Java - SET -1

Which of the following is correct about an array in Java?

• Its size can be changed dynamically

• It starts with index 1

• All elements have the same data type

• Array elements can have mixed data types

Tags

java

array

How does the indexing of an array start and end if there are 'n' elements?

• Starts at 0, ends at n

• Starts at 1, ends at n-1

• Starts at 0, ends at n-1

• Starts at 1, ends at n

Tags

java

array

In which of the following declarations, both arr1 and arr2 are arrays?

• int[] arr1, arr2;

• int arr1[], arr2;

• Int []arr1, arr2;

• None of the above

Tags

java

array

What will be the default values of elements in an integer array in Java?

• 0

• null

• -1

• Undefined

Tags

java

For a boolean array in Java, which of the following will be the default value for its elements?

• 0

• null

• true

• false

Tags

java

Which of the following methods is used to create arrays dynamically at runtime in Java?

• using `malloc()`

• using `new` keyword

• using `define`

• using `sizeof()`

Tags

java

Which of the following is correct about initializing an array in Java?

• Elements can only be initialized during array declaration

• All elements are automatically initialized to their default values when using the `new` keyword

• Array initialization can only be done using the initialization block

• None of the above

Tags

java

Which array declaration method is used for Anonymous arrays in Java?

• `<array type>[] <array name> = new <array type>[<array-size>];`

• `<array type>[] <array name> = {<array initialization block>};`

• `new <array type>[] {<array initialization block>};`

• None of the above

Tags

java

If a `String` array is declared and constructed but not initialized, what will be the default value of its elements?

• 0

• ""

• null

• "String"

Tags

java

Which of the following is a correct way to declare, construct, and initialize an array in a single step?

• `<array type>[] <array name> = new <array type>[<array-size>] {<array initialization block>};`

• `<array type>[] <array name> = {<array initialization block>};`

• `<array type>[] <array name> = new <array type>[] {<array initialization block>};`

• None of the above

Tags

java