Year-3

What will be the output of the following code?

int arr[] = {1, 2, 3, 4, 5};

int *ptr = arr;

printf("%d", *(ptr + 3));

• 1

• 3

• 4

• Compilation Error

What does the following code snippet do?

int x = 5;

int *ptr = &x;

(*ptr)++;

printf("%d", x);

• Increments the value of x by 1

• Decrements the value of x by 1

• Gives an error

• Does nothing

Which sorting algorithm has the worst-case time complexity of ?

• Merge Sort

• Quick Sort

• Bubble Sort

• Heap Sort

What is the output of the following code?

void function(int arr[], int n) {

for (int i = 0; i < n; i++) {

arr[i] += 5;

}

}

int main() {

int arr[] = {1, 2, 3};

function(arr, 3);

printf("%d", arr[1]);

return 0;

}

• 2

• 7

• 3

• Compilation Error

Which of the following is true about a struct in C?

• Members of a struct are allocated contiguous memory by default.

• Struct can contain only primitive types.

• Struct members can be accessed using dot (.) and arrow (->) operators.

• Struct can be used to implement inheritance.

What is the correct syntax for defining a template class in C++?

• template<class T>

• class template<T>

• template<class>

• template(T)

Which of the following is not a valid feature in C++?

• Friend Function

• Operator Overloading

• Multiple Inheritance

• Garbage Collection

What is the time complexity of searching in a balanced binary search tree (e.g., AVL Tree)?

• O(n)

• O(logn)

• O(nlog⁡n)

• O(1)

What will the following Java program output?

class Test {

public static void main(String[] args) {

String str = "Hello";

str.concat(" World");

System.out.println(str);

}

}

• Hello

• Hello World

• Compilation Error

• Runtime Error

Which of the following is the correct implementation of a thread in Java?

• class MyThread implements Runnable

• class MyThread extends Runnable

• class MyThread implements Thread

• class MyThread implements Callable