CSCI 1470: Study Guide 1 Questions

"{" and "}" are called **braces** and they delimit a list or block of statements.

True

False

True

When the CPU is executing an instruction that needs some data, it gets the data from main memory in order to process it.

True

The devices that feed data and programs into computers are called output devices.

False

Information stored in main memory must be transferred to a nonvolatile device for permanent storage.

True

GIGA is a unit prefix in the metric system denoting a factor of one million (1,000,000).

False

Instructions represented as a sequence of 0s and 1s are known as machine instructions.

True

Compilers are programs that automatically translate high-level language programs into executable programs.

True

Assembly language, ALGOL, FORTRAN, C, C++, and Java are all high-level languages.

False

Every C++ program must have a function called main.

True

A reserved word can be used as a variable name.

False

The following is a legal C++ identifier: Hello!

False

The maximum number of significant digits in float values is up to 6 or 7.

True

If a C++ arithmetic expression has no parentheses, operators are evaluated from left to right.

True

The explicit conversion of a value from one data type to another is called type casting.

True

The value of a variable cannot change during program execution.

False

Suppose x = 8. After the execution of the statement y = x+1; y is 9 and x is 9.

False

The escape sequence \\t moves the cursor to the beginning of the next line.

False

In the statement cin >> x;, x can be a variable or an expression.

False

The extraction operator >> skips only leading blank spaces when searching for the next data in the input stream.

False

When reading data into a char variable, after skipping any leading whitespace characters, the extraction operator >> finds and stores only the next character; reading stops after a single character.

True

Entering a char value into an int variable causes serious errors, called input failure.

True

In the C++ statement, \n   \n cin.get(u); \n   \n u must be a variable of type char.

True

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

False

Manipulators without parameters are part of the header file iomanip.

False

For interactive input/output in a program, the program must include the header file iostream.

True

Main memory is called ____.

RAM (Random Access Memory)

Main memory is an ordered sequence of items, referred to as ____.

Memory Locations

When the power is switched off, everything in ____ is lost.

main memory

secondary storage

hard disks

floppy disks

main memory

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

Analog signals

Application programs

Digital signals

System programs

Digital Signals

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

bit

bytecode

Unicode

hexcode

bit

ASCII is a standard that defines the numeric codes for ____ characters.

254

128

65536

32768

128

A program called a(n) ____ links together the object files and libraries.

assembler

decoder

linker

compiler

linker

An ____ is a sequence of steps for solving a problem.

algorithm

linker

analysis

design

algorithm

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

analyzing the problem

Which of the following is a reserved word in C++?

char

Char

CHAR

character

char

An example of a floating point data type is ____.

int

char

double

short

double

____ is a valid int value.

46,259

46259

462\.59

\-32.00

46259

The memory allocated for a float value is ____ bytes.

two

four

eight

sixteen

four

The value of the expression 17 % 7 is ____.

1

2

3

4

3

Choose the output of the following C++ statement: \n cout << "Sunny " << '\\n' << "Day " << endl;

Sunny \\nDay

Sunny \\nDay endl

Sunny \n Day

Sunny \\n \n Day

Sunny

Day

____ are output statements that inform the user what to do.

Variables

Prompt lines

Named constants

Expressions

prompt lines

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;

int a,b,c;

Suppose that x is an int variable and y is a double variable and the input is: \n   \n 10 20.7 \n   \n Choose the values after the following statement executes: cin >> x >> y;.

x = 10, y = 20

x = 10, y = 20.0

x = 10, y = 20.7

x = 10, y = 21.0

x = 10, y = 20.7

Suppose that x is an int variable, y is a double variable and ch is a char variable and the input is: \n   \n 15A 73.2 \n   \n Choose the values after the following statement executes: \n   \n 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.

