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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...
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...
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
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.
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...
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.
I appeared for an interview in Feb 2025.
0/1 Knapsack Problem
Count islands in a 2D grid of 0s and 1s, where 1s represent land and 0s represent water.
An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically.
Use Depth-First Search (DFS) or Breadth-First Search (BFS) to explore and mark visited land.
Example grid: [[1,1,0,0],[0,1,0,0],[0,0,1,1],[0,0,0,0]] has 2 islands.
Iterate through each cell; if a '1' is found, increment the island co
I applied via Naukri.com and was interviewed in Oct 2024. There was 1 interview round.
NetApp interview questions for popular designations
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I applied via Job Fair and was interviewed in Oct 2024. There was 1 interview round.
I applied via Campus Placement and was interviewed in Jun 2024. There were 3 interview rounds.
I appeared for an interview in Jul 2024.
I appeared for an interview in Jan 2025.
I applied via Naukri.com and was interviewed in Oct 2024. There was 1 interview round.
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