Quest Global Technical Lead Interview Questions, Process, and Tips for Experienced

Q1. Sql queries join and left join
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Q1. Introduce yourself
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Question on C and C++

Q1. Past experience
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Q1. Discussion with manager
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Q1. Explain node vs java
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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 applicatio...read more
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Q2. Explain 1nf 2nf 3nf
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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.
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Q3. Explain asynchronus
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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 setTimeout
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Q4. Explain graphql
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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.
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Q5. Explain ?? in javascript
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?? 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.
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Q1. What is your approach to application security in product engineering?
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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 practi...read more
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Q2. How would you explain the importance of addressing vulnerabilities to a developer who is reluctant to implement patches?
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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 reputat...read more
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