700+ Trainee Interview Questions and Answers

The first question is about keeping track of top 10 trending words in a dynamically changing file. The second question is about finding the length of the longest leaf-to-leaf path in a binary tree. The third question is about navigating through an integer matrix.

• For the first question, you can use a data structure like a priority queue or a hash map to keep track of the word frequencies and update the top 10 trending words accordingly.

• For the second question, you can use a re...read more

The interview questions involve finding repeating numbers in an array, counting the number of times each number is repeated, arranging data elements in increasing order, and finding the row with the maximum number of 1s in a 2D array.

• For Question 1, iterate through the array and use a hash set to track repeating numbers.

• For Question 2, use a hash map to count the occurrences of each number.

• For Question 3, merge all the frames into a single array and sort it.

• For Question 4, us...read more

The second set can follow the first set if the second number of the first set is smaller than the first number of the second set.

• Check if b < c

• If true, the second set can follow the first set

• If false, the second set cannot follow the first set

The college project involved studying various subjects like types of cooling towers, pump types and functions, compressor types, condenser types, Carnot cycle, fluid mechanics, and types of reactors.

• College project involved studying subjects like types of cooling towers, pump types, compressor types, condenser types, Carnot cycle, fluid mechanics, and types of reactors.

• Types of cooling towers include natural draft, mechanical draft, and hybrid cooling towers.

• Pump types includ...read more

Overloading is when multiple methods have the same name but different parameters, while overriding is when a subclass provides a specific implementation of a method already defined in its superclass.

• Overloading is compile-time polymorphism, while overriding is runtime polymorphism.

• Overloading is achieved within the same class, while overriding occurs between a superclass and its subclass.

• Overloading is used to provide different ways of calling the same method, while overridin...read more

HTTP is unsecured while HTTPS is secured with SSL/TLS encryption.

• HTTP stands for Hypertext Transfer Protocol, while HTTPS stands for Hypertext Transfer Protocol Secure.

• HTTP operates on port 80, while HTTPS operates on port 443.

• HTTP does not encrypt data, while HTTPS encrypts data using SSL/TLS.

• HTTP is vulnerable to eavesdropping and data tampering, while HTTPS provides confidentiality and integrity of data.

• HTTPS uses digital certificates to verify the authenticity of websites...read more

The command for hard disk partition in Linux is fdisk.

• Open the terminal and type 'sudo fdisk /dev/sda' to partition the first hard disk.

• Use 'p' to print the partition table, 'n' to create a new partition, 'd' to delete a partition, 'w' to write changes and 'q' to quit.

• Other partitioning tools in Linux include parted, gparted, and cfdisk.

A program to print random token numbers.

• Generate random numbers using a random number generator

• Convert the numbers to strings and store them in an array

• Print the token numbers from the array

The probability of getting heads or tails when flipping a coin is 50% for each outcome.

• When flipping a fair coin, there are only two possible outcomes: heads or tails.

• Since the coin has no bias, the probability of getting heads is 50% and the probability of getting tails is also 50%.

• This is because there is an equal chance for the coin to land on either side.

• The probability can be calculated by dividing the number of favorable outcomes (1 for heads or 1 for tails) by the tota...read more

Chemistry can be broadly classified into five types based on the type of matter being studied.

• Organic chemistry - study of carbon-based compounds

• Inorganic chemistry - study of non-carbon-based compounds

• Physical chemistry - study of the physical properties and behavior of matter

• Analytical chemistry - study of the composition and properties of matter

• Biochemistry - study of chemical processes in living organisms

ICD-10 is a medical classification system used for coding diagnoses and procedures.

• ICD-10 stands for International Classification of Diseases, Tenth Revision.

• It is used by healthcare providers to accurately code and classify medical diagnoses and procedures.

• ICD-10 codes are alphanumeric codes that provide detailed information about a patient's condition or treatment.

• These codes are used for medical billing, research, and statistical analysis.

