BCA/IT-lll (2023-26) QuizoBite Round 1

Which of the following statements about inheritance in Java is correct?

• Java supports multiple inheritance through classes

• A class can extend more than one class

• Java does not support inheritance

• Java supports multiple inheritance through interfaces

What will be the output of the following code? int x = 5; System.out.println(x++ + ++x);

• 11

• 12

• 10

• 13

Which of the following is true about the final keyword in Java?

• A final class can be inherited

• A final method can be overridden

• A final variable can be reassigned

• A final class cannot be extended

What is the purpose of the transient keyword in Java?

• It defines a variable that cannot be serialized

• It marks a variable as static

• It defines a variable that is constant

• It allows a method to run in the background

Which of the following exceptions is unchecked in Java?

• IOException

• SQLException

• NullPointerException

• FileNotFoundException

What is the time complexity of searching an element in a linked list?

• O(1)

• O(log n)

• O(n)

• O(n log n)

Which data structure is used for implementing recursion?

• Queue

• Stack

• Linked list

• Array

In which case is the worst-case complexity of Quick Sort O(n^2)?

• When pivot is the middle element

• When all elements are equal

• When array is already sorted

• When array has distinct elements

What is the maximum number of nodes in a binary tree of height h?

• 2^h - 1

• 2h - 1

• h^2 - 1

• h - 1

Which traversal method uses queue data structure?

• Inorder

• Preorder

• Postorder

• Level order