Nagarro Web Developer Interview Questions and Answers

SQL command for creating a table

• Use CREATE TABLE statement

• Specify table name and column names with data types

• Add any constraints or indexes as needed

SQL commands for inserting, updating, and deleting data from a table.

• INSERT INTO table_name (column1, column2, column3) VALUES (value1, value2, value3);

• UPDATE table_name SET column1 = new_value1 WHERE condition;

• DELETE FROM table_name WHERE condition;

Truncate and drop are SQL commands used to remove data from a table.

• Truncate removes all data from a table but keeps the structure intact.

• Drop removes the entire table and its structure.

• Truncate is faster than drop as it only removes data.

• Drop cannot be undone while truncate can be rolled back.

• Truncate resets the identity of the table while drop does not.

• Examples: TRUNCATE TABLE table_name; DROP TABLE table_name;

C++ is an extension of C with object-oriented programming features.

• C++ supports classes and objects while C does not.

• C++ has better support for polymorphism and inheritance.

• C++ has a standard template library (STL) while C does not.

• C++ allows function overloading while C does not.

• C++ has exception handling while C does not.

I am a software developer with experience in Java and Python.

• I have a Bachelor's degree in Computer Science.

• I have worked on various projects involving web development and data analysis.

• I am proficient in Java and Python programming languages.

• I have experience with frameworks such as Spring and Django.

• I am familiar with databases such as MySQL and MongoDB.

I have always been fascinated by technology and its ability to solve complex problems.

• I enjoy problem-solving and logical thinking

• I have a natural curiosity for how things work

• I see the potential for technology to make a positive impact on society

• I have experience in programming and find it rewarding

• I am excited about the constant innovation and evolution in the IT industry

My strengths include problem-solving, adaptability, and teamwork. My weakness is public speaking.

• Strengths: problem-solving, adaptability, teamwork

• Examples: I have successfully solved complex coding problems, adapted to new technologies quickly, and collaborated effectively with team members.

• Weakness: public speaking

• Examples: I get nervous when speaking in front of large groups, but I am working on improving my present

I have the technical skills, experience, and passion to excel in this role.

• I have a strong background in software development, with expertise in multiple programming languages and frameworks.

• I have experience working on complex projects and collaborating with cross-functional teams.

• I am passionate about staying up-to-date with the latest technologies and trends in the industry.

• I am a quick learner and adaptable to new ...read more

Network layers are a hierarchical way of organizing communication protocols.

• Network layers provide a modular approach to networking.

• Each layer has a specific function and communicates with adjacent layers.

• The OSI model has 7 layers, while the TCP/IP model has 4 layers.

• Examples of layers include the physical layer, data link layer, network layer, transport layer, and application layer.

Deadlock is a situation where two or more processes are unable to proceed because they are waiting for each other to release resources.

• Occurs in multi-threaded/multi-process environments

• Can lead to system freeze or crash

• Prevention techniques include resource ordering and timeouts

• Example: Process A holds resource X and waits for resource Y, while Process B holds resource Y and waits for resource X

Paging and Segmentation are memory management techniques used by operating systems.

• Paging divides memory into fixed-size pages and stores them in physical memory.

• Segmentation divides memory into logical segments and stores them in physical memory.

• Paging allows for efficient use of physical memory and reduces fragmentation.

• Segmentation allows for protection and sharing of memory between processes.

• Examples of operating s...read more

I am a software developer with experience in various programming languages and frameworks.

• Proficient in Java, C++, and Python

• Familiar with web development using HTML, CSS, and JavaScript

• Experience with database management systems such as MySQL and MongoDB

• Strong problem-solving and analytical skills

• Worked on projects involving machine learning and artificial intelligence

Method overloading is having multiple methods with the same name but different parameters. Method overriding is having a subclass method with the same name and parameters as a superclass method.

• Method overloading is used to provide different ways of calling the same method with different parameters.

• Method overriding is used to provide a specific implementation of a method in a subclass that is already defined in the su...read more

Switch case is used for multiple conditions while if else is used for binary conditions.

• Switch case is faster than if else for multiple conditions.

• If else can handle complex conditions while switch case cannot.

• Switch case can only compare values of the same data type.

• If else can handle null values while switch case cannot.

• Example: switch (day) { case 1: console.log('Monday'); break; case 2: console.log('Tuesday'); brea...read more

Interface and abstract class are both used for abstraction in object-oriented programming.

• An interface is a collection of abstract methods that define a contract for a class to implement.

• An abstract class is a class that cannot be instantiated and may contain abstract methods.

• Interfaces are used to achieve multiple inheritance in Java.

• Abstract classes can have non-abstract methods and instance variables.

• An example of a...read more

Polymorphism is the ability of an object to take on many forms.

• It allows objects of different classes to be treated as if they were objects of the same class.

• It is achieved through method overriding and method overloading.

• Example: A shape class can have multiple subclasses like circle, square, etc. and all can be treated as shapes.

• Example: A method can have different implementations in different classes but with the sa

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows code reusability and saves time and effort in writing new code.

• The existing class is called the parent or base class, and the new class is called the child or derived class.

• The child class inherits all the properties and methods of the parent class and can also add its ...read more

Default case in switch case statement

• Default case is executed when no other case matches the switch expression

• It is optional and can be placed anywhere in the switch statement

• It is often used to handle unexpected input or errors

• It should always be the last case in the switch statement

I am a passionate software developer with a strong background in web development and a love for problem-solving.

• Experienced in HTML, CSS, JavaScript, and various web development frameworks

• Proficient in backend development using languages like Java, Python, and Node.js

• Familiar with database management systems such as MySQL and MongoDB

• Strong problem-solving skills and ability to work well in a team environment

I tend to get overly focused on details, which can sometimes slow down my progress.

• I have a tendency to spend too much time on perfecting small details

• I sometimes struggle with prioritizing tasks due to my focus on details

• I am working on improving my time management skills to balance detail-oriented work with efficiency

Yes, I have received offers from two other companies.

• Received offers from Company A and Company B

• Currently evaluating all offers to make an informed decision

• Considering factors like company culture, growth opportunities, and compensation

I would like to join Google because of their innovative projects and work culture.

• Google is known for its cutting-edge technology and innovative projects.

• They have a strong focus on employee well-being and work-life balance.

• Google offers opportunities for career growth and development.

• The company has a diverse and inclusive work culture.

• Google is a leader in the tech industry with a global presence.

Yes, I have worked in multiple teams in various projects.

• Worked in a team of developers to create a new software application

• Collaborated with designers, testers, and project managers to meet project deadlines

• Participated in daily stand-up meetings to discuss progress and roadblocks

Yes, they are similar.

• All 8 metal balls are of the same material.

• They have the same size and weight.

• They have the same physical properties.

• They are interchangeable in any given situation.