Csc Midterm 2

Front 1

Main memory is an ordered sequence of items, called ____.

pixels

registers

memory cells

addresses

Back 1

memory cells

Front 2

Which of the following expressions correctly determines that x is greater than 10 and less than 20?

10 < x < 20

(10 < x < 20)

10 < x && x < 20

10 < x || x < 20

Back 2

10 < x && x < 20

Front 3

The device that stores information permanently (unless the device becomes unusable or you change the information by rewriting it) is called primary storage.

Back 3

false

Front 4

Choose the output of the following C++ statement

:cout << "Sunny " << '\n' << "Day " << endl;

Sunny \nDay

Sunny \nDay endl

Sunny

Day

Sunny \nDay

Back 4

Sunny

Day

Front 5

The statement: return 37, y, 2 * 3; returns the value ____.

a. 2

b. 6

c. y

d. 3

Back 5

b. 6

Front 6

C++ programs have always been portable from one compiler to another.

Back 6

false

Front 7

What is the output of the following code?

char lastInitial = 'S';

switch (lastInitial)

section 2

section 3

section 4

section 5

Back 7

selection 5

Front 8

Suppose that x = 55.68, y = 476.859, and z = 23.8216. What is the output of the following statements?

cout << fixed << showpoint;

cout << setprecision(3);

cout << x << ' ' << y << ' ' << setprecision(2) << z << endl;

55.680 476.859 23.82

55.690 476.860 23.82

55.680 476.860 23.82

55.680 476.859 23.821

Back 8

55.680 476.859 23.82

Front 9

Suppose that x and y are int variables. Which of the following is a valid input statement?

cin >> x >> cin >> y;

cin >> x >> y;

cin << x << y;

cout << x << y;

Back 9

cin >> x >> y;

Front 10

Suppose that x is an int variable, ch is a char variable, and the input is:

276.

Choose the values after the following statement executes:

cin >> ch >> x;

ch = '2', x = 276

ch = '276', x = '.'

ch = ' ', x = 276

ch = 'b', x = 76

Back 10

ch = '276', x = '.'

Front 11

Suppose x is 5 and y is 7. Choose the value of the following expression:

(x != 7) && (x <= y)

false

true

0

null

Back 11

true

Front 12

Which of the following function prototypes is valid?

a. funcExp(int x, float v){};

b. int funcExp(x);

c. funcExp(void);

d. int funcExp(int x, float v);

Back 12

d. int funcExp(int x, float v);

Front 13

Suppose that alpha and beta are int variables. The statement alpha = beta++; is equivalent to the statement(s) ____.

alpha = 1 + beta;

alpha = alpha + beta;

alpha = beta;

beta = beta + 1;

beta = beta + 1

;alpha = beta;

Back 13

alpha = beta;beta = beta + 1;

Front 14

Assume you have three int variables: x = 2, y = 6, and z. Choose the value of z in the following expression: z = (y / x > 0) ? x : y;.

2

3

4

6

Back 14

2

Front 15

Consider the following statements:

string str = "ABCDEFD";

string::size_type position

;After the statement position = str.find('D'); executes, the value of position is ____.

3

4

6

7

Back 15

3

Front 16

Which of the following loops does not have an entry condition?

EOF-controlled while loop

sentinel-controlled while loop

do...while loop

for loop

Back 16

do...while loop

Front 17

The ____ monitors the overall activity of the computer and provides services.

central processing unit

operating system

arithmetic logic

unitcontrol unit

Back 17

operating system

Front 18

____ represent information with a sequence of 0s and 1s.

Analog signals

Application programs

Digital signals

System programs

Back 18

Digital signals

Front 19

The digit 0 or 1 is called a binary digit, or ____.

bit

bytecode

Unicode

hexcode

Back 19

bit

Front 20

In C++, you can use a(n) ____________________ to instruct a program to mark those memory locations in which data is fixed throughout program execution.

Back 20

constant

Front 21

The standard header file for the abs(x)function is ____.

ionput

cmath

cstdlib

cctype

Back 21

cmath

Front 22

The control variable in a flag-controlled while loop is a bool variable.

