Preparation for Final Exam MCQ Quiz BIG - Попытка 1

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Question91

Баллов: 1

What should you do to free the memory after running this code?

char *a; a = new char[20];

Выберите один ответ.

	a. I don't know
	b. delete a;
	c. delete [] a;
	d. delete a[];
	e. no of these

Question92

Баллов: 1

All variables must be given a type when they are declared.

Ответ:

True False

Question93

Баллов: 1

Write one or more statements that perform the following task for and array called “fractions”. Print all the array elements using a for statement. Define the integer variable i as a control variable for the loop.

Выберите один ответ.

	a. for (i = 0; < arraySize; i++) cout << "fractions[" < i << "] = " << fractions[ i ] << endl;
	b. for (int i = 0; < arraySize; i++) cout << "fractions[" < arraySize << "] = " << fractions[arraySize ] << endl;
	c. no ideas
	d. for (int i = 0; < arraySize; i++) cout << "fractions[" < i << "] = " << fractions[ i ] << endl;

Question94

Баллов: 1

Storage-class specifier is a recommendation to the compiler to store a variable in one of the computer's registers.

Question95

Баллов: 1

In C++, it is possible to have various functions with the same name that operate on different types or numbers of arguments. This is called function ________.

Выберите один ответ.

	a. prototype
	b. copy
	c. duplicate
	d. overloading
	e. not sure

Question96

Баллов: 1

What is the output of the program?

#include<iostream>

usingnamespace std;

int main() {

char str[] = "de_dust";

for (int i=strlen(str)-1; i>=0; i--)

cout << str[i];

cout << endl;

return 0;

}

Выберите один ответ.

	a. sud_e
	b. sud_ed
	c. de_dust
	d. tsud_ed
	e. tsud_e

Question97

Баллов: 1

Which of the following accesses a variable in structure b?

Выберите один ответ.

	a. b-var;
	b. b->var;
	c. b>var;
	d. b.var;
	e. b>>var

Question98

Баллов: 1

If n=3, what will be the result of:

switch
{
case '3':
cout << "wow \n";
break;
case 3:
cout << "bab \n";
break;
default:
cout << "heh \n";
break;
}

Выберите один ответ.

	a. Compiler error
	b. heh
	c. wow
	d. Undefined behaviour
	e. bab

Question99

Баллов: 1

Assuming that nPtr points to the beginning of array numbers (the starting address of the array is at location 1002500 in memory), what address is referenced by nPtr + 8?

Выберите один ответ.

	a. The same as nPtr
	b. NULL
	c. The address is 1002500 + 8 * 8 = 1002564

Question100

Баллов: 1

Find the error(s) in the following code segment:
switch (n)
{

case 1:

cout << "The number is 1" << endl;

case 2:

cout << "The number is 2" << endl;
break;

default:

cout << "The number is not 1 or 2" << endl;
break;

}

Выберите один ответ.

	a. switch (n) { case 1: cout << "The number is 1" << endl; break; case 2: cout << "The number is 2" << endl; break; }
	b. switch (n) { case 1: cout << "The number is 1" << endl; break; case 2: cout << "The number is 2" << endl; break; default: cout << "The number is not 1 or 2" << endl; break; }
	c. switch (n) { case 1: cout << "The number is 1" << endl; case 2: cout << "The number is 2" << endl; default: cout << "The number is not 1 or 2" << endl; }

Midterm II

Review of attempt 1

Close this window

Started on	Tuesday, 7 December 2010, 05:37 PM
Completed on	Tuesday, 7 December 2010, 06:27 PM
Time taken	50 mins
Marks	29/40
Grade	72.5 out of a maximum of 100 (73%)

Question 1

Marks: 1

Use a stream manipulator such that, when integer values are output, the integer base for octal and hexadecimal values is displayed.

Choose one answer.

	a. cout << &showbase;
	b. cout << showbase;
	c. cout << Hshowbase;

Incorrect

Marks for this submission: 0/1.

Question 2

Marks: 1

What is the output of the program?

#include <iostream>
using namespace std;
int main() {
int n = 1;
while (n<5)
cout << ++n;
return 0;
}

Choose one answer.

	a. 234
	b. 12345
	c. 1234
	d. 123456
	e. 2345

Incorrect

Marks for this submission: 0/1.

