ANS: T PTS: 1 REF: 387

The prompt message displayed in an InputBox object can be customized by the programmer.

ANS: T PTS: 1 REF: 387

If the user enters a numeric value in an InputBox object, the InputBox function will return a numeric data type.

ANS: F PTS: 1 REF: 388

All data collected by an InputBox object is automatically converted to the best data type for the data.

ANS: F PTS: 1 REF: 388

An InputBox object allows user input without the need for a TextBox object on the Windows Form object.

ANS: T PTS: 1 REF: 388

When the user clicks the Cancel button in an input box and the InputBox function returns a null character, the program can test for the null character to determine further processing.

ANS: T PTS: 1 REF: 389

You must include a Step value in a For...Next loop, even if the Step value is 1.

ANS: F PTS: 1 REF: 400

The beginning and ending values for a For...Next loop must be predefined and cannot contain an expression.

ANS: F PTS: 1 REF: 401

The Step value for a For...Next loop must be a positive whole integer value.

ANS: F PTS: 1 REF: 401

A Step value in a For...Next loop can be positive or negative.

ANS: T PTS: 1 REF: 401

It is best to indent the body of the loop, to identify clearly the code that is being repeated.

ANS: T PTS: 1 REF: 403

The beginning, ending, and step values used in a For...Next loop can vary based on input from a user.

ANS: T PTS: 1 REF: 404

In a Do While loop, the body of the loop is executed until the condition becomes true.

ANS: F PTS: 1 REF: 406

A top-controlled loop is always executed at least once.

ANS: F PTS: 1 REF: 406

Starting a loop with a preset value for the variable tested in the condition is called priming the loop.

ANS: T PTS: 1 REF: 413

When expecting a number from an input box, the IsNumeric function should be used to ensure that the input data can be converted to a numeric variable.

ANS: T PTS: 1 REF: 414

Loops cannot be nested.

ANS: F PTS: 1 REF: 416

When nesting loops, the inner loop must be completely contained in the outer loop and must use a different control variable.

ANS: T PTS: 1 REF: 422

Use a For...Next loop when the number of repetitions is unknown.

ANS: F PTS: 1 REF: 417

Breakpoints are stop points placed in the code where execution will be paused during the execution of the program, and enter debug mode.

ANS: F PTS: 1 REF: 417

Only one breakpoint can be set in a program, as shown in the accompanying figure.

ANS: F PTS: 1 REF: 423

The installation files created by the ClickOnce Publishing Wizard can be used for a software release.

ANS: T PTS: 1 REF: 429

COMPLETION

A(n) ____________________ is a strip across the top of a window that contains one or more menu names.

ANS: menu bar

PTS: 1 REF: 380

A(n) ____________________ is a group of commands, or items, presented in a list.

ANS: menu

PTS: 1 REF: 380

In Visual Studio 2010, a(n) ____________________ object is used to place menus at the top of a Windows Application form.

ANS: MenuStrip

PTS: 1 REF: 381

The non-graphical Toolbox objects, such as MenuStrip objects, are organized and displayed below the form in the ____________________ at the bottom of the Visual Studio interface.

ANS: Component Tray

PTS: 1 REF: 382

The ____________________ procedure of the Windows Form object closes the form and causes the program to exit.

ANS: Close

PTS: 1 REF: 385

A(n) ____________________ object is a dialog box that prompts the user to enter a value.

ANS: InputBox

PTS: 1 REF: 387

The values in a ListBox are called ____________________.

ANS: items

PTS: 1 REF: 390

The ____________________ property of a ListBox identifies which item is selected.

ANS: SelectedItem

PTS: 1 REF: 395

The keyword ____________________ is the last line of a For loop.

ANS: Next

PTS: 1 REF: 399

A(n) ____________________ value is the value in a For...Next loop that is added to, or subtracted from, the beginning value on each iteration of the loop.

ANS:

Step

step

PTS: 1 REF: 400

A(n) ____________________ loop should be used when the iterations should continue while or until a condition is true or false.

ANS: Do

PTS: 1 REF: 405

A(n) ____________________ loop should be used when the iterations should continue as long as a condition remains true.

ANS: Do While

PTS: 1 REF: 405

A(n) ____________________ loop should be used when the iterations should continue until a condition becomes true.

ANS: Do Until

PTS: 1 REF: 406

A(n) ____________________ loop is a loop placed completely inside another loop.

ANS: nested

PTS: 1 REF: 416

The process of ____________________ involves resolving defects in the program code.

ANS: debugging

PTS: 1 REF: 417

A(n) ____________________ is used to pause the execution of code while debugging.

ANS: breakpoint

PTS: 1 REF: 417

While in break mode, you can examine the values in all variables that are within the scope of execution through the use of ____________________.

ANS: DataTips

PTS: 1 REF: 417

After an application is completely debugged and working properly, you can ____________________ it.

ANS: deploy

PTS: 1 REF: 425

In Visual Basic 2010, a deployed program can be created easily by using ____________________ Deployment.

