Skip to content

Commit

Permalink
Update java-quiz.md (#3047)
Browse files Browse the repository at this point in the history 
Add ####Q121

Co-authored-by: Zhenja <evg.bazhanov@yahoo.com>
  • Loading branch information
@PabloCuestaMorer @Ebazhanov
PabloCuestaMorer and Ebazhanov committed Feb 2, 2022
1 parent 684dd0c commit a3e4714
Showing 1 changed file with 28 additions and 15 deletions.
43 changes: 28 additions & 15 deletions java/java-quiz.md
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1444,28 +1444,28 @@ class Lambo extends Car {
- [ ] overloading
- [ ] overriding

####Q107. Which choice is the best data type for working with money in Java?
#### Q107. Which choice is the best data type for working with money in Java?

- [ ] float
- [ ] String
- [ ] double
- [x] BigDecimal

####Q108. Which statement about constructors is not ture?
#### Q108. Which statement about constructors is not ture?

- [ ] A class can have multiple constructors with a different parameter list.
- [ ] You can call another constructor with `this` or `super`.
- [ ] A constructor does not define a return value.
- [x] Every class must explicitly define a constructor without parameters.

####Q109. What language feature allows types to be parameters on classes, interfaces, and methods in order to reuse the same code for different data types?
#### Q109. What language feature allows types to be parameters on classes, interfaces, and methods in order to reuse the same code for different data types?

- [ ] Regular Expressions
- [ ] Reflection
- [x] Generics
- [ ] Concurrency

####Q110. What will be printed?
#### Q110. What will be printed?
```java
public class Berries{

Expand All @@ -1485,7 +1485,7 @@ public class Berries{
- [ ] blueberry
- [ ] rasp

####Q111. What is the value of `forestCount` after this code executes?
#### Q111. What is the value of `forestCount` after this code executes?

```java
Map<String, Integer> forestSpecies = new HashMap<>();
Expand All @@ -1503,7 +1503,7 @@ int forestCount = forestSpecies.size();
- [ ] 2
- [ ] When calling the put method, Java will throw an exception

####Q112. What is a problem with this code?
#### Q112. What is a problem with this code?

```java
import java.util.ArrayList;
Expand All @@ -1530,7 +1530,7 @@ class Main {
- [ ] The List interface does not allow an argument of type String to be passed to the remove method.
- [ ] ArrayList does not implement the List interface.

####Q113. How do you convert this method into a lambda expression?
#### Q113. How do you convert this method into a lambda expression?

```java
public int square(int x){
Expand All @@ -1543,7 +1543,7 @@ public int square(int x){
- [x] `Function<Integer, Integer> squareLambda = x -> x * x;`
- [ ] `Function<Integer, Integer> squareLambda = x -> return x * x;`

####Q114. Which choice is a valid implementation of this interface?
#### Q114. Which choice is a valid implementation of this interface?

```java
interface MyInterface {
Expand Down Expand Up @@ -1588,7 +1588,7 @@ public class MyClass implements MyInterface {
}
```

####Q115. What is the result of this program?
#### Q115. What is the result of this program?

```java
interface Foo{
Expand All @@ -1609,7 +1609,7 @@ public class Main{
- [ ] null
- [x] An error will occur when compiling.

####Q116. Which statement must be inserted on line 1 to print the value true?
#### Q116. Which statement must be inserted on line 1 to print the value true?

```
1:
Expand All @@ -1622,7 +1622,7 @@ public class Main{
- [ ] `String val = null;`
- [ ] `Optional<String> val = Optional.empty();`

####Q117. What will this code print, assuming it is inside the main method of a class?
#### Q117. What will this code print, assuming it is inside the main method of a class?

```java
System.out.println(true && false || true);
Expand All @@ -1634,7 +1634,7 @@ System.out.println(false || false && true);
- [x] true </br> false
- [ ] false </br> false

####Q118. What will this code print?
#### Q118. What will this code print?

```java
List<String> list1 = new ArrayList<>();
Expand All @@ -1654,21 +1654,34 @@ System.out.println(list1);
- [x] `[One, Three]`
- [ ] `Two`

####Q119. Which code checks whether the characters in two Strings,named `time` and `money`, are the same?
#### Q119. Which code checks whether the characters in two Strings,named `time` and `money`, are the same?

- [ ] `if(time <> money){}`
- [x] `if(time.equals(money)){}`
- [ ] `if(time == money){}`
- [ ] `if(time = money){}`

####Q120. An ______ is a serious issue thrown by the JVM that the JVM is unlikely to recover from. An ______ is an unexpected event that an application may be able to deal with in order to continue execution.
#### Q120. An ______ is a serious issue thrown by the JVM that the JVM is unlikely to recover from. An ______ is an unexpected event that an application may be able to deal with in order to continue execution.

- [ ] exception,assertion
- [ ] AbnormalException, AccidentalException
- [x] error, exception
- [ ] exception, error

####Q121. Which OOP concept is this code an example of?
#### Q121. Which keyword would not be allowed here?

```java
class Unicorn {
_____ Unicorn(){}
}
```

- [x] static
- [ ] protected
- [ ] public
- [ ] void

#### Q122. Which OOP concept is this code an example of?

```java
List[] myLists = {
Expand Down

0 comments on commit a3e4714

Please sign in to comment.