Question 3

Marks: 1

Each parameter in a function header should specify both a and a .

Correct

Marks for this submission: 1/1.

Question 4

Marks: 1

What value gets printed by the program?

#include <iostream>

int foo(int x, int y) { return x+y;}

double foo(double x, double y) { return x+y; }

int main(int argc, char** argv)

{

double (*ptr)(int, int);

ptr = foo;

std::cout << ptr(3,8) << std::endl;

return 0;

}

Choose one answer.

	a. 11
	b. 8
	c. ill-formed
	d. 3

Correct

Marks for this submission: 1/1.

Question 5

Marks: 1

If ASCII code of 'd' is 100, what is the ASCII code of 'a'?

Choose one answer.

	a. 103
	b. 65
	c. 68
	d. 97
	e. 96

Correct

Marks for this submission: 1/1.

Question 6

Marks: 1

What is the output of the program?

#include<iostream>

usingnamespace std;

int main() {

int *x = newint[10];

for (int i=0; i<10; i++)

x[i] = i+5;

int *y = x;

y++;

cout << *(y+1)/2 << endl;

return 0;

}

Choose one answer.

	a. 2
	b. 3
	c. 3.5
	d. 7
	e. 4

Correct

Marks for this submission: 1/1.

Question 7

Marks: 1

What is the output of the program?

#include<iostream>

usingnamespace std;

int main() {

char *a = "matador";

cout << "hello " << a[0] << a[5] << a[2] << a[5];

return 0;

}

Choose one answer.

	a. hello
	b. hello matadorortadoror
	c. moto hello
	d. hello matador
	e. hello moto

Correct

Marks for this submission: 1/1.

Question 8

Marks: 1

What value gets printed by the program?

#include <iostream>

int foo(int x, int y)
{
return x+y;
}

int foo(const int x, const int y)
{
return x+y+1;
}

int main(int argc, char** argv)
{
const int x = 3;
const int y = 2;

std::cout << foo(x,y) << std::endl;

return 0;
}

Choose one answer.

	a. 6
	b. 3
	c. ill-formed
	d. 5
	e. undefined

Correct

Marks for this submission: 1/1.

Question 9

Marks: 1

Write a C++ statement or a set of C++ statements to print the value 333.546372 in a field width of 15 characters with precisions of 1, 2 and 3. Print each number on the same line. Left-justify each number in its field.

Choose one answer.

	a. cout << fixed << left << setprecision(1) << 333.546372; << setprecision(2) << 333.546372; << setprecision(3) << 333.546372; << endl;
	b. cout << fixed << left << setprecision(1) << setw(15) << 333.546372 << setprecision(2) << setw(15) << 333.546372 << setprecision(3) << setw(15) << 333.546372 << endl;
	c. cout << fixed << left << setw(15) << 333.546372 << setw(15) << 333.546372 << setw(15) << 333.546372 << endl;
	d. cin << fixed << left << setprecision(1) << setw(15) << 333.546372 << setprecision(2) << setw(15) << 333.546372 << setprecision(3) << setw(15) << 333.546372 << endl;

Correct

Marks for this submission: 1/1.

Question 10

Marks: 1

Which follows the case statement?

Choose one answer.

	a.::
	b. -
	c. A newline
	d.;
	e.:

Incorrect

Marks for this submission: 0/1.

Question 11

Marks: 1

The of an identifier is the portion of the program in which the identifier can be used.

Correct

Marks for this submission: 1/1.

Question 12

Marks: 1

Find the error in the following program segment. Assume the following declarations and statements:
int *zPtr; // zPtr will reference array z
int *aPtr = 0;
void *sPtr = 0;
int number;
int z[ 5 ] = { 1, 2, 3, 4, 5 };

// assign array element 2 (the value 3) to number
number = *zPtr[ 2 ];

Choose one answer.

	a. number = &zPtr[ 2 ];
	b. number = zPtr[ 2 ];
	c. number = *zPtr(2);

Correct

Marks for this submission: 1/1.

Question 13

Marks: 1

++zPtr;

Choose one answer.

	a. zPtr = z; ++zPtr;
	b. no errors
	c. zPtr++;

Correct

Marks for this submission: 1/1.

Question 14

Marks: 1

A pointer that is declared to be of type void * can be dereferenced

Answer:

True False

Correct

Marks for this submission: 1/1.

