CSC 155 Exam MCQs

CSC 155 Exam MCQs

Question 1
1. Main memory is called ____.
read only memory

random access memory

read and write memory

random read only memory

3 points
Question 2
1. The ____ is the brain of the computer and the single most expensive piece of hardware in your personal computer.

MM

ROM

RAM

CPU

3 points
Question 3
1. The ____ carries out all arithmetic and logical operations.

IR

ALU

CU

PC

3 points
Question 4
1. The ____ holds the instruction currently being executed.

CU

IR

PC

ALU

3 points
Question 5
1. When the power is switched off, everything in ____ is lost.

main memory

secondary storage

hard disks

floppy disks

3 points
Question 6
1. ____ programs perform a specific task.

Application

System

Operating

Service

3 points
Question 7
1. The ____ monitors the overall activity of the computer and provides services.

Central Processing Unit

operating system

arithmetic logic unit

control unit

3 points
Question 8
1. Which of the following is NOT an output device?

monitor

printer

CPU

secondary storage

3 points
Question 9
1. ____ represent information with a sequence of 0s and 1s.

Analog signals

Application programs

Digital signals

System programs

3 points
Question 10
1. A sequence of eight bits is called a ____.

binary digit

byte

character

double

3 points
Question 11
1. The digit 0 or 1 is called a binary digit, or ____.

bit

bytecode

Unicode

hexcode

3 points
Question 12
1. The term GB refers to ____.

giant byte

gigabyte

group byte

great byte

3 points
Question 13
1. ____ consists of 65,536 characters.

ASCII-8

ASCII

Unicode

EBCDIC

3 points
Question 14
1. A program called a(n) ____ translates instructions written in high-level languages into machine code.

assembler

decoder

compiler

linker

3 points
Question 15
1. A program called a(n) ____ combines the object program with the programs from libraries.

assembler

decoder

linker

compiler

3 points
Question 16
1. Consider the following C++ program.

#include <iostream>
using namespace std;

int main()
{
cout << “Hello World ”
return 0;
}

In the cout statement, the missing semicolon in the code above will be caught by the ____.

compiler

editor

assembler

control unit

3 points
Question 17
1. A program that loads an executable program into main memory is called a(n) ____.

compiler

loader

linker

assembler

3 points
Question 18
1. A step-by-step problem-solving process in which a solution is arrived at in a finite amount of time is called a(n) ____.

algorithm

linker

analysis

design

3 points
Question 19
1. To develop a program to solve a problem, you start by ____.

analyzing the problem

implementing the solution in C++

designing the algorithm

entering the solution into a computer system

3 points
Question 20
1. In C++, the mechanism that allows you to combine data and operations on the data into a single unit is called a(n) ____.

object

class

function

algorithm

3 points
Question 21
1. Which of the following is a legal identifier?

program!

program_1

1program

program 1

3 points
Question 22
1. All of the following are examples of integral data types EXCEPT ____.

int

char

double

short

3 points
Question 23
1. Which of the following is a valid char value?

-129

-128

128

129

3 points
Question 24
1. The value of the expression 17 % 7 is ____.

1

2

3

4

3 points
Question 25
1. The expression static_cast<int>(9.9) evaluates to ____.

9

10

9.9

9.0

3 points
Question 26
1. The length of the string “computer science” is ____.

14

15

16

18

3 points
Question 27
1. Suppose that count is an int variable and count = 1. After the statement count++; executes, the value of count is ____.

1

2

3

4

3 points
Question 28
1. Suppose that alpha and beta are int variables. The statement alpha = –beta; is equivalent to the statement(s) ____.

alpha = 1 – beta;

alpha = beta – 1;

beta = beta – 1;
alpha = beta;

alpha = beta;
beta = beta – 1;

3 points
Question 29
1. 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;

3 points
Question 30
1. Suppose that alpha and beta are int variables. The statement alpha = ++beta; is equivalent to the statement(s) ____.

beta = beta + 1;
alpha = beta;

alpha = beta;
beta = beta + 1;

alpha = alpha + beta;

alpha = beta + 1;

3 points
Question 31
1. Choose the output of the following C++ statement:
cout << “Sunny ” << ‘n’ << “Day ” << endl;

Sunny nDay

Sunny nDay endl

Sunny
Day

Sunny n
Day

3 points
Question 32
1. Which of the following is the new line character?

r

n

l

b

3 points
Question 33
1. Consider the following code.

// Insertion Point 1

using namespace std;
const float PI = 3.14;

int main()
{
//Insertion Point 2

float r = 2.0;
float area;
area = PI * r * r;

cout << “Area = ” << area <<endl;
return 0;
}
// Insertion Point 3

In this code, where does the include statement belong?

Insertion Point 1

Insertion Point 2

Insertion Point 3

Anywhere in the program

3 points
Question 34
1. ____ are executable statements that inform the user what to do.

