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C Programming - Expressions

Exercise : Expressions - Yes / No Questions
1.
Are the following two statement same?
1. a <= 20 ? (b = 30): (c = 30);
2. (a <=20) ? b : (c = 30);
Yes
No
Answer: Option
Explanation:

No, the expressions 1 and 2 are not same.

1. a <= 20 ? (b = 30) : (c = 30); This statement can be rewritten as, 


if(a <= 20)
{
    b = 30;
}
else
{
    c = 30;
}

2. (a <=20) ? b : (c = 30); This statement can be rewritten as, 


if(a <= 20)
{
    //Nothing here
}
else
{
    c = 30;
}

2.
Two different operators would always have different Associativity.
Yes
No
Answer: Option
Explanation:

No, Two different operators may have same associativity.

Example:
Arithmetic operators like ++, -- having Right-to-Left associativity.
Relational operators like >, >= also have Left-to-Right associativity.

3.
Will the expression *p = p be disallowed by the compiler?
Yes
No
Answer: Option
Explanation:
Because, here even though the value of p is accessed twice it is used to modify two different objects p and *p
4.
Every operator has an Associativity
Yes
No
Answer: Option
Explanation:

Yes, Each and every operator has an associativity.

The associativity (or fixity) of an operator is a property that determines how operators of the same precedence are grouped in the absence of parentheses. Operators may be left-associative, right-associative or non-associative.

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