8. Separate methods and logical operators

Question 1

What are the values of the following expressions?

1) 3 < 4 && ( 7 > 10 || 19 == 20)
2) 3 < 4 && ( 7 > 10 || 19 != 20)
3) 3 < 4 || ( 7 > 10 && 19 == 20)
4) 3 < 4 || ( 7 > 10 && 19 != 20)
5) 3 < 4 && 7 > 10 || 19 == 20
6) 3 < 4 && 7 > 10 || 19 != 20
7) 3 < 4 || 7 > 10 && 19 == 20
8) 3 < 4 || 7 > 10 && 19 != 20

Answer 1

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Question 2

Why are methods called methods?

Answer 2

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Question 3

When should methods have private visibility?

Answer 3

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Question 4

What two attributes does a method parameter have at compile time? How many parameters can a method have?

Answer 4

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Question 5

What is the difference between method arguments and method parameters?

Answer 5

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Question 6

Can a void method have parameters? What (else) can it not have?

Answer 6

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Question 7

What statement is used to produce the result from a method? How do we know what kind of result can be produced?

Answer 7

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Question 8

What is the name for the mechanism for passing arguments to methods in Java? What is the significance of the approach?

Answer 8

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Question 9

How do we print an int value with space padding up to twelve characters?

Answer 9

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Question 10

How do we get an int value printed with zero padding up to twelve characters?

Answer 10

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Question 11

What does the following code do?

int y = 100;
for (int x = 0; x < y; x++, y–)
System.out.println(x + y);

Answer 11

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Question 12

Why is boolean type called boolean?

Answer 12

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Question 13

Why do text data strings need to be members of a type?

Answer 13

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Question 14

How do we stop two methods having variables of the same name?

Answer 14

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Question 15

What other term is used for local variables?

Answer 15

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Question 16

What are the differences between class variables and local variables?

Answer 16

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Question 17

What is wrong with the following?

int count = 10, isRaining = false, retirementAge = 65;

Answer 17

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Question 18

What is wrong with the code like following?

if (be == true)
bv = true;
else
bv = false;

Answer 18

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