coding relay MCQ

Front

What is the output of the following C++ code?
#include <iostream>
using namespace std;
int main() {
int x = 5;
cout << x++ * ++x;
return 0;
}

Back

Undefined behaviour

Front

What is the size of int in C++ (typically on a 64-bit system)?

Back

4 bytes

Front

What will happen if return 0; is missing in main() function in C++?

Back

Program runs successfully

Front

What is the default value of a boolean variable in Java?

Back

False

Front

Which data structure is most efficient for implementing a priority queue? Options: a) Array, b) Linked List, c) Heap, d) Stack

Back

Heap

Front

What does the following Python code print?
def func(a, b=2):
return a * b
print(func(3))

Back

6

Front

In the following Java code, what will be the output of the statement System.out.println(s1 == s2);?
class Test {
public static void main(String[] args) {
String s1 = "Java";
String s2 = new String("Java");
System.out.println(s1 == s2);
}
}

Back

False

Front

Which scheduling algorithm can lead to starvation in a heavily loaded system? Options: a) Round Robin, b) Shortest Job First (SJF), c) First-Come, First-Served (FCFS), d) Multilevel Queue

Back

Shortest Job First (SJF)

Front

What will be the output of the following Java code?
class Test {
public static void main(String[] args) {
System.out.println(10 + 20 + "Hello" + 10 + 20);
}
}

Back

30Hello1020

Front

What will be the output of the following Python code?
x = [1, 2, 3]
y = x
y.append(4)
print(x)

Back

[1, 2, 3, 4]