Cisco Data Center Engineer Interview Questions and Answers for Freshers

Program to reverse an integer

• Convert the integer to a string

• Reverse the string

• Convert the reversed string back to an integer

I have worked on various projects including a web application for inventory management and a mobile app for task tracking.

• Developed a web application using React for inventory management, allowing users to track stock levels and generate reports.

• Created a mobile app using Flutter for task tracking, enabling users to create, assign, and track tasks in real-time.

• Collaborated with a team of developers to integrate APIs an...read more

Yes, I am interested in studying further to enhance my skills and knowledge in software engineering.

• Interested in pursuing a Master's degree in Computer Science

• Enrolling in online courses to learn new technologies and programming languages

• Attending workshops and conferences to stay updated with industry trends

Reverse a linked list without using extra memory

• Iterate through the linked list and change the next pointers to reverse the list

• Use three pointers - prev, current, and next - to keep track of the reversed list

• Start with prev and current pointing to null and the head of the linked list respectively

• While traversing the list, update the next pointer of the current node to point to the previous node

• Move prev and current po...read more

Data structures are fundamental concepts in software engineering that organize and store data efficiently.

• Arrays: Simple and efficient for storing and accessing elements.

• Linked Lists: Dynamic and flexible, efficient for insertion and deletion.

• Stacks: LIFO structure, useful for managing function calls and undo operations.

• Queues: FIFO structure, ideal for managing tasks and scheduling.

• Trees: Hierarchical structure, used ...read more

The difference is that 'int arr[5]' creates an array on the stack, while 'malloc(5*sizeof(int))' allocates memory on the heap.

• int arr[5] creates an array of 5 integers on the stack, which is a fixed-size memory allocation.

• malloc(5*sizeof(int)) dynamically allocates memory on the heap, allowing for variable-size memory allocation.

• The memory allocated with malloc must be explicitly freed with free() to avoid memory leaks

I am a passionate software engineer with a strong background in computer science and experience in developing innovative solutions.

• Completed a Bachelor's degree in Computer Science from XYZ University

• Proficient in programming languages such as Java, Python, and C++

• Worked on various projects including a mobile app for tracking fitness goals

• Familiar with Agile development methodologies and version control systems like Gi

In 5 years, I see myself as a senior software engineer leading a team of developers on innovative projects.

• Continuing to enhance my technical skills and knowledge through ongoing learning and certifications

• Taking on more leadership responsibilities and mentoring junior team members

• Contributing to the development of cutting-edge software solutions for the company

• Possibly pursuing opportunities for advancement within the...read more

I tend to overthink details and can be overly critical of my own work.

• Overthinking details can lead to delays in completing tasks

• Being overly critical can hinder progress and confidence

Yes, I am interested in studying further to enhance my skills and stay updated with the latest technologies.

• I believe continuous learning is essential in the fast-paced tech industry

• Further studies can help me specialize in a specific area of software engineering

• Advanced degrees or certifications can open up new career opportunities

Global variables can be accessed from any part of the program while static variables are limited to the scope they are declared in.

• Global variables are declared outside of any function while static variables are declared inside a function with the static keyword.

• Global variables can be modified by any part of the program while static variables retain their value even after the function they are declared in has finished...read more

An optimised prime number program is required for Senior Software Engineer position.

• Use Sieve of Eratosthenes algorithm for better performance.

• Start with 2 as the first prime number and eliminate all its multiples.

• Continue eliminating multiples of primes until the desired range is reached.

• Use bitwise operations for faster calculations.

• Consider using multi-threading for larger ranges.

Program to implement a linked list with Add, delete, count and modify API features.

• Create a Node class with data and next pointer

• Create a LinkedList class with methods to add, delete, count and modify nodes

• Use a head pointer to keep track of the first node

• For add and modify, traverse the list to find the node to add/modify

• For delete, traverse the list to find the node to delete and update the next pointers

• For count, tr

Program for binary search algorithm

• Sort the array in ascending order

• Set the lower and upper bounds of the search range

• Calculate the middle index of the search range

• Compare the middle element with the target value

• If the middle element is equal to the target value, return its index

• If the middle element is greater than the target value, search the left half of the range

• If the middle element is less than the target value, ...read more

A function pointer is a variable that stores the memory address of a function.

• Function pointers can be used to pass functions as arguments to other functions.

• Syntax: return_type (*pointer_name)(parameter_list);

• Example: int (*func_ptr)(int, int) = &add;

• Example: int result = (*func_ptr)(2, 3);