# Ciena Interview experience | Set 1

Round 1:Â It was telephonic interview for 1 hr. Following questions they asked..
2-> How ping command works.
3-> How DNS works. They gave one URL and again asked how DNS works.
4-> How trace route works.
5-> What is binary search tree and time complexity.

Round 2:Â They took this round overÂ collabedit for 1 hr.
1-> They gave one digram 6 connected routers and assigned IP address on each routers . Then asked , create ip static table, about ping command and trace route command.
2-> Implement your own memset or memcpy function.
3-> Program toÂ check If bit is set or not at particular position.

Round 3:Â This round was face to face around 1 hr 30 mnts.
1->Â Asked Â about BGP and routing table. Afterwards draw a diagram with 6 connected routers and autonomous numbers. They Â asked about EBGP and IBGP . Difference between EBGP and IBGP. Difference between OSPF and BGP. Best path selection in BGP and OSPF. BGP attributes.
2-> Reverse a string in place.

Round 4:Â This round Â was face to face for 1 hr around.
1-> How command line arguments works in C language. Write a program to take input from user and validate string with some given validation.
2-> Implement queue using two stacks.
3-> Binary search tree. Write program to search an element in BST.
4-> Count set bits in given number.
5-> Given integer number , write a program to return value of 1st block of memory value considering machine is little endian.
6->Write a program to check If machine is little endian or big endian.

Round 5:Â This round was also face to face for 1 hr around.
1->Â find maximum number among four numbers without using conditional or bitwise operator.
2-> Write a program to find loop in linked list.
3-> Write a program toÂ find intersection point of two linked list.
4-> Write a function to delete a node when passing only a node pointer to function.
5-> Write a program toÂ toggle bit at given position.

Round 6:Â This was HR round for 30 minutes only.
They asked me about why do you want to leave previous company and why you interested in ciena.
After couple of weeks I got confirmation mail.

Thanks geeksforgeeks for preparing question. You can easily find all coding question in geeksforgeeks. For protocol you can google it.

Whether you're preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, GeeksforGeeks Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we've already empowered, and we're here to do the same for you. Don't miss out - check it out now!

Previous
Next