Static variable

Question 1

On infinite function calls , what happens?

Answer 1

Stack size is over / Stack overflow error(runtime error mostly due to logical mistakes)

Question 2

if(10.5)

Answer 2

True

Question 3

if(-11)

Answer 3

true

Question 4

if(‘A’)

Answer 4

true

Question 5

if(0.0)

Answer 5

False

Question 6

if(null)

Answer 6

False

Question 7

if(0)

Answer 7

False

Question 8

if(‘\o’)

Answer 8

False

Question 9

a=5
POSTFIX: x=a–
OR
PREFIX: x=–a

Answer 9

POSTFIX: x=5
PREFIX: x=4

Question 10

What happens if we use static keyword for a local variable for instance,
static int a=5;

Answer 10

It is local but will be stored in static area and compiler will assign it memory during compile time. No matter how many times the function is called static memory is only allocated once.

Question 11

Even in multiple calls of the same function in which a static variable is declared, how many times is that variable allocated memory?

Answer 11

Only once in static area, all function calls share the same value of the variable as stored in static area.

Question 12

If a same fn. is called again and again and it includes declaration of a variable which is not static, what happens?

Answer 12

Memory is allocated to that variable again and again and it is initialized again & again

Question 13

Stack overflow occurs when functions are called infinitely but not for an infinite loop, WHY?

Answer 13

Because when function is called , activation records are pushed into stack but infinite loop doesn’t affect stack.

Question 14

Default value of static variable?

Answer 14

0

Question 15

Global variable are stored in?

Answer 15

Static area

Question 16

Local static variable can be accessed only in?

Answer 16

That particular function

Question 17

When is static variable deallocated?

Answer 17

When main over

Question 18

a*=b+c

Answer 18

a=a*(b + c ) , First b + c is evaluated then it is multiplied by a

Question 19

r*f(n)
r+f(n)
r-f(n)
r/f(n)

Answer 19

We will not place value of r until f(n) is calculated

Question 20

r*7+f(n)

Answer 20

We can put r before calculating f(n) as r adjacent operand decided

Question 21

r+3*f(n)

Answer 21

You have to wait before putting value of r because r’s adjacent operator is not decided

Question 22

a+b*c()

Answer 22

High priority of b*c hence both a, b will wait

Question 23

a=b=c

Answer 23

R to L associative , value of c required for b which is required for a