Question 15

Marks: 1

Find the error in the following program segment:
int sum(int x, int y)
{
int result;
result = x + y;
}

Choose one answer.

	a. not sure
	b. int sum(int x, int y) { return x + y; }
	c. all variants are correct
	d. int sum(int x, int y) { result x + y; }
	e. result sum(int x, int y) { int result; result = x + y; }

Correct

Marks for this submission: 1/1.

Question 16

Marks: 1

If the variable number is not equal to 7, print "The variable number is not equal to 7"

Choose one answer.

	a. if (number = 7) std::cout << "The variable number is not equal to 7\n";
	b. if (number == 7) std::cout << "The variable number is not equal to 7\n";
	c. if (number!= 7) std::cout << "The variable number is not equal to 7\n";
	d. if (number < > 7) std::cout << "The variable number is not equal to 7\n";
	e. if (number >< 7) std::cout << "The variable number is not equal to 7\n";

Correct

Marks for this submission: 1/1.

Question 17

Marks: 1

The statement in a called function passes the value of an expression back to the calling function

Correct

Marks for this submission: 1/1.

Question 18

Marks: 1

If the variable number is not equal to 7, print "The variable number is not equal to 7".

Choose one answer.

	a. if (number >< 7) std::cout << "The variable number is not equal to 7\n";
	b. if (number == 7) std::cout << "The variable number is not equal to 7\n";
	c. if (number!= 7) std::cout << "The variable number is not equal to 7\n";
	d. if (number = 7) std::cout << "The variable number is not equal to 7\n";
	e. if (number < > 7) std::cout << "The variable number is not equal to 7\n";

Correct

Marks for this submission: 1/1.

Question 19

Marks: 1

The address operator & can be applied only to constants and to expressions

Answer:

True False

Correct

Marks for this submission: 1/1.

Question 20

Marks: 1

What is the output of the program?

#include <iostream>
using namespace std;
int main() {
int n = 1;
while (n<=5)
cout << n++;
return 0;
}

Choose one answer.

	a. 123456
	b. 1234
	c. 234
	d. 12345
	e. 2345

Incorrect

Marks for this submission: 0/1.

Question 21

Marks: 1

Which functions will every class contain?

Choose one answer.

	a. Destructor
	b. friend function
	c. None
	d. Both a constructor and a destructor
	e. Constructor

Incorrect

Marks for this submission: 0/1.

Question 22

Marks: 1

The stream manipulators ___________, __________ and ___________ specify that integers should be displayed in octal, hexadecimal and decimal formats, respectively

Choose one answer.

	a. oct, hex and dec
	b. O, H and D
	c. octi, hexi and deci

Correct

Marks for this submission: 1/1.

Question 23

Marks: 1

If there are fewer initializers in an initializer list than the number of elements in the array, the remaining elements are initialized to the last value in the initializer list

Choose one answer.

	a. true
	b. it depends on compilator
	c. it depends of the type of an array
	d. false

Correct

Marks for this submission: 1/1.

Question 24

Marks: 1

Is the following piece of code valid?

#include <iostream>
using namespace std;

int main(){

int *steve;
steve = &steve;

return 0;
}

Answer:

True False

Incorrect

Marks for this submission: 0/1.

Question 25

Marks: 1

What will be the result of: cout << (5 << 3);?

Choose one answer.

	a. Compiler error
	b. I don t know
	c. 35
	d. 40
	e. 53

Incorrect

Marks for this submission: 0/1.

Question 26

Marks: 1

Repeating a set of instructions a specific number of times is called repetition.

Correct

Marks for this submission: 1/1.

Question 27

Marks: 1

Find the error(s) in the following and correct it (them).
Assume the following prototype is declared in class Employee:
int Employee(const char *, const char *);

Choose one answer.

	a. Employee(const char, const char);
	b. Employee(const char , const char );
	c. int Employee(const char , const char );

Incorrect

Marks for this submission: 0/1.

Question 28

Marks: 1

A variable declared outside any block or function is a variable.

Correct

Marks for this submission: 1/1.

Question 29

Marks: 1

Which of the statements creates a dynamic array of type double and size n?

