Volante Technologies Test Engineer Interview Questions and Answers

Soo easy aptitude exam asked questions

Q1. What is oops in Java,fibo, and sorting
Ans. 
OOPs in Java refers to Object-Oriented Programming concepts, fibo likely refers to Fibonacci sequence, and sorting refers to arranging elements in a specific order.
• OOPs in Java includes concepts like classes, objects, inheritance, polymorphism, and encapsulation.

• Fibo likely refers to the Fibonacci sequence, where each number is the sum of the two preceding ones (e.g. 0, 1, 1, 2, 3, 5, ...).

• Sorting involves arranging el...read more
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Q2. Why is garbage collector is used in java etc more of java questions
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Q3. Can main can be overloaded and overrided
Ans. 
Yes, main can be overloaded but not overridden in C++.
• Main can be overloaded by defining multiple functions with different parameters.

• Example: int main() and int main(int argc, char* argv[])

• Main cannot be overridden as it is a static function of the program.
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Q1. Question was related to Java like difference between abstract class and interface,how linked list ,hash map ,arraylist work internally
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Q2. Question related to spring boot like @autowired annotations, how spring boot is different from spring
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Q3. Coding questions: reverseString ,factorial using Recursion only,how to find middle element in LL
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Q1. Some basic questions related to JS and Java both
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Q2. Managerial related questions,
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Q1. Promises ,async and await related questions
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Q2. Question related to API ,and scenario based questions
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First round was aptitude and 2 coding questions

Q1. Second round was face to face was fully technical asked me code some basic code
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Q2. Find 2nd largest decimal number from given numbers
Ans. 
Iterate through the numbers and keep track of the largest and second largest numbers.
• Iterate through the numbers and compare each number with the current largest and second largest numbers.

• Update the second largest number if a new number is found that is greater than the current second largest number.

• Return the second largest number at the end of the iteration.
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Q1. Next was manager round it was also little technical
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Q1. This round was with vice president
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Q1. This round was final round about salary negotiation and hr round
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Coding simple problem

Q1. Prepare for normal system design questions and you are good to go
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Q1. Maximum Area in Histogram
Ans. 
Find the largest rectangular area in a histogram represented by an array of heights.
• Use a stack to keep track of the indices of the histogram bars.

• Iterate through each bar, pushing indices onto the stack until a shorter bar is found.

• When a shorter bar is found, pop from the stack and calculate the area with the popped height as the smallest height.

• The width is determined by the distance between the current index and th...read more
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Q2. Longest Common Subsequence
Ans. 
Longest Common Subsequence (LCS) finds the longest sequence present in both strings without rearranging characters.
• LCS is a classic dynamic programming problem.

• Example: For strings 'ABCBDAB' and 'BDCAB', LCS is 'BCAB' or 'BDAB'.

• The time complexity is O(m * n), where m and n are lengths of the two strings.

• A 2D array is typically used to store lengths of LCS for substrings.
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There were 2 easy question 1 medium
Question were good but have weak test case.

This was project or lld round.
You just be aware of class and other stuff.

Q1. Discussion on project Asked graph coding question in real scenerio. Like asked what algorithm you will use for different real life problems
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Q1. Why engineering and what u know about cred
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Build a typeahead component

Q1. Build a form for personal details
Ans. 
Build a form for personal details
• Include fields for name, email, phone number, address, date of birth

• Use input fields, dropdowns, and date pickers for user input

• Add validation for required fields and correct formats

• Consider user experience with clear labels and easy navigation
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Q2. Add validations to different fields
Ans. 
Implement validations for different fields in software development.
• Identify the fields that require validation such as email, password, phone number, etc.

• Use regular expressions to validate input data format.

• Implement client-side and server-side validations to ensure data integrity.

• Display error messages for invalid input to guide users on correct data entry.
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Q1. Insights about company and candidate
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Q2. If I know Data structures or not?
Ans. 
Yes, I have knowledge of data structures.
• I have experience with common data structures like arrays, linked lists, stacks, queues, trees, and graphs.

• I understand the time and space complexity of different data structures and their operations.

• I have implemented data structures in various programming languages like C++, Java, and Python.

• For example, I have used a hash table to efficiently store and retrieve data in consta
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