Back 22

true

Front 23

Suppose that x = 1565.683, y = 85.78, and z = 123.982. What is the output of the following statements?

cout << fixed << showpoint;

cout << setprecision(3) << x << ' ';

cout << setprecision(4) << y << ' ' << setprecision(2) << z << endl;

1565.683 85.8000 123.98

1565.680 85.8000 123.98

1565.683 85.7800 123.98

1565.683 85.780 123.980

Back 23

1565.683 85.7800 123.98

Front 24

A program called a(n) ____ translates instructions written in high-level languages into machine code.

assembler

decoder

compiler

linker

Back 24

compiler

Front 25

A sequence of eight bits is called a ____.

binary digit

byte

character

double

Back 25

byte

Front 26

Suppose that alpha and beta are int variables and alpha = 5 and beta = 10. After the statement alpha *= beta; executes, ____.

alpha = 5

alpha = 10

alpha = 50

alpha = 50.0

Back 26

alpha = 50

Front 27

The programming language C++ was designed by Bjarne Stroustrup at Bell Laboratories in the early ____.

1960s

1970s

1980s

1990s

Back 27

1980s

Front 28

The data type string has a named constant, ____, associated with it.

string::size

string::size_type

string::pos

string::npos

Back 28

string::npos

Front 29

In a C++ program, statements that begin with the symbol # are called ____________________ directives.

Back 29

preprocessor

Front 30

Suppose that x is an int variable, y is a double variable and ch is a char variable and the input is:

15A 73.2

Choose the values after the following statement executes:

cin >> x >> ch >> y;

x = 15, ch = 'A',y = 73.2

x = 15, ch = 'A',y = 73.0

x = 15, ch = 'a', y = 73.0

This statement results in an error because there is no space between 15 and A.

Back 30

x = 15, ch = 'A',y = 73.2

Front 31

What is the output of the following C++ code?

count = 1;

num = 25;

while (count < 25)

{

num = num - 1;

count++;

}

cout << count << " " << num << endl;

24 0

24 1

25 0

25 1

Back 31

25 1

Front 32

Suppose str = "xyzw";. After the statement str[2] = 'Y'; The value of str is "____".

xyzw

xYzw

xyYw

xzYw

Back 32

xyYw

Front 33

The operators != and == have the same order of precedence.

Back 33

true

Front 34

In C++, a function prototype is the function heading without the body of the function.

Back 34

true

Front 35

Suppose that sum is an int variable. The statement sum += 7; is equivalent to the statement sum = sum + 7;

Back 35

true

Front 36

The ASCII data set consists of ____________________ characters.

Back 36

128

Front 37

A loop ____________________ is a set of statements that remains true each time the loop body is executed.

Back 37

invariant

Front 38

In the C++ statement,

cin.get(u);

u must be a variable of type ____________________.

Back 38

char

Front 39

In a C++ program, one and two are double variables and input values are 10.5 and 30.6. After the statement cin >> one >> two; executes, ____.

one = 10.5, two = 10.5

one = 10.5, two = 30.6

one = 30.6, two = 30.6

one = 11, two = 31

Back 39

one = 10.5, two = 30.6

Front 40

In C++, both ! and != are relational operators.

Back 40

false

Front 41

If the expression in an assert statement evaluates to true, the program terminates.

Back 41

false

Front 42

A variable listed in a header is known as a(n) ____ parameter.

a. local

b. function

c. actual

d. formal

Back 42

formal

Front 43

A sequence of 0s and 1s is sometimes referred to as ____________________ code.

Back 43

binary

Front 44

What is the value of x after the following statements execute?

int x = 5;

int y = 30;

do x = x * 2;

while (x < y);

5

10

20

40

Back 44

40

Front 45

Which of the following statements generates a random number between 0 and 50?

srand(time(0));num = rand() % 50;

srand(time(10));num = rand()/50;

srand(time(0));num = rand()50;

srand(time(10));num = rand() % 50;

Back 45

srand(time(0));num = rand() % 50;

Front 46

What is the output of the following code?

if (6 > 8)

{

cout << " ** " << endl ;

cout << "****" << endl;

}

else if (9 == 4) cout << "***" << endl;

else cout << "*" << endl;

*

**

***

****

Back 46

*

Front 47

Main memory is called ____.

