Cognite Interview Questions and Answers

First round is the written test

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Prepare classic dsa questions

Q1. Explain about company which you known
Ans. 
I know about XYZ Company, a leading software development firm specializing in mobile applications.
• XYZ Company was founded in 2005 and has since developed numerous successful mobile apps for clients in various industries.

• The company has a team of experienced software developers, designers, and project managers who work together to deliver high-quality products.

• Some of the notable apps developed by XYZ Company include a ...read more
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Q2. Explain the projects
Ans. 
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

• Created a mobile app using Flutter for task tracking

• Implemented RESTful APIs for communication between frontend and backend systems
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Basic aptitude questions like CAT level

Leetcode questions were there

Q1. Introduction , guesstimate , DSA question
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Q2. Puzzles
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Assignment was to create an API for an expenses sharing application where users can input the total amount and the people to be shared the amount with and each individual amount in terms of either actual amount, percentage or split equally

Q1. Difference between process and threads
Ans. 
Processes are independent instances of a program, while threads are smaller units within a process sharing resources.
• Processes have their own memory space, while threads share the same memory space within a process.

• Processes are heavyweight, requiring more resources, while threads are lightweight.

• Processes communicate with each other through inter-process communication mechanisms, while threads can communicate directly...read more
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Q2. What is indexing in DBMS
Ans. 
Indexing in DBMS is a technique used to improve the performance of queries by allowing faster retrieval of data.
• Indexes are data structures that store a small portion of the table data in an optimized format for quick retrieval.

• They help in speeding up data retrieval operations like SELECT, UPDATE, DELETE queries.

• Examples of indexes include primary keys, unique keys, and composite keys.
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Q3. Examples and description of asymmetric encryption alogorithms
Ans. 
Asymmetric encryption algorithms use a pair of keys to encrypt and decrypt data, providing secure communication.
• RSA (Rivest-Shamir-Adleman) is a popular asymmetric encryption algorithm.

• Elliptic Curve Cryptography (ECC) is another commonly used asymmetric encryption algorithm.

• Asymmetric encryption is slower than symmetric encryption but provides better security.

• Public key is used for encryption and private key is used f
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Q4. Which sorting method is beneficial in which scenario
Ans. 
Different sorting methods are beneficial in different scenarios based on factors like time complexity, space complexity, and input size.
• Quick Sort: Best for large datasets due to its average time complexity of O(n log n)

• Bubble Sort: Simple and easy to implement, but inefficient for large datasets with its time complexity of O(n^2)

• Merge Sort: Stable and efficient for large datasets with its time complexity of O(n log n)

• ...read more
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Q1. What are ACID properties in DBMS
Ans. 
ACID properties are a set of properties that guarantee reliability and consistency in database transactions.
• Atomicity: Ensures that either all operations in a transaction are completed successfully or none at all.

• Consistency: Ensures that the database remains in a consistent state before and after the transaction.

• Isolation: Ensures that the execution of multiple transactions concurrently does not interfere with each ot...read more
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Q2. Underlying data structure in Indexing and its time complexity
Ans. 
Indexing typically uses data structures like B-trees or hash tables for efficient retrieval, with time complexity of O(log n) or O(1) respectively.
• Common data structures for indexing include B-trees and hash tables

• B-trees are typically used for indexing in databases due to their balanced nature and efficient search operations

• Hash tables are used for indexing in scenarios where constant time lookup is desired, but may h
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Q3. Time complexity of a recursive fibonacci code
Ans. 
Time complexity of recursive fibonacci code is O(2^n)
• The time complexity of a recursive fibonacci code is exponential, O(2^n)

• This is because each call branches into two recursive calls, leading to exponential growth

• For example, calculating fibonacci(5) would result in 15 function calls
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Q4. The protocol behind Web Sockets (because it was in my resume)
Ans. 
Web Sockets is a communication protocol that provides full-duplex communication channels over a single TCP connection.
• Web Sockets allow for real-time, bi-directional communication between a client and a server.

• They are commonly used in chat applications, online gaming, and live data streaming.

• Web Sockets use the ws:// or wss:// protocol scheme in URLs.

• The protocol is initiated with a handshake between the client and se...read more
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CHATBOT RELATED QUESTIONS

Q1. CHATBOT QA QUESTIONS
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Q1. SIMPLE HR QUESTIONS
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Q1. They believe they are good when they are not. Maquila company
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Q2. Lack of skills. no what they promise.
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Q1. About salary and previous job profile
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Q1. About what kind of projects we did in the past
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Q1. Ask you about the particular field wise knowledge and past project related questions
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Q1. Never happens, they just stall you
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Q1. What is dns port no?
Ans. 
DNS port number is 53.
• DNS port number is used for DNS queries and responses.

• It is a well-known port number, which is 53.

• DNS uses both TCP and UDP protocols on port 53.
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Q2. What is ssh port no?
Ans. 
SSH port number is 22.
• SSH port number is used for secure communication over a network.

• Default port number for SSH is 22.

• Port number can be changed for security reasons.

• Example: ssh user@hostname -p 2222
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Q3. What brust force attack?
Ans. 
A brute force attack is a trial-and-error method used by hackers to crack passwords or encryption by systematically trying all possible combinations.
• Brute force attacks are time-consuming but effective against weak passwords.

• Hackers use automated tools to try all possible combinations until the correct one is found.

• Examples include trying all possible 4-digit PIN codes or dictionary words as passwords.

• Strong passwords ...read more
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Q1. Tell me about your self?
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Behavorial type mostly than essay mof 200 words