TestingXperts Java Developer Interview Questions and Answers

Good and easy learn dsa and algo

Learn dsa and algo binary tree and lists

Q1. Learn basic subjects and topics like OS and Cloud
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Q1. Short round based on aptitude and attidtude
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Aptitude,reasoning,verbal,C language,Java,C++

Q1. What is interface in JAVA
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Q2. Explain OOPS in JAVA
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3 Questions of mid difficulty

2 questions of mid to hard difficulty

Q1. Basic DSA and problem solving related questions
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Q2. How to design and implement a dictionary application
Ans. 
Design and implement a dictionary application for easy word lookup
• Define data structure to store words and their meanings

• Implement search functionality to look up words quickly

• Include features like word suggestions, synonyms, and antonyms

• Allow users to add new words and meanings to the dictionary

• Consider implementing a user-friendly interface for easy navigation
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Given a string ‘abbaca’ as input, output print -‘ca’ duplicates adjacent remove
Sql- write a query to delete email from user table with id, name

Technology advantage or not

All aptitude topics,logical reasoning

Q1. Oops,2 coding questions
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Q2. Palindrome,even number
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Q1. What do you know
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Q2. Do you have any questions
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Different logical reasoning question over the round

Different dsa question over topics array ,string etc

Q1. Tell me about yourself
Ans. 
I am a dedicated and hardworking individual with a passion for learning and growth.
• I have a Bachelor's degree in Business Administration

• I have 3 years of experience in marketing and sales

• I am proficient in Microsoft Office Suite and social media marketing

• I am a team player and enjoy collaborating with others to achieve goals
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Q2. Tell me your strength
Ans. 
My strength lies in my ability to effectively communicate and collaborate with team members to achieve common goals.
• Strong communication skills - able to clearly convey ideas and information

• Collaborative nature - work well with others to problem solve and innovate

• Adaptability - able to adjust to changing circumstances and priorities

• Leadership skills - able to motivate and inspire team members towards success
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Q1. Tell me about yourself
Ans. 
I am a dedicated and hardworking individual with a passion for learning and growth.
• I have a strong work ethic and always strive to exceed expectations

• I am a quick learner and adapt well to new environments

• I have experience in project management and team collaboration
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Q2. Tell me your strength
Ans. 
My strength lies in my ability to effectively communicate and collaborate with team members to achieve common goals.
• Strong communication skills

• Collaborative mindset

• Ability to work well in a team

• Problem-solving skills

• Leadership qualities
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Round duration - 30 minutes
Round difficulty - Medium

It was in the morning around 9:00Am-9:30AM. Platform used for this round was hacerrank. Questions were of moderate to difficult level.

Q1. 
Count Subarrays with Given XOR Problem Statement
You are given an array of integers ARR and an integer X. Your task is to determine the number of subarrays of ARR whose bitwise XOR is equal to X.
Example...read more
Ans. 
Count the number of subarrays in an array whose XOR is equal to a given value.
• Iterate through the array and keep track of XOR values and their frequencies using a hashmap.

• For each element in the array, calculate the XOR value with all previous elements and check if it equals the given XOR value.

• Use the concept of XOR to efficiently solve the problem.

• Handle edge cases like XOR value being 0 separately.

• Time complexity ca...read more
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Q2. 
Distinct Characters Problem Statement
Given a string STR, return all possible non-empty subsequences with distinct characters. The order of the strings returned is not important.
Example:
Input:
STR = ...read more
Ans. 
Return all possible non-empty subsequences with distinct characters from a given string.
• Iterate through all possible subsequences of the input string

• Check for distinct characters in each subsequence

• Return the distinct character subsequences as an array of strings
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Round duration - 15 minutes
Round difficulty - Easy

It was in the night around 8:00PM-8:20PM. Interviewer was very calm in questioning. Platform used for this round was Skype and the questions focused more on personality rather than total.