Bentley Systems Softwaretest Engineer Interview Questions and Answers

Q1. Write a program to reverse the string
Ans. 
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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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
Ans. 
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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Q1. What is Regression Testing?
Ans. 
Regression testing is the process of retesting a software application to ensure that new code changes have not adversely affected existing functionality.
• Performed after code changes to ensure that existing features still work correctly

• Helps in identifying and fixing any defects introduced by new code changes

• Automated tools like Selenium can be used for regression testing

• Examples: Testing a login feature after adding a
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Q1. About oops, constructor,
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Q2. Spring boot, hibernate questions
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Q1. Sql. Questions group by having and joins
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Q2. Datawarehousing and etl concepts
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Q1. Asked few Python and AWS related questions.
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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,
Ans. 
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
Ans. 
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
Ans. 
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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