Capgemini Software Developer Interview Questions and Answers

Prime numbers are natural numbers greater than 1 that have no divisors other than 1 and themselves.

• A prime number is only divisible by 1 and itself. Example: 2, 3, 5.

• The first prime number is 2, which is also the only even prime number.

• All other even numbers greater than 2 are not prime because they can be divided by 2.

• The prime numbers between 1 and 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47,...read more

Method overriding allows a subclass to provide a specific implementation of a method already defined in its superclass, while overloading allows multiple methods with the same name but different parameters.

• Method Overriding: Redefining a method in a subclass. Example: class Animal { void sound() { } } class Dog extends Animal { void sound() { } }

• Method Overloading: Same method name with different parameters in the...read more

Polymorphism in C++ allows methods to do different things based on the object that it is acting upon, enhancing flexibility and reusability.

• Polymorphism is a core concept in OOP, enabling methods to be overridden in derived classes.

• There are two types: compile-time (static) and run-time (dynamic) polymorphism.

• Compile-time polymorphism is achieved through function overloading and operator overloading.

• Run-time polym...read more

Operation overloading allows custom behavior for operators in user-defined classes, enhancing code readability and usability.

• Overloading the '+' operator to add two complex numbers: class Complex { int real, imag; Complex operator+(const Complex &c) { return Complex(real + c.real, imag + c.imag); } };

• Overloading the '<<' operator for outputting a custom class: class Point { int x, y; ...read more

Find the length of the longest subarray with a sum of zero using efficient algorithms like hashing or prefix sums.

• Use a HashMap: Store the cumulative sum and its index. If the same sum appears again, the subarray between the indices has a sum of zero.

• Example: For array [1, -1, 2, -2, 3], the longest subarray with sum zero is [1, -1], length = 2.

• Prefix Sum: Calculate the cumulative sum as you iterate through the ar...read more

I am excited to join this company for its innovative projects, collaborative culture, and opportunities for professional growth.

• The company's commitment to cutting-edge technology aligns with my passion for innovation, as seen in projects like [specific project].

• I admire the collaborative culture here, which fosters teamwork and creativity, similar to my experience in [previous team project].

• The opportunities for ...read more

Encapsulation is a fundamental OOP principle that restricts access to certain components of an object.

• Encapsulation combines data and methods that operate on that data within a single unit, or class.

• It restricts direct access to some of an object's components, which is a means of preventing unintended interference and misuse.

• For example, in a class 'Car', the properties like 'speed' can be private, while methods l...read more

Custom metadata is for configuration data, while custom settings are for application-specific data storage in Salesforce.

• Custom Metadata Types are used for application configuration and can be deployed between environments.

• Custom Settings are used for storing application-specific data that can be accessed without SOQL queries.

• Custom Metadata can be packaged and deployed, while Custom Settings cannot be packaged.

• Ex...read more