TCS Performance Test Engineer 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.

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.

• Common operations include push (add element) and pop (remove element).

• Stacks are used in programming for function calls, expression evaluation, and more.

DOM stands for Document Object Model. It is a programming interface for web documents.

• DOM is a tree-like structure that represents the HTML or XML document.

• It allows developers to manipulate the content and structure of a web page using scripting languages like JavaScript.

• DOM provides a way to access and modify the elements, attributes, and text content of a web page.

• It also allows developers to add or remove elements ...read more

An interface is a contract between two components that defines the communication between them.

• An interface defines a set of methods that a class must implement.

• Interfaces allow for polymorphism and loose coupling.

• Interfaces can be used to define common behavior for unrelated classes.

• Examples include the Java Collection interface and the USB interface.

Insertion sort is a simple sorting algorithm that iterates through an array and places each element in its correct position. Merge sort is a divide and conquer algorithm that divides an array into two halves, sorts them separately, and then merges them back together.

• Insertion sort has a time complexity of O(n^2) while merge sort has a time complexity of O(n log n)

• Insertion sort is efficient for small data sets while me...read more