Choose one answer.

	a. double arr = new double[n];
	b. double arr[n];
	c. double *arr = new double[n];
	d. int arr = new int[n];
	e. float *arr = new float[n];

Correct

Marks for this submission: 1/1.

Question 30

Marks: 1

What is the output of the program?

#include <iostream>
using namespace std;
int main() {
int a = 17;
if (a<10) {
cout << "A";
}
if (a%17==0) {
cout << "B";
} else {
cout << "C";
}
cout << endl;
return 0;
}

Choose one answer.

	a. C
	b. A
	c. AB
	d. AC
	e. B

Correct

Marks for this submission: 1/1.

Question 31

Marks: 1

Which of the following accesses a variable in structure b?

Choose one answer.

	a. b>>var
	b. b-var;
	c. b.var;
	d. b->var;
	e. b>var;

Correct

Marks for this submission: 1/1.

Question 32

Marks: 1

What value does foo print out?
#include <iostream>
const int SIZE = 5;
struct tester
{
void foo()
{
std::cout << SIZE << std::endl;
}

enum
{
SIZE = 3
};
};

int main(int argc, char** argv)
{
tester t;
t.foo();
return 0;
}

Choose one answer.

	a. code is incorrect
	b. 3
	c. 8
	d. 5
	e. undefined

Correct

Marks for this submission: 1/1.

Question 33

Marks: 1

Identify and correct the errors in the following code:

while (c <= 5)
{

product *= c;
c++;

Choose one answer.

	a. while (c <= 5) { product *= c; c++; }
	b. while (c <= 5) { product *= c; c++ }
	c. while (c <= 5); { product *= c; c++;

Correct

Marks for this submission: 1/1.

Question 34

Marks: 1

Every function's body is delimited by left and right braces ({ and }).

Answer:

True False

Incorrect

Marks for this submission: 0/1.

Question 35

Marks: 1

What is the output of the program?
#include <iostream>
using namespace std;
int main() {
int a = 17;
if (a>10) {
cout << "A";
}
if (a%17==0) {
cout << "B";
} else {
cout << "C";
}
cout << endl;
return 0;
}

Choose one answer.

	a. B
	b. AB
	c. C
	d. AC
	e. A

Incorrect

Marks for this submission: 0/1.

Question 36

Marks: 1

Which of the variable definitions below, which ones have external linkage and can be accessed from another translation unit?
int w = 1;
static int x = 2;
const int y = 3;
extern const int z = 4;

int main(int argc, char** argv)
{
return 0;
}

Choose one answer.

	a. y and z
	b. w, y and z
	c. none
	d. w, x, y and z
	e. w and z

Incorrect

Marks for this submission: 0/1.

Question 37

Marks: 1

Find the error(s) in the following code segment:
switch (n)
{

case 1:

cout << "The number is 1" << endl;

case 2:

cout << "The number is 2" << endl;
break;

default:

cout << "The number is not 1 or 2" << endl;
break;

}

Choose one answer.

	a. switch (n) { case 1: cout << "The number is 1" << endl; case 2: cout << "The number is 2" << endl; default: cout << "The number is not 1 or 2" << endl; }
	b. switch (n) { case 1: cout << "The number is 1" << endl; break; case 2: cout << "The number is 2" << endl; break; default: cout << "The number is not 1 or 2" << endl; break; }
	c. switch (n) { case 1: cout << "The number is 1" << endl; break; case 2: cout << "The number is 2" << endl; break; }

Correct

Marks for this submission: 1/1.

Question 38

Marks: 1

When does the code block following while(x<100) execute?

Choose one answer.

	a. While it wishes
	b. When x is equal to one hundred
	c. Infinite loop
	d. When x is less than one hundred
	e. When x is greater than one hundred

Correct

Marks for this submission: 1/1.

Question 39

Marks: 1

Which of the following is a properly defined struct?

Choose one answer.

	a. struct a_struct int a;
	b. struct a_struct {int a;}
	c. struct {int a;}
	d. struct a_struct {int a;};
	e. Struct a_struct {int a;};

Correct

Marks for this submission: 1/1.

Question 40

Marks: 1

What is the output of the program?

#include <iostream>

using namespace std;

int main() {

int a = 1;

do {
cout << a;
a+=2;
} while (a<=5);

return 0;
}

Choose one answer.

	a. 13
	b. 124
	c. 12345
	d. 135
	e. 1234

Correct

Marks for this submission: 1/1.

