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20+ Redox Scientific Interview Questions and Answers

Updated 21 Feb 2024
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Q1. Maximum Difference Problem Statement

Given an array ARR of N elements, your task is to find the maximum difference between any two elements in ARR.

If the maximum difference is even, print EVEN; if it is odd, p...read more

Ans.

Find the maximum difference between any two elements in an array and determine if it is even or odd.

  • Iterate through the array to find the maximum and minimum elements

  • Calculate the difference between the maximum and minimum elements

  • Check if the difference is even or odd and return the result

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Q2. Where do you rate your programming skills on a scale of 1 to 10?

Ans.

I rate my programming skills at 8 out of 10.

  • I have experience in multiple programming languages such as Java, Python, and C++.

  • I have completed several projects including a web application and a mobile app.

  • I am constantly learning and improving my skills through online courses and personal projects.

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Q3. How will you print the address of a variable without using a pointer?

Ans.

Printing the address of a variable without using a pointer can be done by using the & operator.

  • Use the & operator before the variable name to print its address

  • Example: int num = 10; printf("%p", &num);

  • This will print the address of the variable num

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Q4. List out the differences between Generalization and Specialization in DBMS

Ans.

Generalization and Specialization are two important concepts in DBMS.

  • Generalization is the process of combining two or more entities into a higher-level entity.

  • Specialization is the process of dividing a higher-level entity into two or more lower-level entities.

  • Generalization is a top-down approach while specialization is a bottom-up approach.

  • Generalization is used to represent a group of entities that share common attributes and relationships.

  • Specialization is used to repres...read more

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Q5. What exactly is index hunting, and how does it aid query performance?

Ans.

Index hunting is the process of finding the best index for a query to improve its performance.

  • Index hunting involves analyzing the query and the database schema to determine the most efficient index to use.

  • It can involve creating new indexes or modifying existing ones.

  • For example, if a query frequently searches for a specific column, creating an index on that column can significantly improve performance.

  • Index hunting is an important part of database optimization and can great...read more

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Q6. What is the fill factor in SQL? What is its default value?

Ans.

Fill factor is the percentage of space on each leaf-level page to be filled with data.

  • It determines how much data is written to a page during index creation or rebuild.

  • It can improve performance by reducing page splits and fragmentation.

  • The default value is 0, which means the page is filled to 100%.

  • A fill factor of 80 means the page is filled to 80% and 20% is left empty for future growth.

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Q7. What is the difference between classful and classless addressing?

Ans.

Classful addressing uses fixed network sizes, while classless addressing allows for variable network sizes.

  • Classful addressing divides IP addresses into five classes: A, B, C, D, and E.

  • Classful addressing assumes that all networks within a class have the same network size.

  • Classless addressing allows for more flexibility in network size and allows for the creation of subnets.

  • Classless addressing is used in modern networks, while classful addressing is obsolete.

  • Example of class...read more

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Q8. What is Denormalization and what is its application?

Ans.

Denormalization is the process of adding redundant data to improve query performance.

  • It involves duplicating data in multiple tables to avoid joins and improve query speed.

  • It can be useful in read-heavy applications where query performance is critical.

  • Examples include adding a total sales column to a customer table instead of calculating it through joins.

  • It can also involve flattening nested data structures to improve query performance.

  • However, it can lead to data inconsisten...read more

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Q9. How does Dynamic Loading help in better memory space utilization?

Ans.

Dynamic Loading allows loading of modules only when required, freeing up memory space.

  • Dynamic Loading loads modules only when required, freeing up memory space.

  • It allows for better memory utilization by loading only necessary modules.

  • For example, in a web application, images can be loaded dynamically as the user scrolls down the page.

  • This reduces the initial load time and improves the overall performance of the application.

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Q10. What do you know about beams?

Ans.

Beams are structural elements that support loads by resisting bending.

  • Beams are typically horizontal, but can also be vertical or diagonal.

  • They are commonly made of wood, steel, or concrete.

  • The shape and size of a beam depends on the load it needs to support and the span it needs to cover.

  • Examples of beams include floor joists, roof trusses, and bridge girders.

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Q11. What is IPv4 and IPv6?

Ans.

IPv4 and IPv6 are internet protocol versions used to identify devices on a network.

  • IPv4 uses 32-bit addresses and can support up to 4.3 billion unique addresses.

  • IPv6 uses 128-bit addresses and can support an almost infinite number of unique addresses.

  • IPv6 also includes features such as better security and improved routing.

  • Both protocols are currently in use, but IPv6 is becoming more widely adopted as IPv4 addresses become scarce.

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Q12. What is memory allocation?

Ans.

Memory allocation is the process of assigning memory space to programs or processes.

  • Memory allocation is essential for programs to run efficiently.

  • It involves reserving a block of memory for a program to use.

  • There are different methods of memory allocation such as stack allocation and heap allocation.

  • Examples of memory allocation functions in programming languages include malloc() in C and new operator in C++.

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Q13. What is segmentation?

Ans.

Segmentation is the process of dividing a larger market into smaller groups of consumers with similar needs or characteristics.

  • Segmentation helps companies to better understand their target audience and create more effective marketing strategies.

  • There are different types of segmentation such as demographic, geographic, psychographic, and behavioral.

