C and Java Programming Quiz

What is the output of the following program?

• 30 10

• 30 20

• 20 10

• 40 20

What is wrong with the following stack implementation?

• Incorrect condition for stack overflow

• Incorrect indexing for the stack

• No error, the code works correctly

• Stack is initialized incorrectly

Which of the following data structures is best suited for finding the median in a stream of numbers?

• Array

• Doubly Linked List

• Heap

• Binary Search Tree

Find the error in the following circular queue implementation:

• Incorrect modulo operation

• Overwriting of the first element during enqueue

• Incorrect check for queue full

• Logic for incrementing rear is incorrect

The time complexity of deleting a node in a doubly linked list with n nodes, given a pointer to the node, is:

• O(1)

• O(n)

• O(log n)

• O(n log n)

What will the following code output?

• 10

• 20

• Compile-time error

• Runtime error

What is the issue with the following Java snippet?

• Misuse of this keyword

• Incorrect variable declaration

• No error

• Incorrect access modifier for x

What will the following program output?

• 5

• 4

• 0

• Compiler error

Which of the following statements about polymorphism is incorrect?

• Polymorphism allows the same function name to be used for different purposes.

• Overloading and overriding are types of polymorphism.

• Runtime polymorphism is achieved using method overloading.

• Polymorphism is a core concept of OOP.

What happens if a private method in the superclass is overridden in the subclass?

• The subclass method is completely independent of the superclass method.

• The subclass method cannot be compiled.

• The subclass method overrides the superclass method.

• A runtime error occurs.