02 - Data Types

Question 1

What value will sizeof(char) always return?

Answer 1

1

Question 2

What type is missing in this hierarchy?

char <= ??? <= int <= long <= long long

Answer 2

short

Question 3

How many bytes does the C standard require for the short data type?

Answer 3

> = 2

Question 4

How many bytes does the C standard require for the intndata type?

Answer 4

> = 2

Question 5

How many bytes does the C standard require for the long data type?

Answer 5

> = 4

Question 6

How many bytes does the C standard require for a pointer?

Answer 6

Nothing

The standard does not define the length of a pointer

Question 7

What is the data type of this constant?

7

Answer 7

Integer (int by default)

Question 8

What is the data type of this constant?

3.141

Answer 8

Floating point (double by default)

Question 9

What is the data type of this constant?

-12.4e-24

Answer 9

Floating point (double by default)

Question 10

What is the data type of this constant?

1000000000ll

Answer 10

long long

Question 11

What is the data type of this constant?

902ul

Answer 11

unsigned long

Question 12

What is the data type of this constant?

7.45f

Answer 12

float

Question 13

What is the data type of this constant?

‘\n’

Answer 13

char

Question 14

What is the data type of this constant?

“\n”

Answer 14

string (array of char)

Question 15

What is the data type of this constant?

“Hello, World!\n”

Answer 15

string (array of char)

Question 16

What is the data type of this constant?

0x10

Answer 16

hexadecimal

Question 17

What is the data type of this constant?

-0100

Answer 17

octal

Question 18

What is the data type of this constant?

0xdull

Answer 18

unsigned long long hex

Question 19

What is the symbol to denote a new line?

Answer 19

\n

Question 20

What is the symbol to denote a tab?

Answer 20

\t

Question 21

What does the special character ‘\n’ denote?

Answer 21

A newline

Question 22

What does the special character ‘"’ denote?

Answer 22

A double quote

Question 23

What characters can a C variable name start with?

Answer 23

A letter of an underscore

Question 24

Which C variables are automatically initialised?

Answer 24

Global variables are initialised to 0. All other variables must be manually initialised

Question 25

In the printf() function, what does the %i symbol denote?

Answer 25

An int value

Question 26

In the printf() function, what does the %c symbol denote?

Answer 26

A char

Question 27

In the printf() function, what does the %s symbol denote?

Answer 27

A String

Question 28

In the printf() function, what does the %d symbol denote?

Answer 28

An int

Question 29

In the printf() function, what does the %f symbol denote?

Answer 29

A float

Question 30

In the printf() function, what does the %e symbol denote?

Answer 30

A float in scientific notation

Question 31

In the printf() function, what does the %li symbol denote?

Answer 31

A long int

Question 32

In the printf() function, what does the %lf symbol denote?

Answer 32

A double

Question 33

What will the following program print?

int i = 2;
int j = 3;
char c = ‘\n’;
printf(“%d < %d%c”,i,j,x);

Answer 33

The program will output:

“2 < 3” and end with a new line

Question 34

What are the five categories of operators in C?

Answer 34

Arithmetic
Relational
Boolean
Incremental
Bitwise