  • For example, a company may use demographic segmentation to target a specific age group or income level, or geographic segmentatio...read more

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Q14. Define turbines and its type?

Ans.

Turbines are machines that convert fluid energy into mechanical energy. There are four types of turbines: steam, gas, hydro, and wind.

  • Turbines are used in power generation, aviation, and marine propulsion.

  • Steam turbines are commonly used in power plants.

  • Gas turbines are used in aviation and power generation.

  • Hydro turbines are used in hydroelectric power plants.

  • Wind turbines are used in wind farms to generate electricity.

  • Turbines work by rotating blades that are attached to a ...read more

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Q15. 1)what is inheritance 2) conditional statements 3)array and its types

Ans.

Inheritance, conditional statements, and arrays are fundamental concepts in programming.

  • Inheritance allows a class to inherit properties and methods from another class.

  • Conditional statements allow for decision-making in code based on certain conditions.

  • Arrays are data structures that store a collection of elements of the same type.

  • Types of arrays include one-dimensional, two-dimensional, and jagged arrays.

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Q16. What is paging ?

Ans.

Paging is a memory management technique used by operating systems to manage memory usage.

  • It involves dividing memory into fixed-size pages.

  • Pages are loaded into physical memory as needed.

  • Allows for more efficient use of memory and prevents fragmentation.

  • Examples include demand paging and page replacement algorithms.

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Q17. What is thrashing?

Ans.

Thrashing is a phenomenon in computer systems where excessive paging or swapping occurs, resulting in decreased performance.

  • Occurs when the system spends more time swapping pages than executing instructions

  • Caused by insufficient memory or poorly optimized programs

  • Can be identified by high disk activity and low CPU utilization

  • Example: A computer running multiple memory-intensive applications simultaneously

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Q18. What type of harddrive in computer

Ans.

There are different types of hard drives in computers, such as HDD (Hard Disk Drive) and SSD (Solid State Drive).

  • HDD (Hard Disk Drive) uses spinning disks to store data

  • SSD (Solid State Drive) uses flash memory for faster performance

  • Hybrid drives combine HDD and SSD technologies for a balance of storage capacity and speed

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Q19. Define data types

Ans.

Data types are classifications of data items based on their characteristics and properties.

  • Data types determine the type of data that can be stored in a variable or used in an expression.

  • Common data types include integers, floating-point numbers, characters, strings, and booleans.

  • Data types can be categorized as primitive or non-primitive, depending on whether they are built-in or user-defined.

  • Primitive data types include int, float, char, bool, while non-primitive data types...read more

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Q20. Define Thrust

Ans.

Thrust is the force that propels an object forward.

  • Thrust is a force that acts in the opposite direction to drag.

  • It is commonly used in the context of propulsion systems, such as rockets and jet engines.

  • Thrust can be measured in units of force, such as pounds or newtons.

  • Examples of thrust include the force generated by a car's engine, the thrust of a rocket during liftoff, and the thrust of a swimmer's arms and legs through the water.

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Q21. Define OOPs concept.

Ans.

OOPs is a programming paradigm that focuses on objects and their interactions to solve problems.

  • OOPs stands for Object-Oriented Programming.

  • It emphasizes on encapsulation, inheritance, and polymorphism.

  • Encapsulation is the process of hiding implementation details from the user.

  • Inheritance allows a class to inherit properties and methods from another class.

  • Polymorphism allows objects to take on multiple forms or behaviors.

  • Examples of OOPs languages include Java, C++, and Pytho...read more

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Q22. Print any 2d pattern?

Ans.

There are countless 2D patterns, ranging from simple geometric shapes to intricate designs.

  • Some common 2D patterns include stripes, polka dots, chevron, herringbone, and plaid.

  • Geometric patterns can include triangles, squares, circles, and hexagons.

  • Floral patterns often feature flowers and leaves arranged in a repeating pattern.

  • Tartan patterns are a type of plaid that originated in Scotland and are associated with different clans.

  • Mosaic patterns are made up of small tiles or ...read more

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Q23. Explain about hardware

Ans.

Hardware refers to the physical components of a computer system that can be seen and touched.

  • Hardware includes components such as the CPU, memory, motherboard, graphics card, and storage devices.

  • Examples of hardware are keyboards, monitors, printers, and scanners.

  • Hardware can be classified as input devices, output devices, storage devices, and processing devices.

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Q24. Explain about test

Ans.

Tests are assessments or evaluations conducted to measure a person's knowledge, skills, or abilities.

  • Tests can be used in various fields such as education, employment, and healthcare.

  • Types of tests include multiple choice, essay, practical, and performance assessments.

  • Tests can be standardized (e.g. SAT, GRE) or customized for specific purposes (e.g. job interviews).

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Q25. Wats your opinion

Ans.

I'm sorry, but you haven't provided a clear question for me to answer.

  • Please provide a specific question for me to answer.

  • Without a clear question, I cannot provide an opinion or response.

  • Please rephrase or clarify your question.

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More about working at Cognizant

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Top Rated IT/ITES Company - 2024
HQ - Teaneck. New Jersey., United States (USA)
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Interview Process at Redox Scientific

based on 17 interviews
3 Interview rounds
Aptitude Test Round
Technical Round
HR Round
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