Reve Systems Interview Questions (May 2026)

Round 1:Written Test - 90 min It comprises of 15 questions mainly from the topic OOPs concept , Coding Question(Linked List, Binary tree , Array Manipulation) and Pointer. Q.1)Given a binary search tree and a given key node. Print all the node from root to the nearest leaf node containing the key node. 4 / \ 2 6 \ / \ 3 5 7 \ 8 key node = 6 Output = 4 6 5 Q.2) Write a program to reverse the Singly Linked list Example: Initially - 1->2->3->4->5 Finally - 5->4->3->2->1 Q.3) Find the output of following code: int main() { int i=(4==4,5,6); int j= 8>>3&9; int d=i+j++*2; cout<<d<<endl;

return 0; } Q.4)Find the output of following code: int fib(int n) { if (n<=1)

return 1;

return 3fib(n-1)+2fib(n-2)+1*fib(n-3); } int main() { cout<<fib(5);

return 0; } Q.5) Write a program to find the trailing zeros of factorial of a given number.

Example: n = 12 Output = 2 Q.6) Find the output of following: class Base { Public: Base(){cout<<"Base Constructor"<<endl;} ~Base(){cout<<"Base Destructor"<<endl;} } class Derived: Public Base { Public: Derived(){cout<<"Derived Constructor"<<endl;} ~Derived(){cout<<"Derived Destructor"<<endl;} } int main() { Base *b; b = new Derived(); delete b; Derived d ;

return 0; } Q.7)Find the output of following: struct struct { double a; int b; int c; }; union union { double a; int b; int c; } int main { struct s; union u; cout<<sizeof(s)<<endl; cout<<sizeof(u)<<endl;

return 0; } Assume size of member variable a,b,c be 6,4,4 respectively. Q.8) Find the output of following: int main() { char ptr[] = {"india", "is", "a", "good", "country"}; char ptr1[] = {s+3, s+4, s+1}; char ptr2; ptr2 = ptr; cout << (*ptr1)<<" " <<ptr2;

return 0; } Q.9) Write a program to find maxm sum of continuous subarray of a array.

Example: 7 3 4 -5 9 4 -12 2 Output - 15 Q.10) Find the output of following code: class Animal() { public: virtual void eat()=0; virtual void sleep()=0; } class Cat : Public Animal { public: void eat() { cout<<"cat eat food"<<endl; } void sleep() { cout<<"cat sleep"<<endl; } } class Dog: Public Animal { public: void sleep() { cout<<" Dog sleep"<<endl; } } int main() { Animal *a; Cat c ; c.eat(); a=new Dog(); a.sleep();

return 0; }

Output - Compile time error Q.11)Write a program to find the first non-repeating character from the stream of characters. Q.12)Write a program to put all zero elements before non-zero elements from a given array Example: 2 0 3 4 0 0 1 0 output - 0 0 0 0 2 3 4 1 1 question from Multi-threading and other 2 are code-snippet , which I forgotten.

Note - Try to solve all Coding questions with minimum time and space complexity. On the same day evening, the results were out and total 6 students out of 54 got selected for further rounds. Fortunately, I was one of them Round 2:Technical + HR Interview(Around 45 min) Tell me about yourself. Find the frequency of all the element of array in space complexity-O(1) and time complexity - O(n). He asked me to explain Q.6 and Q.8 of written round. What is template and how to create template. Difference b/w template and method overloading. What is pointer and what are const pointer and it's types. how can you change the value of the const variable Asked me about Project(Academic + Summer). Then they asked some Hr Question- 1) Tell me your family background. 2) why should we hire you. The final result came after 5 days and out of 6, only 2 students got selected, I was one of them.