Lecture 2

Question 1

What are the 6 elements of writing a readable program?

Answer 1

1. Structure
2. Cohesion (put parts that belong together, together)
3. Seperation ( whitespace)
4. Indentation (tabs)
5. Comments (javadoc)
6. Logical Variable names (clearly expressing their role)

Question 2

What is the difference between & and && or | and ||

Answer 2

& and | check both sides and decide whether the logical operation is true, && and || don’t check the right-hand side if the left-hand side alone is enough to know the result of the operation

Question 3

What is “^” in java?

Answer 3

logical XOR

Question 4

What is “~” in java?

Answer 4

bitwise complement (not …)

Question 5

Give an example of a switch-statement

Answer 5

switch (grade)  {
case 10:
result = "perfect";
break;
case 9:
case 8:
case 7:
case 6:
result = "Pass";
break;
default:
result = "Fail";
}