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

Suppose that x is an int variable, ch is a char variable, and the input is: \n   \n 276. \n   \n Choose the values after the following statement executes: \n   \n cin >> ch >> x;

ch = '2', x = 276

ch = '2', x = 76

ch = ' ', x = 276

ch = 'b', x = 76

ch = ‘2’, x = 76

Suppose that alpha is an int variable and ch is a char variable and the input is: \n   \n 17 A \n   \n What are the values after the following statements execute? \n   \n cin >> alpha; \n cin >> ch;

alpha = 17, ch = ' '

alpha = 1, ch = 7

alpha = 17, ch = 'A'

alpha = 17, ch = 'a'

alpha = 17, ch = ‘A’

Suppose that ch1, ch2, and ch3 are variables of the type char and the input is: \n   \n A B \n C \n   \n Choose the value of ch3 after the following statement executes: \n   \n cin >> ch1 >> ch2 >> ch3;

'A'

'B'

'C'

'\\n'

‘C’

Manipulators without parameters are part of the ____ header file.

iostream

iomanip

ifstream

pmanip

iostream

Suppose that alpha, beta, and gamma are int variables and the input is: \n   \n 100 110 120 \n 200 210 220 \n 300 310 320 \n   \n What is the value of gamma after the following statements execute? \n   \n cin >> alpha; \n cin.ignore(100, '\\n'); \n cin >> beta; \n cin.ignore(100,'\\n'); \n cin >> gamma;

100

200

300

320

300

Using functions greatly enhances the program’s readability because it reduces the complexity of the function main. \n       

True

False

True

A function can have zero to many parameters, and it can have ________ return value(s). \n  

zero to many

no

zero or one

a maximum of ten

zero or one

When a function is called, flow of control moves to the function's prototype. \n       

True

False

False

In a value-returning function header line, you are required to furnish \n  

the name of the function

the data type(s) and name(s) of any parameters

the data type of the return value

All of these \n  

All of these

A function's return type must be the same as the function's parameters. \n       

True

False

False

A void function is one that \n  

does nothing useful

has an empty function body

has no parameters

returns no value \n  

returns no value

A  ________ variable is defined inside the body of a function and is not accessible outside that function. \n  

global

reference

local

counter

local

A variable that can be accessed anywhere in the program is said to have  ________ scope. \n  

global

external

local

dynamic

global

Value-returning functions cannot be called in expressions. \n       

True

False

False

When a function just needs to use a copy of an argument passed to it, the argument should normally be passed by \n  

variable

value

reference

design

value

________ parameters allow a function to access and modify the parameter's corresponding argument. \n  

reference

floating-point

integer

undeclared

reference

Values passed to a function are called ________. \n  

parameter

argument

function's value

All of these

argument

A value-returning function should have reference parameters only. \n       

True

False

False

The ________ statement causes a function to end and the flow of control to move back to the point where the function call was made. \n  

end

break

continue

return

return

Files (i.e., file stream objects) should be passed by reference. \n       

True

False

True

A void function is one that \n  

has an empty function body

is never called

returns no value

has no parameters

returns no value

A(n) ________ is information that is passed to a function, and a(n) ________ is a special variable that receives and holds that information. \n  

function call, function header

function prototype, function header

parameter, argument

argument, parameter

argument, parameter

When only a copy of an argument is passed to a function, it is passed ______ \n     

by copy

by reference   

informally

by value

by value

When a function needs to modify the original argument passed to it, for example in order to change its value, the argument needs to be __________ \n  

passed by value

passed into a reference parameter

a static variable

an integer

passed into a reference parameter

Files (i.e., file stream objects) should be passed by value. \n       

True

False

False

A ________ variable is declared outside all functions. \n     

local

global

floating-point

counter

global

A  ________ variable is defined inside the body of a function and is not accessible outside that function. \n  

global

reference

counter

local

local

Given the function prototype:      float cube(float x); \n which of the following statements is a legal function call? \n     

cout << cube;

cout << cube(10.5);

cube();

cout << cube();

cout << cube(10.5);

Given the function prototype:    void print_val(); \n which of the following statements is legal? \n  

cout << print_val;

cout << print_val();

print_val();

cout << print_val(10.5);

print_val();

Given the function definition:

void increment_val(int& val1, float& val2 )
{
val1 = val1 + 1;
val2 = val2 + 1.0;
}

what are the values printed on the screen after the statements below are executed?

