Name: You have questions on both Sides. ENGR203 Quiz 3 1. Suppose that x, the fo

Question

Name: You have questions on both Sides. ENGR203 Quiz 3 1. Suppose that x, the following statements (15') y, z and w are int variables, and x-9, y-8, z 1 and w#7, what is the output of 2. Which of the following are logical (Boolean) operators? (5') 3. Which of the following are relational operators? (5') d. =! True or False (15') a. The result of a logical expression cannot be assigned to an int variable b. In C++, both ! and != are logical operators. c. Every if statement must have a corresponding else. d. The expression ! (x>0) is true if x is a negative number. e. In a one-way selection, if a semicolon is placed after the expression in an if statement, the 4. expression in the if statement is always true. Evaluate the following expressions true or false a. 5+6-3+7 b. 2*6-4>-9-1 5. (20') e. 6.28/310) 6. (20") 11 (z-2 != 28) 7. Suppose that str1, str2, and str3 are string variables, and str1-"English", str2-"Computer Science", and str3-"Programming". Evaluate the following expressions true or false. (10') b. stri >-str2 c. str3 str2 8. Write the meaning of the following operators (10') b. 88-

Explanation / Answer

Following is the answers:

1)

a) False

b) True

c) True

2)

a,d,e

Logical OR = e = ||

Logical AND = d = &&

Logical NOT = a = !

3)

a,b

Relational lessthen = a = <

Relational lessthen or equal to = b = <=

4)

a.False(you can assign a logical expression to int.)

b.False (Only != is Logical Operator.)

c.False (You can only assign if statement.)

d.True (because First x>0 is false but ! is opposite the output so it's true.)

e.False

5)

a.False

b.True

c.False

d.False

e.False

6)

b.True

c.False

d.True

e.True

f.True

7)

b.False(According to string size)

c.True(According to string size)

8)

a.!= -> Not Equal

b.&& -> Logical AND

c.|| -> Logical OR

d.== -> Equals To

e.! -> Logical NOT

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