NetApp Interview Questions and Answers

IP tables is a firewall configuration tool in Linux.

• IP tables is used to filter network traffic based on a set of rules.

• It can be used to block or allow traffic based on source/destination IP address, port number, protocol, etc.

• IP tables is configured using the command line interface.

• It is commonly used in Linux servers to secure the network.

• Example: iptables -A INPUT -s 192.168.1.0/24 -j DROP

Program to traverse a linked list

• Start from the head node

• Iterate through each node until the end is reached

• Perform necessary operations on each node

Program to reverse a linked list using extra space.

• Create a new empty linked list

• Traverse the original linked list and push each node to the new linked list

• Return the new linked list as the reversed linked list

Find the total number of matches to be played in a knockout football tournament with n teams.

• The number of matches played in a knockout tournament is always one less than the number of teams.

• Use the formula (n-1) to calculate the total number of matches.

• For example, in a tournament with 8 teams, the total number of matches played would be 7.

Find closest ancestor of two nodes in a tree

• Traverse the tree from root to both nodes and store the paths

• Compare the paths to find the closest common ancestor

• Use recursion to traverse the tree and find the ancestor

• If one node is an ancestor of the other, return the ancestor node

Segmentation fault is a type of error that occurs when a program tries to access a memory location that it is not allowed to access.

• Segmentation fault is also known as segfault.

• It is a common error in C and C++ programming languages.

• It occurs when a program tries to access a memory location that it is not allowed to access, such as an area of memory that has not been allocated to the program.

• This can happen due to a va...read more

To find the maximum number from a million numbers entered on the fly or 1000 at a time.

• Create a variable to store the maximum number and initialize it to the first number entered

• Compare each subsequent number entered with the current maximum and update the variable if necessary

• If numbers are given 1000 at a time, store the maximum of each batch and compare them at the end to find the overall maximum

Variables for kernel level process should be stored in stack.

• Stack is faster than heap for accessing variables.

• Stack is limited in size, so use it for small variables.

• Heap is used for larger variables that need to persist beyond the function call.

• Kernel level processes should avoid dynamic memory allocation.

Internal fragmentation is the unused memory space within a partition or block.

• Occurs when allocated memory is larger than required

• Leads to inefficient use of memory

• Can be reduced by using memory allocation techniques like paging or segmentation

In C, structure variables cannot be directly compared using the comparison operators. Cell padding is used to align data in memory for efficiency.

• Structure variables in C cannot be compared directly using comparison operators like == or !=. Instead, you need to compare each member of the structure individually.

• Cell padding refers to the practice of adding empty bytes between structure members to align them in memory. T...read more

Global variables are stored in data segment while local variables are stored in stack memory.

• Global variables are accessible throughout the program while local variables are only accessible within their scope.

• Global variables are initialized to default values while local variables are not.

• Global variables can be modified by any function while local variables can only be modified within their scope.

Control is passed through function calls. Return address of main is stored in the stack.

• Control is passed to a function when it is called from main()

• The function executes and returns control to main() using the return statement

• The return address of main() is stored in the stack

• When the function returns, the return address is used to resume execution in main()

To calculate square root without math.h, use Newton's method.

• Choose a number to find the square root of

• Make an initial guess for the square root

• Use Newton's method to refine the guess

• Repeat until desired accuracy is achieved

• Newton's method: new_guess = (guess + (number/guess))/2

Find the lowest floor from which an egg breaks when dropped from a 30 floor building with 4 eggs.

• Use binary search approach to minimize the number of drops

• Start dropping the egg from the middle floor and check if it breaks

• If it breaks, start dropping from the middle of the lower half, else start from the middle of the upper half

• Repeat the process until the lowest floor is found

Use a max-heap to efficiently manage and delete the largest file in a nearly full file system.

• A max-heap allows for efficient retrieval and deletion of the largest element.

• Inserting a new file into the heap takes O(log n) time.

• Deleting the largest file (root of the heap) also takes O(log n) time.

• Example: If files have sizes [10MB, 20MB, 30MB], the max-heap will keep 30MB at the root.

• This structure ensures that the larg...read more

Using a heap in Q6 can have certain disadvantages.

• Heap operations are slower than array operations.

• Heap requires extra memory allocation.

• Heap may not be suitable for small datasets.

• Heap may not be efficient for certain types of data structures.

• Heap may lead to fragmentation of memory.

The OS resolves file paths by traversing the directory structure to locate the file's inode and data blocks.

• The file path is a hierarchical structure starting from the root directory (/).

• Each directory in the path is checked sequentially to find the next level.

• The OS uses the inode associated with the file to access its metadata and data blocks.

• For example, to find /root/home/mnit/abc.txt, the OS checks /root, then /ho...read more

I interned at XYZ company and developed a software using Agile methodology. Faced challenges in meeting deadlines.

• Interned at XYZ company and developed a software

• Used Agile methodology for software development

• Faced challenges in meeting deadlines

• Collaborated with team members to overcome challenges

Engineering solution to reduce plastic waste

• Develop biodegradable plastics

• Create recycling machines for households

• Implement a deposit system for plastic bottles

• Encourage the use of reusable bags and containers

• Design products with minimal packaging

• Develop a system to convert plastic waste into fuel

I really enjoyed the section on your development process.

• The detailed explanation of your agile methodology was impressive.

• The emphasis on collaboration and communication stood out to me.

• The use of real-life examples to illustrate your process was helpful.

• I appreciated the focus on continuous improvement and learning.

• Overall, it gave me a good understanding of how your team works and what to expect if I were to join.

Yes, my role as a software developer at NetApp is clear.

• My role is to develop and maintain software applications for NetApp.

• I work closely with other developers, project managers, and stakeholders to ensure that the software meets the needs of the business.

• I am responsible for writing clean, efficient, and well-documented code.

• I also participate in code reviews and contribute to the overall development process.

• For exam...read more

I enjoyed computer science and mathematics the most in college.

• Computer Science - I loved learning about algorithms, data structures, and programming languages.

• Mathematics - I enjoyed solving complex problems and understanding mathematical concepts.

Participated in various technical and cultural events, volunteered for social causes.

• Participated in coding competitions like CodeChef, HackerRank, etc.

• Organized technical events like hackathons, coding workshops, etc.

• Volunteered for social causes like blood donation camps, cleanliness drives, etc.

• Participated in cultural events like dance competitions, music concerts, etc.