DEVtrust Software Engineer Trainee Interview Questions and Answers

I am a recent graduate with a degree in Computer Science, passionate about coding and problem-solving.

• Graduated with a degree in Computer Science

• Passionate about coding and problem-solving

• Completed internships at tech companies

The time it takes to learn a new technology varies depending on complexity and prior knowledge.

• Learning time depends on complexity of technology.

• Prior knowledge and experience can impact learning speed.

• Dedication and practice are key to mastering new technologies.

• Setting realistic goals and milestones can help track progress.

• Examples: Learning a new programming language may take a few weeks, while mastering a complex f...read more

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 ...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

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

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.

A closure is a function that has access to its own scope, as well as the outer scope in which it was defined.

• A closure allows a function to access variables from an outer function even after the outer function has finished executing.

• Closures are commonly used in JavaScript for data encapsulation and creating private variables.

• Example: function outerFunction() { let outerVar = 'I am outer'; return function innerFunction...read more

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.

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