Test Yantra Software Solutions Associate Software Engineer Interview Questions, Process, and Tips

Q1. String s="Expense is 1000 rs"..Extract 1000 from the above string and add 100 to it, print it like Expense is 1100
Ans. 
Extract and manipulate numerical value from a string.
• Use regular expressions to extract the numerical value from the string.

• Convert the extracted value to an integer, add 100 to it, and then format it back into the original string format.

• Print the updated string with the new numerical value.
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Q2. What is statis aspect of non static method
Ans. 
The static aspect of a non-static method refers to the fact that it belongs to the class and can be accessed without creating an instance of the class.
• Non-static methods are associated with an instance of a class and can access instance variables.

• Static methods, on the other hand, belong to the class itself and can be accessed without creating an instance.

• Non-static methods can access static variables and methods, but ...read more
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Few programs
On arrays snd strings

Q1. What is hoisting?
Ans. 
Hoisting is a JavaScript mechanism where variable and function declarations are moved to the top of their containing scope during compilation.
• Variable and function declarations are hoisted to the top of their scope.

• Only declarations are hoisted, not initializations.

• Function declarations take precedence over variable declarations.

• Hoisting can lead to unexpected behavior if not understood properly.
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Q2. What are es6 features?
Ans. 
ES6 features are new additions to JavaScript introduced in ECMAScript 2015.
• Arrow functions

• Let and const declarations

• Template literals

• Destructuring assignments

• Classes

• Promises

• Modules
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Q3. What is difference between let, const and vat?
Ans. 
let is block scoped, const is immutable, var is function scoped
• let: block scoped, can be reassigned

• const: block scoped, cannot be reassigned, but properties of objects can be changed

• var: function scoped, can be reassigned
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Q4. Write a program to sort an array.
Ans. 
Program to sort an array of strings
• Use a sorting algorithm like bubble sort, selection sort, or merge sort

• Iterate through the array and compare adjacent elements to sort them

• Ensure the sorting algorithm is efficient and handles edge cases
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Q5. Difference between map and for each?
Ans. 
Map applies a function to each element of an array and returns a new array, while forEach iterates over each element without returning a new array.
• Map returns a new array with the results of applying a function to each element of the original array.

• forEach simply iterates over each element of the array without returning a new array.

• Example: Using map to double each element in an array - [1, 2, 3].map(num => num * 2) wo...read more
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Q6. Write an arrow function.
Ans. 
An arrow function is a concise way to write functions in JavaScript.
• Arrow functions are written using the '=>' syntax.

• They do not have their own 'this' keyword.

• They are often used for short, one-line functions.

• Example: const add = (a, b) => a + b;
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Q1. Technical question
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Q1. Coding questions
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Q1. How to acheve encapsulation
Ans. 
Encapsulation is achieved by restricting access to certain components of an object and only allowing access through designated methods.
• Use access modifiers like private, protected, and public to control access to class members

• Create getter and setter methods to access and modify private variables

• Encapsulate related data and methods within a class to ensure data integrity
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Q2. Difference between overloading and overriding
Ans. 
Overloading is having multiple methods in the same class with the same name but different parameters. Overriding is having a method in a subclass with the same name and parameters as a method in the superclass.
• Overloading is resolved at compile time based on the method signature, while overriding is resolved at runtime based on the object type.

• Overloading is used to provide different implementations of a method based o...read more
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Q3. Upcasting and down castings
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Q1. Can you re locate to Bangalore
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