Chetu Softwaretest Engineer Interview Questions and Answers

Q1. About oops, constructor,
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Q2. Spring boot, hibernate questions
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Q1. Focus on coding, Question: find the duplicate string from list of string and the count of it(how many times it is repeated) Prepare oops and collections concepts.
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Q2. Focus on method overriding
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Q3. Difference between arraylist and LinkedInlist
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ArrayList is a resizable array implementation while LinkedList is a doubly linked list implementation.
• ArrayList uses dynamic arrays to store elements, allowing fast random access but slower insertion and deletion.

• LinkedList uses nodes with pointers to the next and previous elements, allowing fast insertion and deletion but slower random access.

• Example: ArrayList - List names = new ArrayList<>(); LinkedList - List citie
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Q4. Use of static keyword
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The static keyword in programming is used to declare variables, methods, or classes that belong to the class itself rather than instances of the class.
• Static variables are shared among all instances of a class.

• Static methods can be called without creating an instance of the class.

• Static classes cannot be instantiated and are used for grouping related methods and variables.

• Example: public static int count = 0; // static
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They have asked bunch of question from java, which i have told o am not aware about

Q1. What is Binary trees,
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Binary trees are hierarchical data structures composed of nodes, where each node has at most two children.
• Consists of nodes with at most two children - left and right

• Each node can have zero, one, or two children

• Used in data structures like binary search trees and binary heaps
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Q2. What are expection handling in pyhton
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Exception handling in Python is a way to handle errors that occur during the execution of a program.
• Use try-except blocks to catch and handle exceptions

• Different types of exceptions can be handled separately

• Use finally block to execute code regardless of whether an exception occurred or not
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Q3. Write a SQL quesries
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SQL query to retrieve employee names and their salaries from a table
• Use SELECT statement to retrieve data

• Specify the columns you want to retrieve (employee names and salaries)

• Specify the table name from which you want to retrieve data
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Q1. Java program for prime no
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Java program to check if a number is prime or not
• Create a function to check if a number is prime or not

• Iterate from 2 to n/2 and check if n is divisible by any number

• If n is divisible by any number, it is not prime

• If n is not divisible by any number, it is prime
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Q2. Dynamic web table element program
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A dynamic web table element program involves identifying and interacting with elements in a table that change dynamically.
• Identify the table element using unique identifiers like class or id

• Use Selenium WebDriver to locate and interact with the table element

• Handle dynamic changes in the table by using dynamic XPath or CSS selectors

• Iterate through rows and columns to extract data or perform actions
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Q1. Write a program to reverse the string
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Program to reverse a string using array of characters
• Create an array of characters from the input string

• Iterate through the array in reverse order and append each character to a new string

• Return the reversed string
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30-40 mins mathematics questions is there and not that much of hard test is easy

Logically and mathematical

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Q1. What is array and tell array methods
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An array is a data structure that stores a collection of elements of the same type in a contiguous memory location.
• Array methods include push() - adds an element to the end of the array

• Array methods also include pop() - removes the last element from the array

• Other array methods are shift() - removes the first element, and unshift() - adds an element to the beginning

• Array methods like splice() - adds or removes elements...read more
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Q2. What is object and tell how its work in js
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An object in JavaScript is a collection of key-value pairs that represent a real-world entity or concept.
• Objects are used to store data and functions together.

• Properties in an object are accessed using dot notation or bracket notation.

• Objects can be created using object literals or constructor functions.
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