first

Question 1

How does the c++ program run?

Answer 1

The operating system runs c++ program by calling main ()

Question 2

What is the four elements of function definition?

Answer 2

Name, return type, formal parameter, and the body

Question 3

What does it mean when we say built in types?

Answer 3

Defined by the language

Question 4

Can you explain how return works?

Answer 4

it returns value to the function caller but you can also provide a value, but it must be the same as the return type, example if the return type is int the value returned must be int too.

Question 5

What is a type?

Answer 5

defines the contents of a data element and the possible operations possible on those data.

Question 6

Source file

Answer 6

file that contains source code

Question 7

Explain why we need to provide suffix for the file? Give some examples of a C++ suffix

Answer 7

The suffix tells the system that the file is a C++ program. .cp .cpp

Question 8

What is a library and why do we need it.

Answer 8

Collection of classes and functions

Question 9

What is a stream?

Answer 9

Sequence of characters read from or written to an IO device

Question 10

What does the term stream suggest?

Answer 10

It is intended to suggest that characters are generated and consumed sequentially overtime

Question 11

What is iostream?

Answer 11

Header that provides the library types for stream-oriented

input and output.

Question 12

Define iostream

Answer 12

iostream defines cin, cout, cerr, clog, which corresponds to standard input stream, standard output stream, unbuffered standard error stream, and buffered standard error stream.

Question 13

Standard input and output

Answer 13

Input and output associated with the window in which the program executes

Question 14

Standard error

Answer 14

Output stream used for error reporting

Question 15

cin (see-in)
cout (see-out)
cerr
clog

Answer 15

istream object used to read from the standard input
ostream object used to write to standard output
ostream object used for error messages
ostream object used to report information about program execution to a log file

Question 16

include pre-processor directive

Answer 16

tells the compiler to include a library or header

Question 17

What is expression?

Answer 17

composed of one or more operands and an operator

Question 18

Explain the output operator

Answer 18

Takes two operands, left-hand operand must be an ostream object and right-hand operand which is the actual value to be printed, output operator writes the value be printed to the left-hand operand. which will be the result of output operator.

Question 19

Why is it possible to chain output request?

Answer 19

Result of first operator becomes the left-hand operand for the next operator.

Question 20

String literal

Answer 20

Sequence of characters enclosed with a double quotation.

Question 21

Manipulator

Answer 21

Manipulates the stream itself.

Question 22

endl()

Answer 22

Ends the line and flushes the buffer.

Question 23

Buffer

Answer 23

Region of storage used to hold data

Question 24

Why do we flush the buffer?

Answer 24

To ensure that output generated by our program is actually written in output stream, rather that sitting in memory waiting to be written.

Question 25

What this namespace statement mean ? std::cout

Answer 25

means that the name cout is defined inside the namespace called std

Question 26

Why use namespace?

Answer 26

to avoid using the same names we define and names inside the library.

Question 27

scope resolution::

Answer 27

used to access namespace

Question 28

comments and it’s uses

Answer 28

Program text that is ignored by the compiler. summarize an algo, identify the purpose of variable and expalain a segment of code.

Question 29

Condition

Answer 29

expression that yields a result that is either true or false

Question 30

Assignment

Answer 30

Replaces object’s current value by a new one.

Question 31

< less than operator
<= less than or equal to operator
>  greater than operator
>= greater than or equal to operator
== equality operator
!=  inequality operator

Answer 31

tests whether the left-hand operand is less than the right-hand operand.

tests whether the left-hand operand is less than or equal to the right-hand operand.

tests whether the left-hand operand is greater than the right-hand operand.

tests whether the left-hand operand is greater than or equal to the right-hand operand.

tests whether the left-hand operand is equal to the right-hand operand.

tests whether the left-hand operand is not equal to the right-hand operand.

Question 32

+= compound assignment operator

Answer 32

Adds right-hand operand to the left and stores the result in left-hand operand.

Question 33

++ increment operator

Answer 33

add 1 to it’s operand.

Question 34

– decrement operator

Answer 34

subtracts 1 to it’s operand

Question 35

While loop

Answer 35

loop that executes statements as long as the condition is true.

Question 36

For loop

Answer 36

loop that executes a specific number of times

Question 37

What happens when we use istream as a condition?

Answer 37

test the state of the stream. if input is valid it is true but if the input is ivalid then we will have eof.

Question 38

Explain Syntax error, Type errors, Declaration errors

Question 39

Why is it a good idea to correct erros?

Answer 39

because it can have cascading effect causing compiler to report more errors than what is actually present.

Question 40

Edit-compile-debug

Answer 40

process of getting the program to execute properly.

Question 41

if statement

Answer 41

consist of condition and statement to be executed if the condition is true.

Question 42

How Indentation and Formatting helps our program?

Answer 42

readability and understandability

Question 43

data structure

Answer 43

logical grouping of data and operation on that data.

Question 44

Class

Answer 44

Facility for defining our own data structures together with

associated operations.

Question 45

Class type

Answer 45

type defined by a class, the name of the type is the class name.

Question 46

purpose of header?

Answer 46

to access the classes defined for our own application

Question 47

include <> and #include “”

Answer 47

part of standard library and user defined

Question 48

member function

Answer 48

operation defined by a class

Question 49

. operator

Answer 49

left-hand operand is an object of a class and righthand operand is a class member.

Question 50

() call operator.

Answer 50

causes the function to be invoked.

Question 51

arguments

Answer 51

Value passed to a function.