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Cisco Interview Questions and Answers
311 Interview questions
Java is a high-level, object-oriented programming language designed for portability and ease of use across platforms.
Developed by Sun Microsystems in 1995, now owned by Oracle.
Java is platform-independent due to the Java Virtual Machine (JVM).
It follows the 'write once, run anywhere' (WORA) principle.
Commonly used for web applications, mobile apps (Android), and enterprise software.
Syntax is similar to C++, making...
Implementing a rate limiter using a sliding window algorithm to control request rates efficiently.
A sliding window allows tracking requests over a specified time frame.
It divides time into fixed intervals (e.g., 1 minute) and counts requests in the current interval.
When a request comes in, check if the count exceeds the limit; if yes, deny the request.
Example: Allow 100 requests per minute; if 101st request comes ...
Merge k sorted arrays into a single sorted array efficiently.
Use a min-heap to efficiently get the smallest element from the k arrays.
Initialize the heap with the first element of each array.
Extract the minimum element from the heap, and add the next element from the same array to the heap.
Repeat until all elements from all arrays are processed.
Time complexity is O(N log k), where N is the total number of elements...
The 3Sum problem involves finding unique triplets in an array that sum to zero.
Sort the array to facilitate easier triplet finding.
Use a loop to fix one element and apply two-pointer technique for the rest.
Skip duplicates to ensure unique triplets are counted.
Example: For input [-1, 0, 1, 2, -1, -4], the output is [[-1, -1, 2], [-1, 0, 1]].
Formatting a URL involves structuring it correctly for web access, ensuring it adheres to standards and is user-friendly.
Use 'https://' for secure connections. Example: 'https://www.example.com'.
Ensure proper encoding of special characters. Example: 'Hello World' becomes 'Hello%20World'.
Maintain a clear structure: scheme, host, path, and query parameters. Example: 'https://www.example.com/path?query=value'.
Avoid u...
Python functions can return multiple values using tuples, lists, or dictionaries, allowing flexibility in return types.
Python functions can return multiple values as a tuple: `def func(): return 1, 2`.
You can also return a list: `def func(): return [1, 2, 3]`.
Returning a dictionary allows named access: `def func(): return {'a': 1, 'b': 2}`.
Using `*args` and `**kwargs` allows for variable-length arguments and keywo...
Creating and using class instances in Python for automation testing.
Define a class using the 'class' keyword. Example: 'class MyClass:'.
Create an instance of the class by calling it. Example: 'my_instance = MyClass()'.
Access class attributes and methods using the instance. Example: 'my_instance.method_name()'.
Use '__init__' method for initializing instance variables. Example: 'def __init__(self, value): self.value...
Financial ratios are metrics used to evaluate a company's financial performance and stability.
Liquidity Ratios: Measure a company's ability to meet short-term obligations. Example: Current Ratio = Current Assets / Current Liabilities.
Profitability Ratios: Assess a company's ability to generate profit. Example: Net Profit Margin = Net Income / Revenue.
Leverage Ratios: Indicate the level of debt relative to equity. ...
Yes, a company can have positive cash flow despite reporting a net loss due to non-cash expenses and working capital changes.
Non-cash expenses like depreciation and amortization reduce net income but do not affect cash flow.
Changes in working capital, such as collecting receivables faster or delaying payables, can improve cash flow.
For example, a company may invest heavily in R&D, leading to a net loss, but st...
Designing a gateway involves creating a system for data transfer and communication between networks or applications.
Define the purpose: Identify what the gateway will connect (e.g., IoT devices to cloud).
Choose the protocol: Decide on protocols like HTTP, MQTT, or WebSocket for communication.
Implement security: Use encryption (e.g., TLS) and authentication methods to secure data.
Consider scalability: Design the ga...
Cisco Interview Experiences
386 interviews found
Anonymous
Selected
I appeared for an interview in Apr 2025, where I was asked the following questions.
- Q1. Inheritance in Java allows a class (subclass) to inherit properties and methods from another class (superclass). This promotes code reusability and establishes a hierarchical relationship between classes. ...
- Ans.
Inheritance in Java enables code reusability and establishes class hierarchies.
Single Inheritance: Class Dog inherits from class Animal.
Multilevel Inheritance: Class Puppy inherits from Dog, which inherits from Animal.
Hierarchical Inheritance: Classes Dog and Cat both inherit from Animal.
Multiple Inheritance (through interfaces): Class implements interfaces Runnable and Comparable.
Hybrid Inheritance: A class inherits f...
- Q2. Structured Data: Organization: Follows a predefined schema, often stored in relational databases with rows and columns. Examples: Employee tables in databases, banking transaction data, website-related dat...
Fifty multiple-choice questions on C programming, some networking topics, and role-related inquiries.
(2 Questions)
- Q1. After clearing the first round, there are two additional rounds on the same day: Technical Round (TR) and Managerial Round (MR). The TR begins at 8:30 AM and lasts approximately 50 to 55 minutes. During th...
- Q2. Resume : All things . Networking : Gateway , Lookup address , IP and types , Firewalls and types , Routers SQL : Update , Insert , alter , count ......joins , left vs right , normalization
Selected
I applied via Job Portal and was interviewed in Dec 2024. There were 4 interview rounds.
Topics - mcq of algorithms, networking, dbms
(2 Questions)
- Q1. Based on resume
- Q2. Questions on linked list, tree,
(2 Questions)
- Q1. About how you approach a problem
- Ans.
I approach problems systematically, breaking them down into manageable parts and analyzing each component for effective solutions.
Identify the problem clearly: For example, if a project is behind schedule, determine the specific reasons for the delay.
Gather relevant information: Research similar cases or consult with team members to understand different perspectives.
Break the problem into smaller parts: If facing a com...
