110 - Software Development

Question 1

What is the print function in C?

Answer 1

Printf()

Question 2

How to start a program?

Answer 2

1. Decompose the problem into a small number of steps

2. Then again into subsets until you can start to program

Question 3

What does this do?

for (i=0; i<10; i++)
{
print(“Hi!\n”);
}

Answer 3

It is a for loop that allocated the value of “0” to the variable called “i”. Then for states “for as long as i is less than 10, print “Hi” then add 1 each time

Question 4

What does “%d” mean?

Answer 4

Print an integer

Question 5

What does “scanf()” do?

Answer 5

It gets the user input

Question 6

Always remember to do what?

Answer 6

Add meaningful comments to clarify what your code is trying to achieve

Question 7

What does Camelcase look like?

Answer 7

camelCase

Question 8

What is an Array?

Answer 8

Arrays provide a way for storing multiple instances of the same data type

Question 9

What index is the 2nd place in the array and why?

Answer 9

Index 1 because the indexes start at index 0

Question 10

What do functions do?

Answer 10

Create reusable units of code to help avoid repetition by factoring our common elements

Question 11

What does “rand()” do?

Answer 11

It generates a random number.

Question 12

Function definitions have what form?

Answer 12

Direct-declarator (parameter-type-list)

Question 13

Functions DO NOT return what?

1. A union
2. An arithmetic type
3. A function
4. A structure
5. An array
6. A pointer
7. A void

(Pick two)

Answer 13

A function and an array

Question 14

In C, functions may have side effects (e.g. printing) what is not always needed to prevent this?

Answer 14

The return value

Question 15

What does “void” mean?

Answer 15

It means that nothing is returned

Question 16

What do you need at the beginning of every C program?

Answer 16

Int main()

Question 17

What does it mean when you say x = y?

Answer 17

You’re copying the contents of “y” into “x”

Question 18

What is a pointer?

Answer 18

A pointer is a variable that contains the address of a variable

Question 19

What does “int *p = &x; mean if:

int x = 65; (index 3)
int y = 32; (index 1)

Answer 19

It is pointing to the place in member where int x is. In this case , the answer is index 3

Question 20

What does p = &x; do?

Answer 20

It puts the address of box x into p

Question 21

What does *p = 8; do?

Answer 21

Puts the value 8 into the box pointed to by p

Question 22

What does “printf(“%d\n”, marks[0] if

7 | marks[0] = 55;
8 | marks[1] = 65;
9 | marks[2] = 70;

Answer 22

Print the integer that in is “marks[0]”

Question 23

What’s the difference between;

printf(“%d\n”, marks);

and

printf(“%d\n”, *marks);

Answer 23

The first statement prints out the integer that is located in “marks” and the second statement prints out the integer that “marks” is pointing to

Question 24

Why is a “&” needed before the variables when using “scanf”?

Answer 24

It needs to modify the variable

Question 25

What is a string?

Answer 25

It is text or a sequence of characters

Question 26

How many spaces in memeber does char s[] = “hello”; and why?

Answer 26

It’s 6 elements long because it also null byte “\0”. This tells the computer when to stop

Question 27

How do you calculate the length of a string?

Answer 27

Using the “strlen()” function. Start at the beginning and check to see if you’ve reached the null byte