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Midterm II

Review of attempt 1

Close this window

Started on	Tuesday, 7 December 2010, 05:38 PM
Completed on	Tuesday, 7 December 2010, 06:28 PM
Time taken	50 mins 1 sec
Marks	12.67/40
Grade	31.67 out of a maximum of 100 (32%)

Question 1

Marks: 1

What is required to avoid falling through from one case to the next?

Choose one answer.

	a. end;
	b. A semicolon.
	c. break;
	d. Stop;
	e. continue;

Incorrect

Marks for this submission: 0/1.

Question 2

Marks: 1

Find the error in the following program segment:
int sum(int n)
{
if (n == 0)
return 0;
else
n + sum(n - 1);
}

Choose one answer.

	a. All variants are correct
	b. not sure
	c. int sum(int n) { if (n == 0) return 0; else return n + sum(n - 1); }
	d. int sum(int n) { if (n == 0) result 0; else result n + sum(n - 1); }
	e. int sum(int n) { if (n == 0) return=0; else return=n + sum(n - 1); }

Incorrect

Marks for this submission: 0/1.

Question 3

Marks: 1

// use pointer to get first value of array
number = zPtr;

Choose one answer.

	a. no errors
	b. number = &zPtr;
	c. number = *zPtr;

Incorrect

Marks for this submission: 0/1.

Question 4

Marks: 1

What should get printed in the program below?

#include <iostream>
using namespace std;

class foo{
public:
foo(): z(x+1), y(2), x(3)
{
cout << "z: " << z << endl;
}
private:
int x;
int y;
int z;
};

int main(int argc, char** argv){
foo f;
return 0;
}

Choose one answer.

	a. 2
	b. 4
	c. 1
	d. 3

Correct

Marks for this submission: 1/1.

Question 5

Marks: 1

What does the program below output?

#include<iostream>

usingnamespace std;

int main() {

int a[6] = {3,5,1,6,8,2};

int idx = 0;

for (int i=0; i<6; i++)

if (a[idx]<a[i])

idx = i;

cout << a[idx] << endl;

return 0;

}

Choose one answer.

	a. 8
	b. 1440
	c. 25
	d. None of the given answers.
	e. 1

Incorrect

Marks for this submission: 0/1.

Question 6

Marks: 1

A selection sort application would take approximately ________ times as long to run on a 128-element vector as on a 32-element vector.

Choose one answer.

	a. 16, because an O(n2) algorithm takes 16 times as long to sort four times as much information
	b. 32, because an O(n2) algorithm takes 32 times as long to sort four times as much information

Incorrect

Marks for this submission: 0/1.

Question 7

Marks: 1

++z;

Choose one answer.

	a. ++*z;
	b. ++&z;
	c. ++z[4];

Incorrect

Marks for this submission: 0/1.

Question 8

Marks: 1

What is the output of the program?

#include <iostream>
using namespace std;
int main() {
int a = 17;
if (a>10) {
cout << "A";
}
if (a%10==0) {
cout << "B";
} else {
cout << "C";
}
cout << endl;
return 0;
}

Choose one answer.

	a. A
	b. AC
	c. B
	d. AB
	e. C

Incorrect

Marks for this submission: 0/1.

Question 9

Marks: 1

What is the output of the program?
#include <iostream>
using namespace std;
int main() {
int a = 10;
for (a=1; a<81; a*=3)
cout << a << " ";
cout << endl;
return 0;
}

Choose one answer.

	a. 1 3 9 27 81
	b. 1 3 6 9 12
	c. 1 3 27 81
	d. 10 30
	e. 1 3 9 27

Incorrect

Marks for this submission: 0/1.

Question 10

Marks: 1

What will be output?

#include <iostream>
using namespace std;

void function1(int *a){

cout << *(a + 1) << " " << *(a + 9);
}

int main() {

int arr[] = {9,8,7,6,5,4,3,2,1,0};
function1(arr);
return 0;
}

Choose one answer.

	a. 9 1
	b. 8 1
	c. 8 0
	d. 9 2

Incorrect

Marks for this submission: 0/1.

Question 11

Marks: 1

If there are fewer initializers in an initializer list than the number of elements in the array, the remaining elements are initialized to the last value in the initializer list

Choose one answer.