Intro to programming UNIT 3

Question 1

What is a ternary operator

Answer 1

The ternary operator is a short if else statement in one line. It takes three operands

Question 2

What operands does a ternary operator take. In what order

Answer 2

1. The condition being tested
2. Value if true
3. Value if false

ex:
condition ? value if true : value if false

Question 3

What does the && operator do and what is it’s logical table?

Answer 3

The && Operator is for logical AND. Both operands need to be true for it to return as TRUE

side 1 side 2 result
false false false
true false false
false true false
true true true

Question 4

What does the || operator do and what’s it logic table

Answer 4

The || Operator is for logical OR. Either or both operands need to be true for it to return as TRUE

side 1 side 2 result
false false false
true false true
false true true
true true true

Question 5

What is the logical not operator?

Answer 5

Using the (!) exlamation mark

Question 6

How do you invert the && or the || operator?

Answer 6

You add the exclamation mark before
ex:
!||
!&&

Question 7

What is called an inverse of an or?

Answer 7

NOR or NOT OR

Question 8

What is the inverse of an and

Answer 8

NAND

Question 9

What is the Logical XOR or Exclusive OR or Bitwise comparison operator?

Answer 9

Using the caret or ^ symbol

Question 10

What is the XOR operator truth table?

Answer 10

Both sides cannot be the same for the operator to return as true

false false false
true false true
false true true
true true false

Question 11

What is the XOR of

0001
0011

Answer 11

Result 0010

Question 12

What evaluations can you use in a SWITCH statement

Answer 12

You can only use equality operators in a switch evaluation. Therefore you cannot use > < operators only ==

Question 13

What’s the structure of a switch statement?

Answer 13

switch(toBeEvaluated) {
case 1:
break;

Question 14

What is default for a switch?

Answer 14

Default is the case that will be run if no matches are found. It needs to be placed at the bottom of the switch case

Question 15

What is a TRAILING ELSE BLOCK

Answer 15

It’s the default case that executes if none of the other cases evaluate to true

Question 16

What is range testing?

Answer 16

It’s the testing of a value to see if it fits between set constraints

Question 17

What operator does the inside the fence check use?

Answer 17

It uses the AND Operator

Question 18

What operator does the outside the fence check use?

Answer 18

It uses the OR Operator

Question 19

What datatypes can be evaluated in a switch statement

Answer 19

It can only be used with items that can be compared for equality. Therefore you cannot evaluate doubles, floats and items that are not whole.

Question 20

What datatypes can you use in a switch

Answer 20

Int
Char
Strings

Question 21

What isn’t required in a default switch case?

Answer 21

You do not need a break statement. Since it will already be the last case to be evaluated.

Question 22

What happens when you compare Object with the “==” equality operator

Answer 22

It checks to see if it’s the same object. It will not necessarily check the data in them. Ex: Comparing string objects

Question 23

How do you compare string objects?

Answer 23

stringOne.equals(stringTwo);

This will return a boolean value. If both char arrays match it will return true. False if not matching.