TCS Software Engineer Interview Questions, Process, and Tips

Q1. What's return statement in java
Ans. 
The return statement in Java is used to explicitly return a value from a method.
• The return statement is followed by the value that is to be returned from the method.

• It can only be used within a method body.

• Once a return statement is executed, the control is transferred back to the caller of the method.
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Q2. What are get set methods
Ans. 
Get set methods are used in object-oriented programming to retrieve and update the values of private variables.
• Get methods are used to retrieve the value of a private variable.

• Set methods are used to update the value of a private variable.

• They are commonly used to ensure data encapsulation and control access to class variables.
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Q3. What is the difference between an interface and an abstract class in Java?
Ans. 
Interface is a contract specifying methods that a class must implement, while abstract class can have both implemented and abstract methods.
• Interface cannot have method implementations, while abstract class can have both implemented and abstract methods.

• A class can implement multiple interfaces but can only extend one abstract class.

• Interfaces are used to achieve multiple inheritance in Java.

• Abstract classes can have c...read more
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Q4. How do you implement a stack in Java using an array?
Ans. 
Implement a stack in Java using an array
• Create an array to store the elements of the stack

• Keep track of the top of the stack using an index variable

• Implement push() to add elements to the stack

• Implement pop() to remove elements from the stack

• Example: String[] stackArray = new String[10];
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Q5. What is the difference between a HashMap and a TreeMap in Java?
Ans. 
HashMap is unordered and uses hashing to store key-value pairs, while TreeMap is ordered and uses a red-black tree to store key-value pairs.
• HashMap uses hashing to store key-value pairs, allowing for O(1) time complexity for get and put operations.

• TreeMap uses a red-black tree to store key-value pairs, maintaining order based on the keys.

• HashMap does not guarantee any specific order of elements, while TreeMap maintains...read more
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Aptitude round
English exam
Maths tricky questions exam
Coding 1 easy 1 tuff

Q1. Difference between css and css3
Ans. 
CSS is the standard styling language for websites, while CSS3 is the latest version with new features like animations and transitions.
• CSS is the standard styling language used for describing the look and formatting of a document written in HTML.

• CSS3 is the latest version of CSS with new features like animations, transitions, gradients, and more.

• CSS3 introduced new layout modules like Flexbox and Grid, making it easier ...read more
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Q2. Tell disadvantages of your projects
Ans. 
Some disadvantages of my projects include scalability issues, lack of documentation, and limited testing.
• Scalability issues: The project was not designed to handle a large amount of data or users, leading to performance issues.

• Lack of documentation: There was insufficient documentation on the codebase, making it difficult for new team members to onboard or for future maintenance.

• Limited testing: Due to time constraints...read more
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Q1. Are you okay for night shift
Ans. 
Yes, I am okay with night shifts as I am comfortable working during those hours.
• I have previous experience working night shifts in my previous job.

• I am a night owl and tend to be more productive during late hours.

• I understand the importance of round-the-clock support in the software industry.
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Q2. Are you okay with reallocation
Ans. 
Yes, I am okay with reallocation as it is a common practice in the software engineering field.
• I am comfortable with reallocation as it is a common practice in software development.

• I understand that reallocation may be necessary for project requirements or team dynamics.

• I am adaptable and willing to take on new challenges that may come with reallocation.
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Q1. Difference between pojo and bean
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Q2. Explain different joins in sql
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Q1. Explain oops concepts in java
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Q2. C
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