ANS: ClickOnce

PTS: 1 REF: 425

The ____________________ Wizard is used to publish a program using ClickOnce Deployment.

ANS: Publish

PTS: 1 REF: 426

MATCHING

Identify the letter of the choice that best matches the phrase or definition.

a.	ListBox	f.	For...Next
b.	wizard	g.	breakpoint
c.	bottom-controlled	h.	looping
d.	infinite	i.	InputBox
e.	accumulator	j.	Do Until

The process of repeating a set of instructions while a condition is true or until a condition is true

Objects that can be assigned a default value representing the most likely user input

Used to publish a program using ClickOnce Deployment

Items added to this kind of object during design phase are available for selection by the user during program execution

A variable that contains an accumulated value such as a running total

Loop that should be used when code is to be executed a known, exact number of times

Loop in which the body of the loop is executed until the condition becomes true

A loop that is always executed at least once

A loop that never ends

Identified in the code editor with a bullet to the left of the line number and highlighting of the code on that line

ANS: H PTS: 1 REF: 378

ANS: I PTS: 1 REF: 388

ANS: B PTS: 1 REF: 426

ANS: A PTS: 1 REF: 393

ANS: E PTS: 1 REF: 396

ANS: F PTS: 1 REF: 399

ANS: J PTS: 1 REF: 406

ANS: C PTS: 1 REF: 406

ANS: D PTS: 1 REF: 412

ANS: G PTS: 1 REF: 419

ESSAY

Explain what a compound operator is, and of what it consists.

ANS:

A compound operator allows you to add, subtract, multiple, divide, use modulus or exponents, or concatenate strings, storing the result in the same variable. An assignment statement that includes a compound operator begins with the variable that will contain the accumulated value, such as an accumulator or a counter, followed by the compound operator. A compound operator consists of an arithmetic operator and an equal sign. The last element in the assignment statement is the variable or literal containing the value to be used in the calculation

PTS: 1 REF: 396 TOP: Critical Thinking

How does a Do loop work? What is the difference between a Do While loop and a Do Until loop? A top-controlled loop and a bottom-controlled loop?

ANS:

In a Do loop, the body of the loop is executed while or until a condition is true or false. The Do loop uses a condition similar to an If…Then decision structure to determine whether it should continue looping. In this way you can use a Do loop to execute a body of statements an indefinite number of times.

Visual Basic 2010 provides two types of Do loops: the Do While loop and the Do Until loop. Both Do loops execute statements repeatedly until a specified condition becomes true or false. Each loop examines a condition to determine whether the condition is true. The Do While loop executes as long as the condition is true.

The Do Until loop executes until the condition becomes true.

Do loops are either top-controlled or bottom-controlled, depending on whether the condition is tested before the loop begins or after the body of the loop has executed one time. A top-controlled loop is tested before the loop is entered; the body of a top-controlled loop might not be executed at all because the condition being tested might be true before any processing in the loop occurs.

Bottom-controlled loops test the condition at the bottom of the loop, so the body of a bottom-controlled loop is executed at least once..

PTS: 1 REF: 405-406 TOP: Critical Thinking

Discuss what a breakpoint is and how to use it.

ANS:

A good way to collect information is to pause the execution of the code where a possible error could occur. One way to pause execution is to use breakpoints. Breakpoints are stop points placed in the code to tell the Visual Studio 2010 debugger where and when to pause the execution of the application. During this pause, the program is in break mode. While in break mode, you can examine the values in all variables that are within the scope of execution through the use of DataTips.

PTS: 1 REF: 417 TOP: Critical Thinking

CASE

Critical Thinking Questions

Case 6-1

Chris is trying to decide which kind of loop is the best loop for him to use to solve a couple of different programming challenges that he faces.

Chris knows the exact number of repetitions he needs the loop to execute. Which of the following is the best choice for him?

a. top-controlled Do While	c. bottom-controlled Do While
b. bottom-controlled Do Until	d. For…Next

ANS:

PTS: 1 REF: 417

Chris wants to guarantee that the instructions within the loop are executed one time regardless of the status of a condition. Which of the following should he use?

a. bottom-controlled Do Until	c. For…Next
b. top-controlled Do Until	d. top-controlled Do While

ANS:

PTS: 1 REF: 417

Critical Thinking Questions

Case 6-2

Robin thinks that she has a good handle on the use of compound operators but she wants to do a couple of sample problems just to make certain. In both of the problems below, Robin assumes that intResult = 24.

When Robin correctly calculates intResult -= 3, what value does she get?

a. 18	c. 72
b. 21	d. None of the above

ANS:

PTS: 1 REF: 397

When Robin correctly calculates intResult ^= 2, what value does she get?

a. 22	c. 48
b. 24	d. 576

ANS:

PTS: 1 REF: 397

hihi

Want to order fresh copy of the Sample Template Answers? online or do you need the old solutions for Sample Template, contact our customer support or talk to us to get the answers of it.

Not the Exact Question you were looking for? Post your question for instant answers.