Quest Global Technical Lead Interview Questions and Answers

Addressing vulnerabilities is crucial for software security, protecting users and maintaining trust in the application.

• Vulnerabilities can lead to data breaches; for example, the Equifax breach exposed sensitive data of 147 million people.

• Ignoring patches can result in exploitations; the WannaCry ransomware attack exploited unpatched Windows systems globally.

• Addressing vulnerabilities enhances the application's re...read more

My approach to application security integrates best practices throughout the product lifecycle, ensuring robust protection against threats.

• Implement security by design: Incorporate security measures from the initial design phase, such as threat modeling.

• Conduct regular security assessments: Use tools like static and dynamic analysis to identify vulnerabilities early in the development process.

• Adopt secure coding p...read more

Node.js is a runtime environment for executing JavaScript code outside of a browser, while Java is a general-purpose programming language often used for building enterprise applications.

• Node.js is based on JavaScript and is single-threaded, event-driven, and non-blocking.

• Java is a statically typed language with a strong emphasis on object-oriented programming.

• Node.js is commonly used for building server-side appli...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 requests.

• Clients can specify the structure of the response they want.

• It is strongly typed and introspective.

?? is a logical operator in JavaScript that returns true if either of the operands is true.

• ?? is also known as the 'logical OR' operator.

• It is represented by two question marks (??).

• Example: let result = a ?? b; // result will be the value of a if a is not null or undefined, otherwise it will be the value of b.

Asynchronous refers to a programming model where tasks can be executed independently without waiting for each other to complete.

• Asynchronous programming allows tasks to run concurrently, improving performance and responsiveness.

• It is commonly used in web development for handling tasks like fetching data from servers without blocking the user interface.

• Examples include JavaScript's asynchronous functions like setTi...read more

1NF, 2NF, and 3NF are different normal forms in database normalization.

• 1NF (First Normal Form) - Each column in a table must contain atomic values. No repeating groups of columns.

• 2NF (Second Normal Form) - Meets 1NF and all non-key attributes are fully functional dependent on the primary key.

• 3NF (Third Normal Form) - Meets 2NF and all non-key attributes are non-transitively dependent on the primary key.