Cross Country Infotech Interview Questions, Process, and Tips

Q1. Self Introduction
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Q1. When did you complete your B.E.?
Ans. 
I completed my B.E. in 2015.
• I completed my B.E. in 2015.

• I graduated with a Bachelor's degree in Engineering in 2015.

• My B.E. was completed in 2015.
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Q2. When did you complete your 12th?
Ans. 
I completed my 12th in the year 2010.
• I completed my 12th in 2010.

• I finished my 12th grade in 2010.

• My 12th grade was completed in 2010.
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Q3. Why there is year gap? Was there any back log during your Graduation?
Ans. 
I took a year gap to gain practical experience and enhance my skills.
• To gain practical experience and enhance my skills

• To explore different technologies and frameworks

• To work on personal projects and contribute to open-source projects

• To attend workshops, seminars, and training programs

• To take up internships or freelance projects
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Q4. In which year you completed your Graduation?
Ans. 
I completed my graduation in the year 2015.
• I completed my graduation in 2015.

• I graduated in the year 2015.

• My graduation was completed in 2015.
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Q5. Do you have any Java certficate? If no then please leave you are rejected.
Ans. 
Java certification is not mandatory for a Java Developer role.
• Certification is not a measure of practical skills and experience.

• Experience and skills are more important than certification.

• Certification can be helpful in some cases, but not mandatory.

• Certification can be expensive and time-consuming.

• Employers may value certification differently.

• Examples of Java certifications: Oracle Certified Professional Java SE 11 De
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Q6. We don't accept one who have backlogs in any year during graduation, if you have any back log then please leave you are not selected for next Technical Round.
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Q1. 1. What are four pillars of OOPS ?
Ans. 
The four pillars of OOPS are Abstraction, Encapsulation, Inheritance, and Polymorphism.
• Abstraction: Hiding implementation details and showing only necessary information.

• Encapsulation: Binding data and methods together to protect data from outside interference.

• Inheritance: Creating new classes from existing ones, inheriting properties and methods.

• Polymorphism: Ability of objects to take on multiple forms or behaviors.
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Q2. 2. Give me Real life example of Polymorphism
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Polymorphism is when an object can take on multiple forms and behave differently based on the context.
• A car can be a vehicle, but it can also be a sports car or a family car, each with different behaviors.

• A shape can be a square, rectangle, or triangle, each with different methods for calculating area and perimeter.

• A media player can play different types of media, such as audio or video, each with different playback co
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Q3. 3. What is difference between Abstract class and Interface.
Ans. 
Abstract class can have implementation while interface cannot. A class can implement multiple interfaces but can only extend one abstract class.
• Abstract class can have constructors while interface cannot.

• Abstract class can have instance variables while interface cannot.

• Abstract class can have non-abstract methods while interface can only have abstract methods.

• A class can implement multiple interfaces but can only exten...read more
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Q4. 4. Can we have multi level inheritance in Java
Ans. 
Yes, Java supports multi level inheritance.
• Multi level inheritance is the process of inheriting a class from another derived class.

• It helps in creating a hierarchy of classes with each level inheriting properties from the previous level.

• For example, class C can inherit from class B, which in turn inherits from class A.

• Java does not support multiple inheritance, where a class can inherit from multiple classes at the sam
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Q5. 5. What is difference between composition and inheritance
Ans. 
Composition is a way to combine objects to create complex structures, while inheritance is a way to create new classes based on existing ones.
• Composition is a 'has-a' relationship, where an object contains other objects as its parts.

• Inheritance is an 'is-a' relationship, where a subclass inherits properties and behaviors from its superclass.

• Composition allows for greater flexibility and modularity in design, as objects...read more
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Q6. 6. What is exception handing
Ans. 
Exception handling is the process of handling errors and exceptions that occur during program execution.
• Exceptions are objects that represent errors or exceptional situations that occur during program execution.

• Exception handling involves catching and handling these exceptions to prevent program crashes.

• Java provides try-catch-finally blocks for handling exceptions.

• Examples of exceptions include NullPointerException, A...read more
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Q7. 7. What is difference between throw and throws
Ans. 
throw is used to explicitly throw an exception while throws is used to declare an exception that a method may throw.
• throw is used within a method to throw an exception when a certain condition is met

• throws is used in the method signature to declare the exceptions that the method may throw

• throw is followed by an instance of an exception class while throws is followed by the name of the exception class

• throw is used to ha...read more
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Q8. 8. Can we have multiple try block
Ans. 
Yes, we can have multiple try blocks in Java.
• Multiple try blocks can be used to handle different exceptions separately.

• Each try block must have at least one catch or finally block.

• Nested try blocks can also be used.

• Example: try { //code } catch (Exception e) { //code } try { //code } catch (IOException e) { //code }

• Example of nested try blocks: try { try { //code } catch (Exception e) { //code } } catch (Exception e) {
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Q9. 9. When is memory allocated, when class is created or instance is created or when it is?
Ans. 
Memory is allocated when an instance of a class is created.
• Memory allocation happens when an object is created using the 'new' keyword.

• Static variables are allocated memory when the class is loaded.

• Memory is released when the object is no longer referenced or when the program terminates.
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Q10. 10. What is stack in programming?
Ans. 
A stack is a data structure that follows the Last In First Out (LIFO) principle.
• Elements are added and removed from the top of the stack.

