Zidio Development Associate Software Engineer Interview Questions and Answers

Q1. Question related to React JS (which I've applied for) like Hooks Concept, Routes .
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Q2. Basic JavaScript coding questions
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Q1. React Hooks concept-based coding question. Show Increment, decrement button with functionality using Hooks Concept
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Q2. Write a code for toggle switching with CSS.
Ans. 
Toggle switching with CSS code example
• Use a checkbox input and label elements

• Apply CSS styles to hide the checkbox and style the label as a button

• Use the :checked pseudo-class to toggle styles based on checkbox state
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Q1. What is your experience
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Q2. Reverse given string
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Reverse a given string
• Use a loop to iterate through the characters of the string and build a new string in reverse order

• Alternatively, you can use built-in functions like reverse() or StringBuilder in some programming languages
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Q3. How to find if string is palindrome
Ans. 
Check if a string reads the same forwards and backwards
• Iterate through the string from both ends and compare characters

• Use built-in functions like reverse() or slice() to check for palindrome

• Ignore spaces and punctuation when checking for palindrome
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Q1. What is constructor overloading?
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Constructor overloading is when a class has multiple constructors with different parameters.
• Allows a class to have multiple constructors with different parameter lists

• Helps in creating objects in different ways based on the parameters passed

• Example: class Car { Car() {...} Car(String model) {...} }
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Q1. What is your current salary, and what are your salary expectations?
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I am currently earning $80,000 annually. My salary expectations are in the range of $90,000 to $100,000.
• Current salary is $80,000 annually

• Salary expectations are between $90,000 to $100,000

• Open to negotiation based on benefits and opportunities
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Q1. Java 8 new features
Ans. 
Java 8 introduced several new features including lambda expressions, functional interfaces, streams, and default methods.
• Lambda expressions allow you to pass functionality as an argument to a method.

• Functional interfaces have a single abstract method and can be used with lambda expressions.

• Streams provide a way to work with sequences of elements and perform aggregate operations.

• Default methods allow interfaces to have ...read more
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70 questions in 90 minutes with 7 sections

Q1. Introduce yourself
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Q2. Project description
Ans. 
Developed a web application for tracking project progress and managing tasks
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end

• Utilized MongoDB for database storage

• Incorporated authentication and authorization features for user security
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Q3. Second highest salary
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To find the second highest salary in a table, you can use a SQL query with the MAX() function and a subquery.
• Use a SQL query to select the MAX() salary from the table.

• Use a subquery to select the MAX() salary that is less than the overall MAX() salary.

• Combine both queries to get the second highest salary.
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Q4. What is indexing
Ans. 
Indexing is a technique used to optimize the performance of databases by creating a data structure that allows for quick retrieval of data.
• Indexing involves creating a data structure that maps the values of specific columns in a database table to their physical location on disk.

• It helps in speeding up data retrieval operations by allowing the database to quickly locate the rows that match a certain condition.

• Examples o...read more
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Q1. Introduce yourself
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I am a passionate software developer with experience in Java, Python, and web development.
• Experienced in Java, Python, and web development technologies

• Strong problem-solving skills

• Team player with excellent communication skills
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Q2. Project description
Ans. 
Developed a web application for tracking project progress and managing tasks
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end

• Utilized MongoDB for database storage

• Incorporated authentication and authorization features for user security
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Q3. Difference between truncate and delete
Ans. 
Truncate is a DDL command that removes all records from a table, while delete is a DML command that removes specific records.
• Truncate is faster than delete as it does not log individual row deletions.

• Truncate resets the identity seed of the table, while delete does not.

• Truncate cannot be rolled back, while delete can be rolled back using a transaction.

• Truncate does not fire triggers, while delete does.
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Q1. Why you join company
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Q2. Where you see yourself after 5 years
Ans. 
In 5 years, I see myself as a senior software developer leading a team and working on cutting-edge technologies.
• Leading a team of developers on innovative projects

• Continuing to enhance my technical skills and knowledge

• Contributing to the growth and success of the company

• Possibly pursuing further education or certifications in software development
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Coding test in any language

Any topics for the GD

Q1. Experience about the java script
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Q2. My work experience about the java scirpt
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Q3. Palindrome in any code language
Ans. 
A palindrome is a word, phrase, number, or other sequence of characters that reads the same forward and backward.
• Check if the input string is equal to its reverse

• Ignore spaces and punctuation when checking for palindromes

• Convert the input string to lowercase for case-insensitive comparison
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Q4. Other general maths programming questions
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Q1. Peak element in array
Ans. 
A peak element in an array is an element that is greater than or equal to its neighbors.
• Iterate through the array and check if the current element is greater than its neighbors.

• If the element at index i is greater than or equal to elements at indices i-1 and i+1, it is a peak element.

• Example: ['1', '3', '2', '4', '1'] has peak elements at index 1 and 3.
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Q2. 2 dimentional array rotate 90 degree
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Rotate a 2D array by 90 degrees clockwise
• Transpose the array

• Reverse each row of the transposed array
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Pollitices current generation