• For example, ICD-10 code Z12.31 re...read more

Data Science is the study of data to extract insights and knowledge. Machine Learning is a subset of Data Science that uses algorithms to learn patterns from data.

• Data Science involves collecting, cleaning, analyzing, and interpreting data to make informed decisions

• Machine Learning algorithms include Linear Regression, Decision Trees, Random Forest, K-Means Clustering, and Neural Networks

• I have used Random Forest algorithm in my project to predict customer churn in a telecom ...read more

GLR and SSR reactors are different in terms of their design and purpose.

• GLR stands for Gas-Liquid Reactor, while SSR stands for Solid-State Reactor.

• GLR reactors are used for reactions involving gases and liquids, while SSR reactors are used for reactions involving solids.

• GLR reactors typically have a gas phase and a liquid phase, with the reactants and catalysts dissolved or suspended in the liquid phase.

• SSR reactors, on the other hand, have a solid phase where the reactants ...read more

Nacelles are aerodynamic structures on aircraft that enclose engines. They help in reducing noise by providing sound insulation and directing exhaust gases.

• Nacelles are structures on aircraft that house engines.

• They are designed to be aerodynamic to reduce drag and improve fuel efficiency.

• Nacelles provide sound insulation to reduce noise generated by the engines.

• They also help in directing exhaust gases away from the aircraft and reducing turbulence.

• By reducing noise and impr...read more

Testing milk or product quality is important to ensure safety, compliance with regulations, and customer satisfaction.

• To ensure the milk or product is safe for consumption

• To comply with quality standards and regulations

• To maintain customer satisfaction and trust

• To identify any contamination or adulteration

• To prevent health risks and foodborne illnesses

• To ensure consistency in taste, texture, and nutritional value

• To detect any spoilage or deterioration

• To verify the accuracy of...read more

Data security and privacy belong to the 'Social' area in the ESG framework.

• Data security and privacy are important social issues that impact stakeholders such as customers, employees, and the general public.

• Organizations need to protect sensitive data from breaches and unauthorized access to maintain trust and credibility.

• Examples include implementing encryption protocols, access controls, and privacy policies to safeguard data.

• Non-compliance with data protection regulations ...read more

Bulletproof jackets are made using a composite material called Kevlar.

• Kevlar is a strong and lightweight synthetic fiber.

• It is five times stronger than steel on an equal weight basis.

• Kevlar is resistant to cuts, abrasions, and heat.

• It is commonly used in bulletproof vests, helmets, and other protective gear.

Decision tree is a tree-like model used for classification and regression. Keras is a deep learning library and Random forest is an ensemble learning method.

• Decision tree is a supervised learning algorithm that works by recursively splitting the dataset into subsets based on the most significant attribute.

• Keras is a high-level neural networks API written in Python that runs on top of TensorFlow, CNTK, or Theano. It is used for building and training deep learning models.

• Random...read more

The least count of digital vernier caliper is 0.01mm and normal vernier caliper is 0.02mm.

• Digital vernier caliper has a resolution of 0.01mm or 0.0005 inches.

• Normal vernier caliper has a resolution of 0.02mm or 0.001 inches.

• Least count is the smallest measurement that can be read on the scale.

• It is important to know the least count for accurate measurements.

Stay neutral and provide factual information without expressing personal opinions.

• Remain calm and composed

• Avoid expressing personal opinions

• Stick to factual information

• Provide multiple perspectives if applicable

• Encourage further research and discussion

Essential components of milk are water, fat, protein, lactose, vitamins, and minerals. Preservation methods include pasteurization, sterilization, and refrigeration.

• Water is the main component of milk

• Fat provides flavor and texture

• Protein is essential for growth and repair

• Lactose is the primary carbohydrate in milk

• Vitamins and minerals are important for overall health

• Preservation methods include pasteurization, sterilization, and refrigeration

We use step-up transformers to reduce power loss during transmission by increasing voltage and decreasing current.

• Step-up transformers increase voltage and decrease current, which reduces power loss during transmission.

• This is because power loss is proportional to the square of the current, so reducing current reduces power loss.

