Unit 2 C Programming

Question 1

What are the three main concepts of C

Answer 1

How to use POINTERS
Importance of MEMORY ALLOCATION
The use of STRUCTS

Question 2

To which language do these concepts transfer to?

Answer 2

C++

Question 3

What is C++ made up of

Answer 3

1. The low level language of C
2. The standard library and the Standard Template Library
3. The ability to define your own types and user object-oriented software development

Question 4

When did C first appear

Answer 4

1972

Question 5

What is declared in the standard headers?

Answer 5

Functions, types and macros

Question 6

How do you access the standard header?

Answer 6

include <header.h> // this is deprecated</header.h>

#include <cheader> // this is the new valid import statement</cheader>

Question 7

What is the CRT?

Answer 7

C Run Time Library

Question 8

What is the point of including
#define CRT_SECURE_NO_WARNINGS

Answer 8

It tells the compiler that we do not want suggested secure warnings when using scanf();

Question 9

How do you declare the main scope in C

Answer 9

int main() {

}

Question 10

What do you return when the program exited with success

Answer 10

return 0;

Question 11

How do you import the C standard input/output library?

Answer 11

include <stdio.h></stdio.h>

Question 12

How many Primitive build-in types does C have?

Answer 12

13

Question 13

What are the different types of data and how many are there per category

Answer 13

Integer Types - 8
Char Types - 2
Floating Point Types - 3

Question 14

What are the integer types and their sizes

Answer 14

int 4 bytes
short int 2 Bytes
long int 4 Bytes
long long int 8 Bytes

All of these with the prefix unsigned

Question 15

What are the 2 char types and their sizes

Answer 15

char 1 Byte
unsigned char 1 Byte

Question 16

What are the 3 floating-point types

Answer 16

Float 4 Bytes
Double 8 Bytes
Long Double 16 Bytes

Question 17

What steps are required to turn source code into a functional program written in C

Answer 17

1. Write the source code in an IDE
2. The code goes through a preprocessor that re-writes the source code
3. Goes through a compiler which steps through the program generating assembly language for the specific processor
4. An assembler will convert the assemblyu code into pure binary or machine code. This is known as the object code
5. A linker merges all the object code from multiple modules int one. It creates the executable file