Question

Please Help with the following questions (just true or false, except last one is choose 1)

QUESTION 1

Given:

int myvar=99;

Is this expression true or false?

myvar

(That is, is the value of myvar, 99, true or false)

True

False

QUESTION 2

Given:

int myvar=3;

int yourvar=0;

Is the following expression true or false?

myvar == 3 && yourvar == 0

True

False

QUESTION 3

Given:

int myvar=3;

int yourvar=0;

Is the following expression true or false?

myvar == 2 || yourvar == 0

True

False

QUESTION 4

Given:

int myvar=3;

int yourvar=0;

Is the following expression true or false?

myvar == 3 || yourvar != 0

True

10 points   

QUESTION 5

Given:

int myvar=3;

int yourvar=0;

Is the following expression true or false?

myvar || yourvar != 0

True

False

QUESTION 6

Given:

int myvar=3;

int yourvar=0;

Is the following expression true or false?

!myvar || yourvar != 0

True

False

QUESTION 7

Given:

int myvar=3;

I want the expression to be true if myvar is equal to 2 or myvar is equal to 3. What is wrong with the following expression?

myvar == 2 || == 3

-		The expression is fine, there is nothing wrong.
-		The expression is asking if myvar is 2 and myvar is 3. But myvar can't be two numbers at once!
-		> and < should be used, not ==
-		The == is a binary operator (like the addition operator, +, is a binary operator). That means there has to be something on both sides of the operator.

Answer 1

Solution:

1)

True

Explanation:

In the expression myvar is assigned a value 99. The expression is correct because the value can be assigned to a variable.Any integer value can be assigned to the variable.

2)

True

Explanation:

The expression is checking the value of the variable myvar and yourvar that is if the value of the myvar is 3 and the value of the yourvar is 0 then the expression will return true. Here, the variabale myvar is assigned a value 3 and the variable yourvar is assigned a value 0 initially. Therefore, it satisfies the condition.

3)

True

Explanation:

The expression is checking the value of the variable myvar and yourvar that is if the value of the myvar is 3 or the value of the yourvar is equal to 0 then the expression will return true. Here, the variabale myvar is assigned a value 3 and the variable yourvar is assigned a value 0 initially. Therefore, it satisfies the condition.

4)

True

Explanation:

The expression is checking the value of the variable myvar and yourvar that is if the value of the myvar is 3 or the value of the yourvar is not equal to 0 then the expression will return true. Here, the variabale myvar is assigned a value 3 and the variable yourvar is assigned a value 0 initially. Therefore, it satisfies the condition.

5)

True

Explanation:

The expression is checking the value of the variable myvar and yourvar that is if the value of the myvar or the value of the yourvar is not equal to 0 then the expression will return true. Here, the variabale myvar is assigned a value 3 and the variable yourvar is assigned a value 0 initially. The value of myvar in the expression always return true because it is not comparing with any other value hence it will return true every time. Therefore, it satisfies the condition.

6)

False

Explanation:

The expression is checking the value of the variable myvar and yourvar that is if the value of the myvar or the value of the yourvar is not equal to 0 then the expression will return true. Here, the variabale myvar is assigned a value 3 and the variable yourvar is assigned a value 0 initially. The value of myvar in the expression always return false because it is not comparing with any other value and there is not operator infront of myvar. Hence it will return false every time. Therefore, it satisfies the condition.

7)

Explanation:

For the expression to be true the expression has to be syntactically correct. Here the expression is not syntactically correct. The correct syntactically expression is:

myvar == 2 || myvar == 3

Hence, the correct option is as follows:

The == is a binary operator (like the addition operator, +, is a binary operator). That means there has to be something on both sides of the operator.