Cognizant Junior Software Engineer Interview Questions, Process, and Tips

Q1. About database and visual studio questions
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Q1. About salary expectation
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Q1. What you know about SQL
Ans. 
SQL is a domain-specific language used for managing and manipulating relational databases.
• SQL stands for Structured Query Language

• It is used to communicate with databases to retrieve, insert, update, and delete data

• Common SQL commands include SELECT, INSERT, UPDATE, DELETE

• SQL can be used to create and modify database schemas

• Joins are used to combine data from multiple tables in SQL
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Q2. What is the software you worked on
Ans. 
I worked on a web-based project management software for tracking tasks and deadlines.
• Developed front-end using React.js

• Implemented back-end using Node.js and MongoDB

• Integrated third-party APIs for additional functionality
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Q3. What you know in java
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I have knowledge in Java programming language including OOP concepts, data structures, multithreading, and exception handling.
• Strong understanding of Object-Oriented Programming (OOP) principles

• Experience with data structures like arrays, linked lists, stacks, and queues

• Knowledge of multithreading and synchronization in Java

• Familiarity with exception handling and error management

• Proficiency in using Java libraries and
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Q4. What project you worked
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Q5. Which technology you used
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I have experience with technologies such as Java, Python, SQL, HTML, CSS, and JavaScript.
• Java

• Python

• SQL

• HTML

• CSS

• JavaScript
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Q1. Explain what is java
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Java is a high-level programming language known for its portability, security, and object-oriented features.
• Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM)

• It is object-oriented, allowing for modular and reusable code

• Java is known for its security features, such as sandboxing and encryption

• Popular frameworks and libraries in Java include Spring, Hibernate, and Apache Stru
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Q2. What is react hooks
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React Hooks are functions that let you use state and other React features without writing a class.
• React Hooks were introduced in React 16.8.

• They allow you to use state and other React features in functional components.

• Some commonly used hooks are useState, useEffect, useContext, and useRef.

• Hooks provide a more concise and readable way to work with React components.
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Q1. Focus on Core java.
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Q1. More core Java ques.
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Q1. Salary discussion and reason for leaving previous organization.
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Q2. Salary discussion and region for leaving the previous org.
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Q1. What are Arrays and difference between Arrays and ArrayList
Ans. 
Arrays are a collection of elements of the same data type, while ArrayList is a dynamic array that can grow or shrink in size.
• Arrays have a fixed size, while ArrayList can dynamically resize.

• Arrays can only store elements of the same data type, while ArrayList can store elements of different data types.

• Arrays are faster in terms of performance compared to ArrayList.

• Arrays are part of the core Java language, while Array...read more
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Q2. What is Pointers ?
Ans. 
Pointers are variables that store memory addresses of other variables in programming languages like C and C++.
• Pointers allow direct access to memory locations

• They are used for dynamic memory allocation

• Pointers can be used to pass variables by reference

• Example: int *ptr; ptr = # // ptr now points to the memory address of num
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Q3. Stored Procedure in SQL
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Stored procedures in SQL are precompiled SQL statements that are stored in the database for reuse.
• Stored procedures can improve performance by reducing network traffic and increasing security.

• They can be used to encapsulate business logic and complex queries.

• Stored procedures can accept input parameters and return output parameters or result sets.

• Examples: CREATE PROCEDURE, EXECUTE PROCEDURE.
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