Variables

Prompt lines

Named constants

Expressions

3 points
Question 35
1. The declaration int a, b, c; is equivalent to which of the following?

inta , b, c;

int a,b,c;

int abc;

int a b c;

3 points
Question 36
1. Suppose that sum and num are int variables and sum = 5 and num = 10. After the statement sum += num executes, ____.

sum = 0

sum = 5

sum = 10

sum = 15

3 points
Question 37
1. Suppose that alpha is an int variable and ch is a char variable and the input is:

17 A

What are the values after the following statements execute?

cin >> alpha;
cin >> ch;

alpha = 17, ch = ‘ ‘

alpha = 1, ch = 7

alpha = 17, ch = ‘A’

alpha = 17, ch = ‘a’

3 points
Question 38
1. Suppose that x is an int variable, y is a double variable, z is an int variable, and the input is:

15 76.3 14

Choose the values after the following statement executes:

cin >> x >> y >> z;

x = 15, y = 76, z = 14

x = 15, y = 76, z = 0

x = 15, y = 76.3, z = 14

x = 15.0, y = 76.3, z = 14.0

3 points
Question 39
1. Suppose that x and y are int variables, ch is a char variable, and the input is:

4 2 A 12

Choose the values of x, y, and ch after the following statement executes:

cin >> x >> ch >> y;

x = 4, ch = 2, y = 12

x = 4, ch = A, y = 12

x = 4, ch = ‘ ‘, y = 2

This statement results in input failure

3 points
Question 40
1. Suppose that ch1, ch2, and ch3 are variables of the type char and the input is:

A B
C

Choose the value of ch3 after the following statement executes:

cin >> ch1 >> ch2 >> ch3;

‘A’

‘B’

‘C’

‘n’

3 points
Question 41
1. Suppose that ch1 and ch2 are char variables, alpha is an int variable, and the input is:

A 18

What are the values after the following statement executes?

cin.get(ch1);
cin.get(ch2);
cin >> alpha;

ch1 = ‘A’, ch2 = ‘ ‘, alpha = 18

ch1 = ‘A’, ch2 = ‘1’, alpha = 8

ch1 = ‘A’, ch2 = ‘ ‘, alpha = 1

ch1 = ‘A’, ch2 = ‘n’, alpha = 1

3 points
Question 42
1. Suppose that ch1, ch2, and ch3 are variables of the type char and the input is:

A B
C

What is the value of ch3 after the following statements execute?

cin.get(ch1);
cin.get(ch2);
cin.get(ch3);

‘A’

‘B’

‘C’

‘n’

3 points
Question 43
1. When you want to process only partial data, you can use the stream function ____ to discard a portion of the input.

clear

skip

delete

ignore

3 points
Question 44
1. Suppose that alpha, beta, and gamma are int variables and the input is:

100 110 120
200 210 220
300 310 320

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

cin >> alpha;
cin.ignore(100, ‘n’);
cin >> beta;
cin.ignore(100,’n’);
cin >> gamma;

100

200

300

320

3 points
Question 45
1. Suppose that ch1 and ch2 are char variables and the input is:

WXYZ

What is the value of ch2 after the following statements execute?

cin.get(ch1);
cin.putback(ch1);
cin >> ch2;

W

X

Y

Z

3 points
Question 46
1. Suppose that ch1 and ch2 are char variables and the input is:

WXYZ

What is the value of ch2 after the following statements execute?

cin >> ch1;
ch2 = cin.peek();
cin >> ch2;

W

X

Y

Z

3 points
Question 47
1. In C++, the dot is an operator called the ____ operator.

dot access

member access

data access

member

3 points
Question 48
1. Suppose that x = 25.67, y = 356.876, and z = 7623.9674. What is the output of the following statements?

cout << fixed << showpoint;
cout << setprecision(2);
cout << x << ‘ ‘ << y << ‘ ‘ << z << endl;

25.67 356.87 7623.96

25.67 356.87 7623.97

25.67 356.88 7623.97

25.67 356.876 7623.967

3 points
Question 49
1. 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

3 points
Question 50
1. What is the output of the following statements?
cout << setfill(‘*’);
cout << “12345678901234567890” << endl
cout << setw(5) << “18” << setw(7) << “Happy”
<< setw(8) << “Sleepy” << endl;

12345678901234567890
***18 Happy Sleepy

12345678901234567890
***18**Happy**Sleepy

12345678901234567890
***18**Happy Sleepy

12345678901234567890
***18**Happy Sleepy**

3 points
Question 51
1. What is the output of the above statements?
cout << “123456789012345678901234567890” << endl
cout << setfill(‘#’) << setw(10) << “Mickey”
<< setfill(‘ ‘) << setw(10) << “Donald”
<< setfill(‘*’) << setw(10) << “Goofy” << endl;

123456789012345678901234567890
####Mickey Donald*****Goofy

123456789012345678901234567890
####Mickey####Donald*****Goofy

123456789012345678901234567890
####Mickey####Donald#####Goofy

23456789012345678901234567890
****Mickey####Donald#####Goofy

3 points
Question 52
1. Consider the following program segment.
ifstream inFile; //Line 1
int x, y; //Line 2

… //Line 3
inFile >> x >> y; //Line 4

Which of the following statements at Line 3 can be used to open the file progdata.dat and input data from this file into x and y at Line 4?

inFile.open(“progdata.dat”);

inFile(open,”progdata.dat”);

open.inFile(“progdata.dat”);

open(inFile,”progdata.dat”);

3 points
Question 53
1. In a ____ control structure, the computer executes particular statements depending on some condition(s).

looping

repetition

selection

sequence

3 points
Question 54
1. What does <= mean?

less than

greater than

less than or equal to

greater than or equal to

3 points
Question 55
1. Which of the following is a relational operator?

