Java Basics Flashcard

Front

Which of the following is a valid declaration of a variable in Java? Options: `int 1x = 10;`, `int x = 10;`, `float y = 10.0;`, `boolean z = "true";`

Back

`int x = 10;`

Tags

DOK Level 1: Recall

Front

What is the result of the following expression in Java: `5 + 3 * 2`?

Back

11

Tags

DOK Level 1: Recall

Front

Which data type is used to create a variable that should store text? Options: `int`, `char`, `String`, `boolean`

Back

`String`

Tags

DOK Level 1: Recall

Front

Given the array `int[] numbers = {1, 2, 3, 4, 5};`, what is the value of `numbers[2]`?

Back

3

Tags

DOK Level 1: Recall

Front

Which of the following is the correct way to declare a method in Java? Options: `public void myMethod()`, `void myMethod() public`, `public myMethod() void`, `void public myMethod()`

Back

`public void myMethod()`

Tags

DOK Level 1: Recall

Front

What is the output of the following code snippet?
```java
String str = "Hello";
System.out.println(str.length());
```

Back

5

Tags

DOK Level 1: Recall

Front

Which operator is used to compare two values in Java? Options: `=`, `==`, `!=`, `<>`

Back

`==`

Tags

DOK Level 1: Recall

Front

What will be the output of the following code?
```java
int[] arr = {10, 20, 30, 40, 50};
System.out.println(arr[3]);
```

Back

40

Tags

DOK Level 1: Recall

Front

Which of the following statements is true about Java classes? A class can have multiple constructors. A class can only have one method. A class cannot have any fields. A class must be declared as `public`.

Back

A class can have multiple constructors.

Tags

DOK Level 2: Skill/Concept

Front

What will be the output of `add(5, 3)` in the following method:
```java
public int add(int a, int b) {
return a + b;
}
```

Back

8

Tags

DOK Level 2: Skill/Concept