- Q2. Managerial questions on situations
(1 Question)
- Q1. Basic hr questions
It is a very Easy Aptitude test, with only general questions
(2 Questions)
- Q1. Technical general questions were asked
- Q2. Basic questions about the position you've applied for
(3 Questions)
- Q1. Technical interview - Regarding the position you've applied for.
- Q2. Managerial interview - Normal conversation easy to crack
- Q3. Hr Interview - General questions about relocation, salary and queries you have if any.
Selected
I appeared for an interview in Jan 2025.
(2 Questions)
- Q1. Technical discussion
- Q2. One-to-one round , technical discussion
(1 Question)
- Q1. HR Round, salary
I appeared for an interview in Aug 2024.
Online assessments consisting of Linked list , stacks , string manipulations with medium difficulty for string manipulation and easy traversal for linked lists.
(3 Questions)
- Q1. Write code for rate limiter in python or any language? If don't know rate limiter , then they will explain the logic but needs to be alligned with rate limiting logic.
- Ans.
Rate limiter code implementation in Python
Use a dictionary to store the timestamps of each request
Check the dictionary to see if the request should be allowed based on the rate limit
Update the dictionary with the current timestamp for each request
- Q2. Check the logic of your code , if you find any limitations.
- Ans.
Check code logic for limitations
Review code for potential edge cases
Test code with different inputs to identify any issues
Consider scalability and performance implications of code
Ensure error handling is robust and comprehensive
- Q3. Managerial and Technical Round 3 with same set of questions as above.
(2 Questions)
- Q1. Kubernetes pods , deployments , replicas , deamon sets , aws services and experience in mitigating issues in devops.
- Q2. Explain full pipeline which you worked from Code Integration to deployment and security check. What all python library used , have you used flask and other libraries for request and response.
- Ans.
I have experience working on full pipeline from code integration to deployment with security checks. Used Flask and other Python libraries for request and response handling.
Used Git for version control and continuous integration tools like Jenkins for automated builds
Utilized Docker for containerization and Kubernetes for orchestration
Implemented security checks using tools like SonarQube and OWASP ZAP
Used Flask for bu...
Interview Preparation Tips
Radheshyam Dhote
Write a code for Fibonacci series?
(1 Question)
- Q1. What is aws and explain how you deployed your project.
- Ans.
AWS is a cloud computing platform that offers a wide range of services for storage, computing, networking, databases, and more.
AWS stands for Amazon Web Services
I deployed my project on AWS using services like EC2 for virtual servers, S3 for storage, and RDS for databases
I used AWS Elastic Beanstalk for easy deployment and scaling of my application
I configured security groups and IAM roles to ensure secure access to my...
(1 Question)
- Q1. What is AI, explain its application
- Ans.
AI stands for Artificial Intelligence, it is the simulation of human intelligence processes by machines.
AI is used in various applications such as virtual assistants (e.g. Siri, Alexa), recommendation systems (e.g. Netflix, Amazon), autonomous vehicles, and facial recognition technology.
AI can be applied in healthcare for tasks like disease diagnosis, personalized treatment plans, and drug discovery.
AI is also used in ...
(2 Questions)
- Q1. Development topics: LWC related questions, trigger, batch apex, governor limits, future method
- Q2. Admin Topics: Flow, price rules, product rules, some scenario based questions
(2 Questions)
- Q1. LWC, Aura, Test Class, Best Practice - trigger, Decorators, Error Handling
- Q2. Rest API, Deployments, Some scenario based questions
(1 Question)
- Q1. Managerial Round: Intro & Scenario based questions
Selected
I applied via Instagram and was interviewed in Jul 2024. There were 3 interview rounds.
(2 Questions)
- Q1. It's all from your Resume only Basic coding questions
- Q2. Be Honest in resume Many technical questions It's about 30 to 40 mins Be confident Show you are enthusiastic and willingness to learn
(3 Questions)
- Q1. Its all about your understanding of technologies Your opinions with clarity
- Q2. Be active and give full pledged answers with crystal clear explanation Otherwise they will not move forward
- Q3. Being confident is only the thing
(3 Questions)
- Q1. Explain about yourself
- Ans.
I am a highly motivated and detail-oriented individual with a strong background in project management and team leadership.
Experienced in project management and team leadership
Detail-oriented and highly motivated
Strong communication and interpersonal skills
- Q2. The HR explain the role package and everything
- Q3. This is also elimination round.Being active is enough
I appeared for an interview in Aug 2024.
Code-with-cisco having coding questions and mcq
(2 Questions)
- Q1. Different scheduling algorithms in OS?
- Ans.
Different scheduling algorithms in OS determine how tasks are prioritized and executed.
First-Come, First-Served (FCFS)
Shortest Job Next (SJN)
Round Robin (RR)
Priority Scheduling
Multi-Level Queue Scheduling
- Q2. Resume go-through: projects and intern
(2 Questions)
- Q1. Networking: Transfer packet from one device to another
- Q2. Contact dictionary- data structure used and time complexity
- Ans.
Contact dictionary can be implemented using hash table for fast lookups with O(1) time complexity.
Use a hash table to store contacts with keys as names and values as contact information.
Example: { 'John Doe': '555-1234', 'Jane Smith': '555-5678' }
Time complexity for searching, inserting, and deleting contacts is O(1) with a hash table.
(2 Questions)
- Q1. Basic networking
- Q2. Why cisco, what is cisco?
- Ans.
Cisco is a multinational technology conglomerate known for networking hardware, software, and services.
Cisco is a leading provider of networking equipment and solutions.
They offer a wide range of products including routers, switches, and security devices.
Cisco also provides software solutions for network management and security.
The company offers services such as consulting, technical support, and training.
Cisco is kno...
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