=

==

!

&&

3 points
Question 56
1. Which of the following is the “not equal to” relational operator?

!

|

!=

&

3 points
Question 57
1. Suppose x is 5 and y is 7. Choose the value of the following expression:

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

false

true

0

null

3 points
Question 58
1. The expression in an if statement is sometimes called a(n) ____.

selection statement

action statement

decision maker

action maker

3 points
Question 59
1. What is the output of the following C++ code?
int x = 35;
int y = 45;
int z;

if (x > y)
z = x + y;
else
z = y – x;

cout << x << ” ” << y << ” ” << z << endl;

35 45 80

35 45 10

35 45 –10

35 45 0

3 points
Question 60
1. When one control statement is located within another, it is said to be ____.

blocked

compound

nested

closed

3 points
Question 61
1. What is the output of the following code?

if (6 > 8)
{
cout << ” ** ” << endl ;
cout << “****” << endl;
}
else if (9 == 4)
cout << “***” << endl;
else
cout << “*” << endl;

*

**

***

****

3 points
Question 62
1. The conditional operator ?: takes ____ arguments.

two

three

four

five

3 points
Question 63
1. What is the value of x after the following statements execute?

int x;
x = (5 <= 3 && ‘A’ < ‘F’) ? 3 : 4

2

3

4

5

3 points
Question 64
1. 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

3 points
Question 65
1. What is the output of the following code?

char lastInitial = ‘S’;

switch (lastInitial)
{
case ‘A’:
cout << “section 1” <<endl;
break;
case ‘B’:
cout << “section 2” <<endl;
break;
case ‘C’:
cout << “section 3” <<endl;
break;
case ‘D’:
cout << “section 4” <<endl;
break;
default:
cout << “section 5” <<endl;
}

section 2

section 3

section 4

section 5

3 points
Question 66
1. What is the output of the following code?

char lastInitial = ‘A’;

switch (lastInitial)
{
case ‘A’:
cout << “section 1” <<endl;
break;
case ‘B’:
cout << “section 2” <<endl;
break;
case ‘C’:
cout << “section 3” <<endl;
break;
case ‘D’:
cout << “section 4” <<endl;
break;
default:
cout << “section 5” <<endl;
}

section 1

section 2

section 3

section 5

3 points
Question 67
1. What is the output of the following code fragment if the input value is 4?
int num;
int alpha = 10;
cin >> num;
switch (num)
{
case 3:
alpha++;
break;
case 4:
case 6:
alpha = alpha + 3;
case 8:
alpha = alpha + 4;
break;
default:
alpha = alpha + 5;
}
cout << alpha << endl;

13

14

17

22

3 points
Question 68
1. What is the output of the following C++ code?
int x = 55;
int y = 5;

switch (x % 7)
{
case 0:
case 1:
y++;
case 2:
case 3:
y = y + 2;
case 4:
break;
case 5:
case 6:
y = y – 3;
}
cout << y << endl;

2

5

8

10

3 points
Question 69
1. A(n) ____-controlled while loop uses a bool variable to control the loop.

counter

sentinel

flag

EOF

3 points
Question 70
1. Consider the following code. (Assume that all variables are properly declared.)

cin >> ch;

while (cin)
{
cout << ch;
cin >> ch;
}

This code is an example of a(n) ____ loop.

sentinel-controlled

flag-controlled

EOF-controlled

counter-controlled

3 points
Question 71
1. What is the next Fibonacci number in the following sequence?

1, 1, 2, 3, 5, 8, 13, 21, …

34

43

56

273

3 points
Question 72
1. Which of the following is the initial statement in the following for loop? (Assume that all variables are properly declared.)

int i;
for (i = 1; i < 20; i++)
cout << “Hello World”;
cout << “!” << endl;

i = 1;

i < 20;

i++;

cout << “Hello World”;

3 points
Question 73
1. What is the output of the following C++ code?
int j;
for (j = 10; j <= 10; j++)
cout << j << ” “;
cout << j << endl;

10

10 10

10 11

11 11

3 points
Question 74
1. Suppose sum, num, and j are int variables, and the input is 4 7 12 9 -1. What is the output of the following code?

cin >> sum;
cin >> num;
for (j = 1; j <= 3; j++)
{
cin >> num;
sum = sum + num;
}
cout << sum << endl;

24

25

41

42