int myval = 1;
float yourval = 2.5;
increment_val(myval, yourval);
cout << myval << ' ' << yourval;

1 2.5

2 2.5

2 3.5

1 3.5

2 3.5

A function ________ eliminates the need to place a function definition before all calls to the function. \n  

header

prototype

argument

parameter

prototype

Given the function definition:

void increment_val(int val1, float val2 )
{
val1 = val1 + 1;
val2 = val2 + 1.0;
}

what are the values printed on the screen after the statements below are executed?

int myval = 1;
float yourval = 2.5;
increment_val(myval, yourval);
cout << myval << ' ' << yourval;

1 2.5

2 2.5

2 3.5

1 3.5

1 2.5

A function is executed when it is ________ \n  

defined

prototyped

called

declared

called

A function’s parameter list cannot be empty. \n  

True

False

False

If the parameter list of a function is empty, the parentheses after the function name are not needed. \n  

True

False

False

The execution of a return statement in a user-defined function terminates the function. \n  

True

False

True

It is not necessary to specify the names of parameters in a function prototype. \n  

True

False

True

When writing a function prototype, you do not have to specify the data type of each parameter. \n  

True

False

False

A value-returning function can return two values via the return statement. \n  

True

False

False

The execution of a C++ program always begins with the function main. \n  

True

False

True

It is legal to use a return statement without any value in a user-defined void function. \n  

True

False

True

If a void function has three value parameters, it must have at least two reference parameters. \n  

True

False

False

Any parameter that receives a value and also sends a value outside the function must be declared as a reference parameter. \n  

True

False

True

Whenever the value of a reference parameter changes, the value of the argument changes. \n  

True

False

True

The corresponding argument for a reference parameter can be any expression. \n  

True

False

False

The content of a parameter that is a reference parameter is an address. \n  

True

False

True

A global identifier is an identifier declared outside of every function definition. \n  

True

False

True

Using global variables in a program is a better style than using local variables because extra variables can be avoided. \n  

True

False

False

Functions that do not have a return type are called ____ functions. \n  

zero

null

void

empty

Void

Given the following function prototype: int test(float, char);

which of the following statements is valid? \n  

cout << test(12, &);

cout << test("12.0", '&');

int u = test(5.0, '\*');

cout << test(5.0, "\*");

int u = test (5.0, ‘\*’);

A function prototype is ____. \n  

a definition, but not a declaration

a declaration and a definition

a declaration, but not a definition

a comment line

a declaration, but not a definition

Given the following function prototype: double tryMe(double, double);

which of the following statements is valid? Assume that all variables are properly declared. \n  

cin >> tryMe(x);

cout << tryMe(2.0, 3.0);

cout << tryMe(tryMe(double, double), double);

cout << tryMe(tryMe(float, float), float);

cout << tryMe(2.0, 3.0);

Given the function prototype: double testAlpha(int u, char v, double t);

which of the following statements is legal? \n  

cout << testAlpha(5, 'A', 2.);

cout << testAlpha( int 5, char 'A', double 2);

cout << testAlpha('5.0', 'A', "2.0");

cout << testAlpha(5.0, "65", 2.0);

cout << testAlpha(5, ‘A’, 2.);

Given the function prototype: float test(int, int, int); \n   \n which of the following statements is legal? \n  

cout << test(7, test(14, 23));

cout << test(test(7, 14), 23);

cout << test(14, 23);

cout << test(7, 14, 23);

cout << test(7. 14, 23);

Which of the following function prototypes is valid? \n  

int funcTest( x, y, z);

funcTest(int x, int y, float z);

int funcTest(int x, int y, float z)

int funcTest(int, int, float);

int funcTest(int, int, float);

Given the following function prototype: int myFunc(int, int);

which of the following statements is valid? Assume that all variables are properly declared. \n  

cin >> myFunc(y);

cout << myFunc(myFunc(7, 8), 15);

cin >> myFunc('2', '3');

cout << myFunc(myFunc(7), 15);

cout << myFunc(myFunc(7, 8), 15);