C# Chapter 6 Test

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Statement/Questions

True/False & Fill in the Blank

int sum = 0; int number = 0; while(number <10) { sum=sum+number; console.writeline(sum); } The statement above prints the values of 0-9 on separate lines

False

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int sum = 0; int number = 0; while(number <10) { sum=sum+number; console.writeline(sum); } The statement above produces seven random numbers

False

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The while statement is only type of loop construct that can be used to develop a sentinel-controlled loop

False

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Iteration is a technique used where a method calls itself repeatedly until it arrives at the solution

False

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Class diagrams show the data method and property members of a class

False

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The sentinel value is used as the operand in the conditional expression for an indefinite loop

True

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Unlike the sentinel-controlled loop, the variable used with a state-controlled loop differs from the variable used to store the data that is being processed

True

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If a numeric variable is being changed by a consistent amount with each iteration through the loop, the while statement is the best choice of loop constructs

False

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Windows applications use an event-driven model to manage the interaction between the user and the GUI by handling the repetition for you

True

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With nested loops, the outermost loop is always totally complete before the innermost loop is executed

False

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A state-controlled loop should be designed when you know the number of times the statement must be executed.

False

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In C# curly braces must be added to surround all loop bodies

False

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The do...while statement is posttest loop, which means that the conditional expression is tested before any of the statements in the body of the loop are performed.

True

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int sum=0 int number =1 while(number<100) { sum=sum+number; } The program above produces an infinite loop

True

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In order to use the messagebox.show() method, you need to not only add a reference to the namespace which includes the class, but also add a using directive to the program statements

True

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With while loops, if the conditional expression evaluates to true, the body of the loop is not performed; control transfers tot he statement following the loop

True

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To write a recursive solution, a base case needs to be identified

True

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C# performs automatic garbage collection once the loop is finished and releases any variable declared as part of the loop

True

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You often need to do a "prime the read" for counter controlled loops which means that you would input a value before going into the body of the loop

False

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An off-by-one error is common problem associated with counter-controlled loops where the loop body is performed one too many or one too few times

True

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int loop Variable =0; do { console.writeline("Count = {0:}", ++loopVariable); }while(loopVariable < 5); How many time will be loop body be executed if the conditional expression is changed to (loopVariable ==5)?

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for (int outer =0; outer < 2; outer ++) { for int inner =0; inner <3; inner ++) { Console.writeline("Outer:{0}\tInner: {1}", outer, inner); } } How many lines will be printed for the above nested loop?

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The only posttest loop structure available in C# is

do...while

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The loop control structure used to move through a collection (group of data items) that doesnt require you to increment a loop control variable or test the expression to determine when all data has been process is the ________ statement

foreach

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int loopVariable = 0; do { writeline("Count = {0}', ++loopVariable); }while(loopVariable <5); What will be printed during the first iteration though the loop?

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What is a requirement of the sentinel-controlled loop shared by counter-controlled loops?

The expression must exeluate to false in order for the loop to be executed.

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With the while loop, the body of the loop is _________.

performed as long as the conditional expression evaluates to true

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To "prime the read" with a loop, you place an input statement_________.

before the loop body

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You must tell the user what value to type to end the loop for ____.

sentinel-controlled loops

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int inner; for(int outer =0; outer < 3; outer++) { for(inner=1; inner <2; inner++) writeline("Outer: {0}\tInner:{1}", outer, inner); } The nested for statement above displays how many lines of output?

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In order to write a recursive solution ___.

the simplest case should be determined

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for int i =0; i <5; i++) write(i+"\t"); Given the code snippet above, how many times will the loop body be executed?

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Which of the following is NOT a keyword used to enable unconditional transfer of control to a different program statement?

While

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The most appropriate sentinel value that might be selected for month of the year is ___.

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int loopVariable= 0; do { writeline("Count ={0:}", ++loopVariable); }while (loopVariable <5); How many times will be loop body be executed?

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the conditional expression used with the for statement ___.

must evaluate to false in order for the loop body to be executed

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a flag-controlled loop is also called a

state-controlled loop

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int counter =0; while(counter <100) { writeline(counter) counter++ } Looking above, if the loop body was changed from count++; to counter +=5:, how many times would the loop body be executed?

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The event-driven model used create Windows applications

handles the repetition for you

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A method that calls itself repeadly until it arrives at the solution is an

recursive

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Inside the for statement, when you place a semicolon after the parentheses without anything to the left of it, it indicates that no statement or a(n) ____ statemetn is associated with the initialize portion.

null

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When one of the program statement included within the body of a loop is another loop, a(n) ___ loop is created

nested

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The ___ statement is a pretest form of loop which is considered a specialized form of the while statement and is usually associated with-controlled types of loops;

While

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The ____ method of the messagebox class displays a predefined dialog box that can contain text, captions for the title bar, special buttons, and icons.

Show()

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The only posttest loop structure available with C# is the ___ loop structure

do while

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A sentinel value is a(n) ___. It is a value that should not be processed.

extreme value

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if(int.TryParse(inStringValue, out integer

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