Arrays, Structs, Union

Question 1

For an array initialised as int val[5]
What is the type and value of the reference:
val

Answer 1

Type: int *
Value: x

Question 2

For an array initialised as int val[5]
What is the type and value of the reference:
val +1

Answer 2

Type: int *
Value: x + 4

Question 3

For an array initialised as int val[5]
What is the type and value of the reference:
&val[2]

Answer 3

Type: int *
Value: x + 8

Question 4

For an array initialised as int val[5]
What is the type and value of the reference:
*(val+1)

Answer 4

Type: int
Value: value of element in val[1]

Question 5

For an array initialised as int val[5]
What is the type and value of the reference:
val + i

Answer 5

Type: int *
Value: x + 4*i

Question 6

Array size of multidimensional arrays

Answer 6

R * C * k bytes
(where R is rows and C is columns)

Question 7

What is the starting address of of A[i]

Answer 7

A + i * (C * K)

Question 8

Difference between struct and Unions

Answer 8

In struct, each member is given a separate memory. While all members of union use the same memory location and so it can handle only one number at a time

Question 9

Solving alignments problems

Answer 9

Remember what the lowest address must be divisible by what

Question 10

How to reduce memory space of structs

Answer 10

Rearrange the elements by putting large data types first

Question 11

How is the memory allocated for union

Answer 11

According to the largest element