Back 47

random access memory

Front 48

A do...while loop is a(n) ____________________ loop, since the loop condition is evaluated after executing the body of the loop.

Back 48

posttest

Front 49

You can disable the manipulator left by using the stream function ____________________.

Back 49

unsetf

Front 50

The ____________________ statement is typically used for two purposes:

• To exit early from a loop.

• To skip the remainder of a switch structure.

Back 50

break

Front 51

Which of the following statements is used to simplify the accessing of all globalType namespace members?

using globalType;

using namespace globalType:all;

using namespace globalType::all;

using namespace globalType;

Back 51

using namespace globalType;

Front 52

What is the output of the following code?

char lastInitial = 'A';

Back 52

section 1

Front 53

In the case of the sentinel-controlled while loop, the first item is read before the while loop is entered.

Back 53

true

Front 54

What is the output of the following code?

enum courses {ALGEBRA, BASIC, PASCAL, PHILOSOPHY, ANALYSIS};

courses registered;

registered = ALGEBRA;

cout << registered << endl;

ALGEBRA

0

1

"ALGEBRA"

Back 54

0

Front 55

The string expression strVar.____________________ deletes n characters from strVar starting at position pos.

Back 55

erase(pos,n)

Front 56

To output results correctly, the switch structure must include a(n) ____________________ statement after each cout statement, except the last cout statement.

Back 56

break

Front 57

Which of the following statements creates an anonymous type?

enum grades {A, B, C, D, F};

enum grades {};

enum {};

enum {A, B, C, D, F} grades;

Back 57

enum {A, B, C, D, F} grades;

Front 58

C++ has a special name for the data types istream and ostream. They are called ____________________.

Back 58

classes

Front 59

A program that loads an executable program into main memory is called a(n) ____.

compiler

loader

linker

assembler

Back 59

loader

Front 60

The value of the expression 6 < 5 || 'g' > 'a' && 7 < 4 is ____________________.

Back 60

false

Front 61

The maximum number of significant digits in values of the double type is 15.

Back 61

true

Front 62

The escape sequence \r moves the insertion point to the beginning of the next line.

Back 62

false

Front 63

Once you write and properly debug a function, you can use it in the program (or different programs) again and again without having to rewrite the same code repeatedly.

Back 63

true

Front 64

If input failure occurs in a C++ program, the program terminates immediately and displays an error message.

Back 64

false

Front 65

Which of the following is the newline character?

Back 65

/n

Front 66

A(n) ____________________ is a sequence of zero or more characters.

Back 66

string

Front 67

The following statement creates an anonymous type:

enum {1ST, 2ND, 3RD, 4TH} places;

Back 67

false

Front 68

In an output statement, each occurrence of endl advances the cursor to the end of the current line on an output device.

Back 68

false

Front 69

In object-oriented design, the first step in the problem-solving process is to identify the components called ____________________, which form the basis of the solution, and to determine how they interact with one another.

Back 69

objects

Front 70

____________________ signals represent information with a sequence of 0s and 1s.

Back 70

digital

Front 71

The string expression strVar.____________________ returns the index of the first occurrence at or after pos where str is found in strVar.

Back 71

find(str, pos);

Front 72

The expression static_cast(6.9) + static_cast(7.9) evaluates to ____.

13

14

14.8

15

Back 72

13

Front 73

The ____ rules of a programming language tell you which statements are legal, or accepted by the programming language.

semantic

logical

syntax

grammatical

Back 73

syntax

Front 74

The following function heading in a C++ program is valid:

int funcExp(int u, char v, float g)

Back 74

true

Front 75

On some compilers, the statements cin >> fixed; and cin >> scientific; might not work. In this case, you can use the statement ____________________ in place of cin >> fixed;.

Back 75

cin.setf(ios::fixed);