Vendekin Technologies Interview Questions, Process, and Tips

Aptitude and c++ combine test

Q1. 1.swap two number without using third variable
Ans. 
Swap two numbers without using a third variable in Java
• Use XOR operation to swap two numbers without using a third variable

• Example: int a = 5, b = 10; a = a ^ b; b = a ^ b; a = a ^ b; // Now a = 10, b = 5
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Q2. Remove duplicate in array
Ans. 
Use a Set to remove duplicates from an array of strings.
• Create a Set to store unique elements.

• Iterate through the array and add each element to the Set.

• Convert the Set back to an array to get the array without duplicates.
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Q1. Some questions based on accesibility of variables,methds,guess the output
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Q2. Hooks lifecycle
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Q3. Sql queries of select
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Q4. Join queries of mysql databases
Ans. 
Join queries in MySQL databases allow you to combine data from multiple tables based on a related column.
• Use JOIN keyword to combine data from two or more tables based on a related column

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Specify the columns to be retrieved using SELECT statement
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Q5. Find missing ele in array
Ans. 
Find missing element in array of strings
• Iterate through the array and check for missing elements

• Use a hash map to keep track of elements present in the array

• Compare the elements in the array with a reference array to find the missing element
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Q1. Fibonacci series on java
Ans. 
Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.
• Start with two initial numbers, usually 0 and 1

• Add the previous two numbers to get the next number in the sequence

• Repeat this process to generate the Fibonacci series
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Q2. Javascript map and forEach difference
Ans. 
map creates a new array with the results of calling a provided function on every element, forEach executes a provided function once for each array element.
• map returns a new array with the results of the provided function, forEach does not return anything

• map does not modify the original array, forEach can modify the original array

• Example: const numbers = [1, 2, 3]; numbers.map(num => num * 2); // returns [2, 4, 6]; numb...read more
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Q3. Your favourite Css properties need to explain and give demo of it
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Q1. Tell me about your self
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Q2. Javasctipt que basic and advance
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