Coding

Question 1

How do you create a List in Java?

Answer 1

List<Datatype> listName = new ArrayList<DataType>();</DataType></Datatype>

Question 2

What method is used to add an elment to a list?

Answer 2

.add(element)

Question 3

What method is used to remove an elment from a list?

Answer 3

.remove(index)

Question 4

How do you create a set?

Answer 4

Set<Datatype> setName = new HashSet<>();</Datatype>

Question 5

How do you add an element to a set?

Answer 5

.add(element)

Question 6

How do you remove an elment from a set?

Answer 6

.remove(elment)

Question 7

loop throught a set?

Answer 7

The same like regular arrays.

Question 8

How do you create a map in java?

Answer 8

Map<KeyDataType, ValueDataType> = new HashMap<>();

Question 9

How do you loop throught a map in Java

Answer 9

for(Map.Entry<KeyDataType, ValueDataType> entry : mapName.entrySet()){
//code
}

Question 10

How do you add an elment into a map?

Answer 10

mapName.put(key, value)

Question 11

How do your remove an elment from a map?

Answer 11

mapName.remove(key)

Question 12

How do you get the key or value of a map entry?

Answer 12

entry.getKey();
entry.getValue();