v QUESTION 1 What do the calls to exit(...) do? When exit(0) and exit(1) are cal

ID: 3857902 • Letter: V

Question

QUESTION 1

What do the calls to exit(...) do? When exit(0) and exit(1) are called, what receives these values and what is done with them?

the exit() function stops the program. The value is passed to the operating system which uses it for an error code

the exit() function stops the program. The value is discarded.

the exit() function is obsolete. There is no longer any such function in the C++ libraries

The exit() function temporarily stops the program, and sends the argument to the operating system which uses it for an error code. The operating system restarts the program after fixing the error.

10 points

QUESTION 2

Which statement is incorrect?

Extensive use of global variables is NOT a satisfactory replacement for the difficulties of parameter passing with functions

It is legal to replace the prototype

double totalCost(int numberParam, double priceParam);

with the more terse, alternate form

double totalCost(int, double);

A variable declared outside any function is said to be a global variable

In C++ Boolean value are represented only with the int values 0 for false and 1 for true

10 points

QUESTION 3

Which statement is incorrect?

Consider two blocks, one within another. If an identifier is declared as a variable in the innermost of these two blocks, one can access this variable from the outer block

A variable declared within a function block is said to be local to the function

Consider two blocks, one within another. C++ allows an identifier to be declared as a variable in each of these blocks

A local variable is created in the execution stack

10 points

QUESTION 4

Which is incorrect?

C++ predefined functions

make C++ harder than necessary

must use #include for the proper header file

are usually provided with the C++ compiler

are usually provided in libraries

10 points

QUESTION 5

Where can you NOT declare a variable in a C++ program?

Within the block of a void function

Within the parameter list of a function definition

Within the argument list of a function call

Within a block nested within another block

10 points

QUESTION 6

Here is a small program. Which of the statements about the variables is INcorrect?

#include <iostream>

const double NUM = 2.9345358;

double num = 3;

double numTimes(int x);

int main( )

{

using namespace std;

int value;

cout << “Enter a value, I’ll multiply it by “

<< NUM << endl;

cin >> value;

cout << “You entered “ << value

<< “ NUM times this is “ << numTimes(value)

<< endl;

return 0;

}

double numTimes(int x)

{

double d;

d = NUM * x;

return d;

}

the line

doublenumTimes(int x); is a function definition

The variable x is a parameter in function numTimes

the variable value is an argument in a call to numTimes

The line return d; in the function numTimes is necessary

10 points

QUESTION 7

Before a variable in C++ is used, it must be

used in some expression

defined

initialized

contain only letters, digits and underscores

10 points

QUESTION 8

If this code fragment were executed in an otherwise correct and complete program, what would the output be?
int a = 3, b = 2, c = 5
if (a > b)
a = 4;
if ( b > c)
   a = 5;
   else
    a = 6;
cout << a << endl;

10 points

QUESTION 9

Which is a C++ keyword?

number_of_bars

total_weight

while

10 points

QUESTION 10

A l-value is

is designed for use by a left-handed person

an expression that can only be placed on the left of any operator such as +,*,/, etc.

assigned a value

can never have a value fetched from it

10 points

QUESTION 11

Any number with an exponent of zero is equal to

one.

zero.

itself.

ten.

10 points

QUESTION 12

Given the definition and code fragment:

int matrix[2][3];

int k = 0;

for(int i =0; i < 3; i++)

for (int j=0, j < 4; j++)

matrix[i][j] = k++;

The value of matrix[0][0] is

10 points

QUESTION 13

What is the output of the following code (assuming it is embedded in a correct and complete program)?

char letter[5] = {'o', 'k', 'c', 'e', 'g'};

for(int i = 4; i >= 0; i-- )

cout << letter[i];

cout << endl;

kceg followed by a character from an out of bounds access

ecko followed by a character from an out of bounds access

okceg

gecko

10 points

QUESTION 14

Are the following array initializations INcorrect?

int x[4] = {8, 7, 6, 5, 4};

int x[] = {8, 7, 6, 5, 4};

const int SIZE =4;

int x[SIZE];

int x[4] = {8, 7, 6};

10 points

QUESTION 15

In C++ array indices, that is subscript values, must be

positive

None is correct

Less than or equal to the declared size of the array

Non-negative, integery

10 points

QUESTION 16

If this code fragment were executed in an otherwise correct and complete program, what would the output be? .

int a = 3, b = 2, c = 5

if (a > b)

a = 4;

if ( b > c)

a = 5;

else

a = 6;

cout << a < endl;

10 points

QUESTION 17

Which of the following control structures requires curly braces?

if-else

while

switch

for

10 points

QUESTION 18

In distinguishing an expression as true or false, C++ sees which of the following as true?

true

Any non-zero value

10 points

QUESTION 19

Regarding the comma operator, which statement is incorrect?

ANSI C++ Standard specifies that expressions must be evaluated left to right

Expressions are evaluated in order defined by the compiler

Results in the value equal to the value of the first expression in the list

Is used to separate a list of expressions

10 points

QUESTION 20

Which of the following is NOT correct of the && operator?

It uses short circuit evaluation

It can have one operand

It has two operands

It returns true if both operands are true

the exit() function stops the program. The value is passed to the operating system which uses it for an error code

the exit() function stops the program. The value is discarded.

the exit() function is obsolete. There is no longer any such function in the C++ libraries

The exit() function temporarily stops the program, and sends the argument to the operating system which uses it for an error code. The operating system restarts the program after fixing the error.

Explanation / Answer

Question 1:-

The exit() function temporarily stops the program, and sends the argument to the operating system which uses it for an error code. The operating system restarts the program after fixing the error.

Question 2:-

In C++ Boolean value are represented only with the int values 0 for false and 1 for true

Question 3:-

Consider two blocks, one within another. If an identifier is declared as a variable in the innermost of these two blocks, one can access this variable from the outer block

Question 4:-

are usually provided in libraries

Question 5:-

within the arguement list of function call

Question 6:-

double numTime(int x);

Question 8:-

Question 9:-

while

Question 10:-

Question 11:-

one

Question 12:-

The value of matrix[0][0] = 0

Question 13:-

gecko

Question 14:-

int x[4]={8,7,6,5,4}

Question 15:-

None is correct

Question 16:-

6
Question 17:-

switch

Question 18 :-

any non zero value

Question 19:-

ANSI C++ standard specifies that expression must be evaluated left to right

Question 20 :

IT CAN HAVE ONE OPERAND

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