Exhibitions India Group Interview Questions and Answers

Develop a 'To Do List' application with modern design and functionality like 'Add', 'Edit', 'Delete', and 'View List' within ½ hour.

• Use HTML, CSS, and JavaScript for front-end development

• Implement CRUD operations for tasks (Create, Read, Update, Delete)

• Design a user-friendly interface with header and footer

• Utilize localStorage or backend server for data storage

Finding the maximum length of palindromic substring from an array of strings using Typescript.

• Iterate through each string in the array

• For each string, iterate through all possible substrings and check if it is a palindrome

• Keep track of the maximum length palindrome found

Distinct keyword in SQL is used to retrieve unique values from a column in a table.

• Distinct keyword eliminates duplicate rows from the result set

• It is often used in conjunction with SELECT statement

• Example: SELECT DISTINCT column_name FROM table_name

Integrity constraints are rules that ensure data integrity and consistency in a database.

• Integrity constraints are used to enforce business rules or data quality rules in a database.

• They can include rules such as unique constraints, foreign key constraints, and check constraints.

• Unique constraints ensure that no two rows have the same value in a specified column.

• Foreign key constraints enforce referential integrity by ensuring that values in one table match values in another ...read more

Code to merge two sorted arrays

• Create a new array to store the merged result

• Use two pointers to iterate through both arrays and compare elements

• Add the smaller element to the new array and move the pointer for that array

High order functions are functions that can take other functions as arguments or return functions as results.

• High order functions can accept functions as parameters.

• High order functions can return functions as output.

• Examples include map, filter, and reduce functions in JavaScript.

GraphQL is a query language for APIs and a runtime for executing those queries.

• GraphQL allows clients to request only the data they need.

• It provides a single endpoint for all data fetching.

• GraphQL schemas define the types of data that can be queried.

Async wait function code example

• Use async/await keywords in the function declaration

• Use setTimeout to simulate asynchronous operation

• Return a Promise that resolves after a specified time