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CS2250

QuestionAnswer
Given that x = 2, y = 1, and z = 0, what will the following cout statement display? cout << "answer =" << (x || !y &&z) <<endl; answer=1
If the sub-expression on the left side of the || operator is true, the expression on the right side will not be checked. true
If you place a semicolon after the statement if (x < y) the compiler will interpret the semicolon as a null statement
In C++ the = operator indicates: assignment
The default section of a switch statement performs a similar task as the ________ portion of an if/else if statement. trailing else
The following code correctly determines whether x contains a value in the range of 0 through 100. if (x >= 0 && <= 100) false
When an if statement is placed within the conditionally-executed code of another if statement, this is known as: nesting
What is the value of the following expression? true && true false
Which of the following expressions will determine whether x is less than or equal to y? x <= y
Without this statement appearing in a switch construct, the program "falls through" all of the statements below the one with the matching case expression. break
You should be careful when using the equality operator to compare floating point values because of potential round-off errors. true
When a program lets the user know that an invalid choice has been made, this is known as: input invalidation
When a relational expression is false, it has the value ________. zero
Input values should always be checked for: appropriate range reasonableness division by zero, if division is taking place
Both of the following if statements perform the same operation. if (sales > 10000) commissionRate = 0.15; if (sales > 10000) commissionRate = 0.15; true
As a rule of style, when writing an if statement you should indent the conditionally-executed statements. true
when using the equality operator to compare integer values there will be potential round-off errors. false
variables need to be declared before they can be used false
when using the equality operator to compare integer values there will be potential round-off errors. false
variables need to be declared before they can be used false
A statement that starts with a # is called a comment false
The following code correctly determines whether x contains a value out of the range of 0 through 100. if (x < 0 || x> 100) true
An example of a secondary storage device is a hard drive true
Floating point constants are normally stored in memory as doubles true
The following code correctly determines whether x contains a value out of the range of 0 through 100. if (x < 0 || x> 100) true
An example of a secondary storage device is a hard drive true
_____________ represent storage locations in the computer's memory variable
If you use a C++ key word as an identifier, your program will compile, link, but not execute. false
Which of the following is not one of the five major components of a computer system? preprocessor
If you use a C++ key word as an identifier, your program will compile, link, but not execute. false
A file must be ________ before data can be written to or read from it. opened
Which of the following is not one of the five major components of a computer system? preprocessor
A file must be ________ before data can be written to or read from it. opened
A loop that is inside another loop is called: a nested loop
Assuming outFile is a file stream object and number is a variable, which statement writes the contents of number to the file associated with outFile? outfile << number;
Assuming outFile is a file stream object and number is a variable, which statement writes the contents of number to the file associated with outFile? outfile << number;
when using the equality operator to compare integer values there will be potential round-off errors. false
Look at the following statement. while (x ++ < 10) what will be executed first? <
variables need to be declared before they can be used false
If you want a user to enter exactly 20 values, which loop would be the best to use? for
A statement that starts with a # is called a comment false
In a for statement, this expression is executed only once. intialization
Floating point constants are normally stored in memory as doubles true
The do-while loop is considered a(n) ________ loop. post-test
If you want a user to enter exactly 20 values, which loop would be the best to use? for
The scope of a variable declared in a for loop's initialization expression always extends beyond the body of the loop. false
The following code correctly determines whether x contains a value out of the range of 0 through 100. if (x < 0 || x> 100) true
An example of a secondary storage device is a hard drive true
_____________ represent storage locations in the computer's memory variable
This statement may be used to stop a loop's current iteration and begin the next one. continue
If you use a C++ key word as an identifier, your program will compile, link, but not execute. false
You may nest while and do-while loops, but you may not nest for loops. false
Which of the following is not one of the five major components of a computer system? preprocessor
A file must be ________ before data can be written to or read from it. opened
This statement may be used to stop a loop's current iteration and begin the next one. continue
A loop that is inside another loop is called: a nested loop
You may nest while and do-while loops, but you may not nest for loops. false
Assuming outFile is a file stream object and number is a variable, which statement writes the contents of number to the file associated with outFile? outfile << number;
Look at the following statement. while (x ++ < 10) what will be executed first? <
In a for statement, this expression is executed only once. intialization
If you want a user to enter exactly 20 values, which loop would be the best to use? for
The scope of a variable declared in a for loop's initialization expression always extends beyond the body of the loop. false
The do-while loop is considered a(n) ________ loop. post-test
The while loop has two important parts: an expression that is tested for a true or false value, and: a statement or block that is repeated as long as the expression is true
This loop is a good choice when you know how many times you want the loop to iterate in advance of entering the loop. for
This statement causes a loop to terminate early. break
This statement may be used to stop a loop's current iteration and begin the next one. continue
You may nest while and do-while loops, but you may not nest for loops. false
You may not use the break and continue statements within the same set of nested loops. false
A ________ variable is declared outside all functions. global
A function ________ contains the statements that make up the function. defnition
A local variable and a global variable may not have the same name within the same program. false
Functions are ideal for use in menu-driven programs. When a user selects a menu item, the program can ________ the appropriate function. call
If a function does not have a prototype, default arguments may be specified in the function ________. header
In a function header, you must furnish: data type(s) of the parameters data type of the return value the name of function names of parameter variables
Local variables are initialized to zero by default. false
Look at the following function prototype. int myFunction(double); What is the data type of the function's parameter variable? double
It is not considered good programming practice to declare all of your variables globally. true
You may use the exit( ) function to terminate a program, regardless of which control mechanism is executing. true
This is a collection of statements that performs a specific task function
One reason for using functions is to break programs into manageable units, or modules. true
The value in a(n) ________ variable persists between function calls. static local
The value in this type of local variable persists between function calls. static
These types of arguments are passed to parameters automatically if no argument is provided in the function call. default
When a function is called, flow of control moves to the function's prototype. false
You must furnish an argument with a function call. false
Unlike regular variables, these can hold multiple values. array
To access an array element, use the array name and the element's: subscript
By using the same ________ you can build relationships between data stored in two or more arrays subscripts
A two-dimensional array can be viewed as ________ and ________. rows, columns
An array can store a group of values, but the values must be: the same data type
Subscript numbering in C++ begins with 0
Arrays may be ________ at the time they are ________. initialized, declared
Given the following declaration, where is 77 stored in the scores array? int scores[ ]={83, 62, 77, 97}; scores [2]
An array can easily be stepped through by using a: for loop
To pass an array as an argument to a function, pass the ________ of the array. name
A(n) ________ can be used to specify the starting values of an array. initialization list
The ________ is automatically appended to a character array when it is initialized with a string constant. null terminator
An array of string objects that will hold 5 names would be declared using which statement? string names[5];
It is ________ to pass an argument to a function that contains an individual array element, such as numbers[3]. legal in C++
What will the following code display? int numbers[ ] = {99, 87, 66, 55, 101 }; cout << numbers[3] << endl; 55
Assume array1 and array2 are the names of arrays. To assign the contents of array2 to array1, you would use the following statement. array1 = array2; false
When you pass an array as an argument to a function, the function can modify the contents of the array. true
If an array is partially initialized, the uninitialized elements will be set to zero. true
Each individual element of an array can be accessed by the array name and an element number, called a subscript true
An individual array element can be processed like any other type of C++ variable. true
Created by: mrsj1205