Infosys Interview Questions, Process, and Tips

Pickling is a process of serializing and de-serializing Python objects into a byte stream.

• Pickling is used to store Python objects in a file or transfer them over a network.

• The pickle module in Python is used for pickling and unpickling.

• The pickled data can be stored in a file or transferred over a network.

• The pickled data can be easily unpickled to get back the original Python object.

Sort an array of strings

• Use built-in sorting functions like sort() in JavaScript

• Implement custom sorting algorithms like bubble sort or quicksort

• Consider the case sensitivity of the strings while sorting

Find the second largest number in a set of three numbers.

• Compare all three numbers and find the largest one.

• Then compare the remaining two numbers and find the largest one.

• The largest of the remaining two numbers is the second largest number.

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 function overloading and templates.

• C++ has a standard library while C does not.

• C++ is more complex than C.

• C++ is backward compatible with C.

• C++ allows for both procedural and object-oriented programming.

• C++ has a more strict type checking system than C.

OOPs is a programming paradigm that uses objects to represent real-world entities and their interactions.

• OOPs stands for Object-Oriented Programming.

• It focuses on encapsulation, inheritance, and polymorphism.

• Encapsulation is the process of hiding implementation details from the user.

• Inheritance allows a class to inherit properties and methods from another class.

• Polymorphism allows objects to take on multiple forms or b...read more

SDLC stands for Software Development Life Cycle, which is a process used to design, develop, and test software.

• The steps in SDLC are planning, analysis, design, development, testing, deployment, and maintenance.

• During planning, the project scope and requirements are defined.

• Analysis involves gathering and analyzing user requirements.

• Design involves creating a detailed plan for the software.

• Development involves coding a...read more

A foreign key is a column or a set of columns in a table that refers to the primary key of another table.

• It establishes a relationship between two tables.

• It ensures referential integrity.

• It helps in maintaining data consistency.

• It can be null or have duplicate values.

• Example: A 'customer_id' column in an 'orders' table that refers to the 'id' column in a 'customers' table.