COSC 1436 Midterm Review

Of the following, which is a valid C++ identifier?

-June1997 -_employee_number -____department -myExtraLongVariableName

At the heart of a computer is its central processing unit. The CPUs jobs is:

-To fetch instructions -To carry out the operations commanded by the instructions -To produce some outcome or resultant information

In a C++ program, two slash marks (//) indicate:

The beginning of a comment

What is the value stored at x, given the statements: int x; x = 1 / static_cast<int>(4.5 + 6.4);

0

This manipulation is used to establish a field width for the value immediately following it

set w

the first step in testing the string class is to #include the _____ header file.

string

During which stage does the central processing unit retrieve from main memory the next instruction in the sequence of program instructions?

Fetch

What will the following code display? cout << "four\n" << "score\n"; cout << "and" << "\nseven"; cout << "\nyears" << " ago" << endl;

Four score and secen years ago

Besides decimal, two other number systems you might encounter in C++ programs are:

Hexadecimal and Octal

The computer's main memory is commonly known as:

RAM

A variable's ________ is the part of the program that has access to the variable

Scope

Even when there is no power to the computer, data can be held in:

Secondary storage

An example of a secondary storage is:

The disk drive

The purpose of a memory address is:

To identify the location of a byte in memory

Programmer defined names of memory locations that may hold data are:

Variables

________ represent storage locations in the computer's memory

Variables

Which character signifies the beginning of an escape sequence?

\

Which escape sequence causes the cursor to move to the beginning of the current line?

\r

The ___________ causes a program to wait until information is typed at the keyboard and the Enter key is pressed.

cin object

Which of the following defines a double-precision floating point variable named payCheck?

double payCheck;

To use the rand() function, you must #include this header file in your program

cstdlib

The total number of digits that appear before and after the decimal point is sometimes referred to as:

significant digits and precision

Which statement is equivalent to the following: x = x*2

x *= 2;

What statement best describes a variable and its primary purpose?

A variable is a named storage location in the computer's memory used for holding a piece of information.

You must have a ___________ for every variable you intend to use in a program.

Definition

In C++ 11, if you want an integer literal to be treated as a long int, you can append ______ at the end of the number

LL

These are date items whose values do not change while the program is running

Literals

Mistakes that cause a running program to produce incorrect results are called:

Logic errors

In a broad sense, the two primary categories of programming languages are:

Low-level and High-level

This is a set of rules that must be followed when constructing a program.

Syntax

The ______ decodes an instruction and generates electrical signals.

Control Unit

In programming terms, a group of characters inside a set of quotation marks is called a(n):

String literal

In any program that uses the cin object, you must included the ______

iostream header file

What is the modulus operator?

%

Which line in the following program will cause a compiler error? 1 #include <iostream> 2 using namespace std; 3 4 int main() 5 { 6 const int MY_VAL = 77; 7 MY_VAL = 99; 8 cout << MY_VAL << endl; 9 return 0; 10 }

7

Assuming you are using a system with 1-byte characters, how many bytes of memory will the following string literal occupy? "William"

8

The ______ operator always follows the cin object, and the _____ operator follows the cout object

>>,<<

The programmer usually enters source code into a computer using:

A text editor

Three primary activities of a program are:

Input, processing, output

Associativity is either right to left or:

Left to right

The ______ causes the content of another file to be inserted into a program

#include directive

Assume that x is an int variable. What value is assigned to x after the following assignment statement is executed? x = -3 + 4 % 6 / 5;

-3

an integrated Development Environment typically consists of:

-A text editor -A compiler -A debugger

When a variable is assigned a number that is too large for its data type, it:

Overflows

When converting some algebraic expressions to C++, you may need to insert ___________ that do not appear in the algebraic expression.

Parentheses

Which of the following is not one of the five major components of a computer system?

Preprocessor

You want the user to enter the length, width, and height from the keyboard. Which cin statement is correctly written?

cin >> length >> width >>height;

This statement will pause the screen, until the [Enter] key is pressed

cin.get();

What will the value of x be after the following statements execute? int x = 0; int y = 5; int z = 4; x = y + z * 2;

13

What is the value of cookies after the execution of the following statement? int number = 38, children = 4, cookies; cookies = number % children;

2

What will the value of result be after the following statement executes? result = 6 - 3 * 2 + 7 - 10 / 2 ;

2

What will the value of x be after the following statements execute? int x; x = 10 % 4;

2

What is the value of the number after the following statements execute? int number = 10; number += 5; number -= 2; number *= 3;

39

What will the value of x be after the following statements execute? int x; x = 10 / 4;

4

What is the value of average after the following code executes? double average; average = 1.0 + 2.0 + 3.0 / 3.0;

4.0

A set of well-defined steps for performing a task or solving a problem is know as a(n);

Algorithm

Which of the following best describes an operator?

An operator allows you to perform operations on one or more pieces of data.

_______ are used to translate each source code instruction into the appropriate machine language instructions

Compilers

Which is true about the following statement? cout << setw(4) << num4 << " ";

It allows four spaces for the value in the variable num4

What will the following code display? cout << "Monday"; cout << "Tuesday"; cout << "Wednesday";

MondayTuesdayWednesday

The statement: cin >> setw(10) >> str; will read up to this many characters into str.

Nine

in memory, C++ automatically places a ______ at the end of string literals

Null terminator

A(n) ____ is the most fundamental set of programs on a computer

Operating system

Characters of symbols that perform operations on one or more operands are:

Operators

This is used in a program to mark the beginning or ending of a statement, or separate items in a list.

Punctuation

This is used to mark the end of a complete C++ programming statement.

Semicolon

The statements written by the programmer are called:

Source code

This is a complete instruction that causes the computer to perform some action.

Statement

Internally, the CPU consists of two parts:

The control Unit and the Arithmetic and Logic Unit

When the final value of an expression is assigned to a variable, it will be converted to:

The data type of the variable

________ must be included in any program thatuses the cout object

The header file iostream

Which data type typically requires only one byte of storage?

char

This function tells the cin object to skip one or more characters in the keyboard buffer.

cin.ignore();

The function, pow(x, 5.0), requires this header file.

cmath

When using the sqrt function you must include this header file.

cmath