Interview experience: Druva

Round 1 :

Coding Aptitude: 2 parts

• 1. CNS, OS, Linux command, DSA-based basic MCQ questions
• 2. Three coding problems:

• Find the number of vowels present in the string
• Check whether the given number lies in the Fibonacci series or not

(fib seq: 0,1,1,2,3,5,8,13,21….)

• Find the maximum two-digit number present in the given big integer

Ex. I/p: 7649833

Ans. 98

Round 2: Technical interview (40 min.)

CNS QUESTIONS:

• What is 1. subnet mask
• IP address
• Mac address
• ipconfig
• ifconfig
• TCP
• Difference between TCP and UDP
• What happens when you type google.com in the browser
• Protocol stake layer in OS model
• DNS server
• DHCP

OS QUESTIONS:

• What is multi-threading
• What is thread and process
• What is multi-processing

Linux questions:

• Which one is used in Linux: ifconfig or ipconfig and what do they display after executing
• What is the command used to find the specific string present in the file or not
• What is the command used for finding file is present or not in the directory
• How to search for a specific file like xyz.txt from the computer there are many

directories and files present in Linux on the terminal

Coding problems given in the technical round to write on paper:

1. Write a program in any language the find a particular string present in the file or not.

(I solved this using the file handling concept in Java)

2. Write a program in any language to remove the duplicate lines from the given log file.

(I solved this in Java using HashSet and file handling)

3. Given a list of single-digit integers we have to find the occurrences of 0,0,7 in sequence

There may other integers present between 0 and 0,7
Example:
Input list : [2,0,5,0,7,3]
Output: 1 occurrence of 0,0,7

Coding problem asked to others:

• write merge sort
• Find the third/second largest and third/second smallest integer in the list
• Two sum and three sum problems from leetcode
• Basic string manipulation

Round 2: Technical + HR interview :

I was not selected after technical, this was my first interview.