CGI Group Interview Questions, Process, and Tips

Q1. What is Dependency Injection
Ans. 
Dependency Injection is a design pattern in which components are given their dependencies rather than creating them internally.
• In Dependency Injection, the dependencies of a class are injected from the outside, typically through constructor injection or setter injection.

• This helps in achieving loose coupling between classes, making the code more modular and easier to test.

• Example: Spring Framework uses Dependency Injec...read more
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Q2. How is exception handled in Inheritance
Ans. 
Exceptions in inheritance are handled using try-catch blocks in the subclass.
• Inherited methods can throw exceptions that need to be caught in the subclass.

• Subclass can override superclass methods and handle exceptions differently.

• Superclass methods can declare checked exceptions that subclasses must handle.

• Exceptions can be rethrown or wrapped in a new exception in the subclass.
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Q3. Define a immutable class
Ans. 
Immutable class is a class whose instances cannot be modified after creation.
• Immutable classes have all fields as final and private.

• Immutable classes do not have any setter methods.

• Examples of immutable classes in Java are String, Integer, and LocalDate.
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Q1. Different design pattern and how you have implement in projects
Ans. 
I have implemented design patterns like Singleton, Factory, and Observer in various projects.
• Implemented Singleton pattern to ensure only one instance of a class exists.

• Utilized Factory pattern to create objects without specifying the exact class of object that will be created.

• Used Observer pattern to establish a one-to-many dependency between objects, so that when one object changes state, all its dependents are notif
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Q2. How to improve the performance of a running application.
Ans. 
To improve the performance of a running application, consider optimizing code, database queries, caching, and server resources.
• Optimize code by identifying and fixing bottlenecks, reducing unnecessary loops, and improving algorithms.

• Optimize database queries by using indexes, avoiding unnecessary joins, and limiting the amount of data retrieved.

• Implement caching mechanisms to store frequently accessed data in memory, r...read more
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It is very easy to crack if learn
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Dicuss very important topic

Q1. Very moderate question
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Q2. What is your hobbies
Ans. 
My hobbies include hiking, photography, and playing the guitar.
• Hiking: I enjoy exploring nature trails and challenging myself physically.

• Photography: I love capturing moments and landscapes through my camera lens.

• Playing the guitar: I find relaxation and creativity in strumming chords and learning new songs.
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Q1. Not easy to crack
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Q2. What is the best of this
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Q1. What is your passion in life
Ans. 
My passion in life is creating visually appealing and informative data visualizations that help people understand complex information.
• I love using colors, shapes, and interactive elements to make data come to life

• I enjoy finding creative ways to present data in a clear and engaging manner

• I am passionate about using data visualization to drive decision-making and spark insights

• Examples: creating interactive dashboards, ...read more
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Q2. They are how many days in a week
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Q1. Angular and js concepts
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Q1. What is DNS please explain
Ans. 
DNS stands for Domain Name System, which translates domain names to IP addresses.
• DNS is like a phone book for the internet, translating human-readable domain names (like google.com) to IP addresses (like 172.217.3.206).

• It helps users access websites by typing in easy-to-remember domain names instead of complex IP addresses.

• DNS servers store records of domain names and their corresponding IP addresses, allowing for effi...read more
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Q2. What is DHCP please explain
Ans. 
DHCP stands for Dynamic Host Configuration Protocol, used to automatically assign IP addresses to devices on a network.
• DHCP eliminates the need for manual IP address configuration on each device

• It assigns IP addresses dynamically, allowing for efficient use of available addresses

• DHCP servers lease IP addresses to devices for a specific period of time

• DHCP also provides other network configuration information, such as su...read more
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Q1. Technical expertise
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Q2. Analytical skill
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Previous experience for revelant job roles

Q1. Communication to be evaluated
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Q2. Interpersonal skill
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Q1. What is regression testing
Ans. 
Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.
• Regression testing is performed after code changes to verify that the existing features still work correctly.

• It helps in identifying any defects introduced by new code changes.

• Regression testing can be automated to save time and effort.

• Examples include running test cas...read more
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Q2. What is different between smoke and sanitary
Ans. 
Smoke testing is a quick test to check if the basic functionalities of the software are working fine, while sanity testing is a more thorough test to check if the specific functionalities are working as expected.
• Smoke testing is a subset of sanity testing

• Smoke testing is done to check if the build is stable enough for further testing

• Sanity testing is done to check specific functionalities after changes have been made

• Sm...read more
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