• Push() adds an element to the top of the stack.

• Pop() removes the top element from the stack.

• Peek() returns the top element without removing it.

• Used in programming for function calls, expression evaluation, and memory management.
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Q11. 11. What is queue in programming?
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A queue is a data structure that follows the FIFO (First In First Out) principle.
• Elements are added to the back of the queue and removed from the front.

• Common operations include enqueue (add to back) and dequeue (remove from front).

• Examples include a line of people waiting for a movie or a printer queue.

• Java provides the Queue interface and its implementations like LinkedList and PriorityQueue.
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Q12. 12. Difference between error and exception
Ans. 
Errors are unrecoverable, while exceptions are recoverable.
• Errors are caused by the environment in which the application is running, while exceptions are caused by the application itself.

• Errors cannot be handled by the application, while exceptions can be handled using try-catch blocks.

• Examples of errors include OutOfMemoryError and StackOverflowError, while examples of exceptions include NullPointerException and Array
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Q13. 13. Other than inheritance what you will use to connect two classes?
Ans. 
We can use composition, aggregation, or association to connect two classes.
• Composition is a strong form of aggregation where the lifetime of the contained object is controlled by the container object.

• Aggregation is a weaker form of composition where the contained object has an independent lifecycle.

• Association is a relationship between two classes where one class uses the functionality of another class.

• Examples of asso...read more
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Q14. 14. What are different types of Access Modifiers in Java?
Ans. 
Access modifiers in Java are used to set the accessibility of classes, methods, and variables.
• There are four types of access modifiers in Java: public, private, protected, and default.

• Public: accessible from anywhere in the program.

• Private: accessible only within the same class.

• Protected: accessible within the same class, same package, and subclasses.

• Default: accessible within the same package only.
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Q15. 15. What is protected ?
Ans. 
protected is a Java access modifier that allows access within the same package and subclasses.
• Protected members can be accessed within the same package and subclasses.

• It is used to provide encapsulation and prevent direct access from outside the class.

• Protected members can be accessed using the dot operator.

• Example: protected int num; can be accessed in a subclass using obj.num;
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Q16. 16. Can subclass access private methods parent class?
Ans. 
No, subclass cannot access private methods of parent class.
• Private methods are only accessible within the same class where they are defined.

• Subclasses can access protected and public methods of parent class.

• Private methods can be accessed indirectly through public or protected methods of parent class.
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Q17. 17. Can subclass inherit the properties of Parent class if we not load parent class
Ans. 
No, subclass cannot inherit properties of parent class if parent class is not loaded.
• In order for a subclass to inherit properties of a parent class, the parent class must be loaded.

• If the parent class is not loaded, the subclass will not have access to its properties.

• This is because inheritance is a compile-time concept and requires the parent class to be present during compilation.

• Attempting to access properties of a...read more
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Q18. 18. Can class be private?
Ans. 
Yes, a class can be private in Java.
• A private class can only be accessed within the same outer class.

• It cannot be accessed from outside the class or even from subclasses.

• Private classes are often used for implementation details that should not be exposed to other classes.

• Example: private class Node in a LinkedList implementation.
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Q19. 19. What are collections?
Ans. 
Collections are objects that group multiple elements into a single unit.
• Collections are used to store, retrieve, manipulate and communicate aggregate data.

• Java provides a set of interfaces and classes that implement various types of collections.

• Examples of collections include List, Set, Map, Queue, etc.

• Collections can be used to improve code readability, reusability, and performance.
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Q20. 20. What are different types of collections?
Ans. 
Collections are used to store and manipulate groups of objects in Java. There are three main types of collections.
• The three main types of collections are List, Set, and Map.

• List is an ordered collection that allows duplicates. Example: ArrayList.

• Set is an unordered collection that does not allow duplicates. Example: HashSet.

• Map is a collection that maps keys to values and does not allow duplicate keys. Example: HashMap
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Q21. 21. Difference between array and heap?
Ans. 
Arrays are fixed in size and stored in stack memory, while heap is dynamic and stored in heap memory.
• Arrays are declared with a fixed size, while heap can grow or shrink dynamically.

• Arrays are stored in stack memory, while heap is stored in heap memory.

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

• Examples of arrays include int[], char[], and String[], while examp...read more
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Q22. 22. Can we add duplicates to Set?
Ans. 
No, Set does not allow duplicates.
• Set is a collection that does not allow duplicates.

• If you try to add a duplicate element to a Set, it will not be added.

• You can use a List if you need to allow duplicates.
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Q23. 23. Can we add duplicates to Array?
Ans. 
Yes, duplicates can be added to an array.
• Arrays in Java can contain duplicate elements.

• Duplicate elements can be added to an array using the add() method of ArrayList class.

• For example, int[] arr = {1, 2, 3, 3, 4}; or ArrayList list = new ArrayList<>(Arrays.asList(1, 2, 3, 3, 4));
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Q1. Tell about yourself
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There are 1st round is operational then they take a typing test if you have good typing speed so you can select for final round.

Q1. HR asking about the company & about to relevent questions to your job
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Q2. They give you 1 point for communication checking
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Q1. Last experience, rotation shift, extend shift hours.
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Q2. Salary expectations
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Excel test.and appt test

Basic Excel questions.
Basic Comprehension Test.

Q1. About self. Why did you leave your previous job?
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Q2. For what duration are you planning to work here?
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