• For example, power is transmitted over long distances at high voltages (e.g. 500 kV) to reduce power loss.

• Step-down transformers are used at the end ...read more

An associated enterprise is a company that has a significant influence over another company's operations.

• An associated enterprise is determined by the level of control or influence it has over another company.

• There are six criteria to determine if a company is an associated enterprise.

• These criteria include ownership, control, management, financial transactions, technology, and business operations.

• For example, if Company A owns more than 50% of Company B, then Company B is co...read more

CNC machines are computer-controlled machines that can perform complex tasks with high precision and accuracy.

• CNC machines use computer programs to control their movements and operations

• Conventional machines are manually operated and require skilled operators

• CNC machines can produce parts with higher accuracy and consistency

• CNC machines can perform multiple operations without the need for manual intervention

• Examples of CNC machines include CNC mills, lathes, routers, and plas...read more

I am proficient in AWS cloud services.

• I have experience in EC2, S3, Lambda, and RDS.

• I have worked on deploying and managing applications on AWS.

• I am familiar with AWS CLI and SDKs.

• I have knowledge of AWS security and compliance best practices.

• I have experience in setting up and managing VPCs and subnets.

I have intermediate level programming knowledge.

• Proficient in Python and Java

• Familiar with HTML, CSS, and JavaScript

• Experience with database management using SQL

• Completed several programming projects in college

• Continuously learning and improving skills through online courses

Explanation of direct and indirect taxes with examples and calculation basis.

• Direct tax is levied on income or profits, while indirect tax is levied on goods and services.

• Examples of direct tax include income tax, corporate tax, and wealth tax, while examples of indirect tax include GST, excise duty, and customs duty.

• Direct tax is calculated based on the income or profits earned by an individual or company, while indirect tax is calculated based on the value of goods or servi...read more

CNC codes are instructions used in computer numerical control (CNC) machines to control the movement and operation of tools.

• G-codes: Control the movement and positioning of the machine

• M-codes: Control auxiliary functions such as coolant or spindle speed

• T-codes: Specify the tool to be used

• F-code: Sets the feed rate

• S-code: Sets the spindle speed

• X, Y, Z-codes: Control the movement along the X, Y, and Z axes

Design a HTML page with a button to print text when clicked.

• Create a button element in HTML

• Add an onclick event to the button

• In the onclick event, use JavaScript to print the desired text

Transfer pricing is the practice of determining the value of goods or services exchanged between related entities. Arm's length price is the price at which unrelated parties would transact.

• Transfer pricing is used by multinational companies to allocate profits and taxes between different countries.

• It involves setting prices for goods and services that are transferred between different subsidiaries of the same company.

• The arm's length principle is used to ensure that the price...read more

PH is a measure of acidity or basicity of a solution. It ranges from 1 to 14, with 7 being neutral.

• PH = - log into base H+ ion concentration

• Range of PH: 1 to 6.9 acidic, 6.9 to 7.1 neutral, 7.1 to 14 basic

• Acidic solutions have a higher concentration of H+ ions, while basic solutions have a higher concentration of OH- ions

• PH is important in many fields, including chemistry, biology, and environmental science

Answering questions related to precision, instruments, units, and basic drawing knowledge.

• Precision refers to the degree of accuracy in measurements.

• Instruments used in previous company depend on the industry and job role.

• L.C. stands for Least Count and refers to the smallest measurement that can be made with an instrument.

• Digital vernier and micrometer have different L.C. values.

• R.T. unit can refer to Resistance Temperature or Room Temperature depending on the context.

• Cylind...read more

The least count of a vernier is the smallest measurement that can be read on the scale.

• The least count is determined by the number of divisions on the main scale and the vernier scale.

• It is calculated by dividing the smallest division on the main scale by the number of divisions on the vernier scale.

• For example, if the smallest division on the main scale is 0.1 mm and the vernier scale has 10 divisions, the least count would be 0.01 mm.

Chemistry is the scientific study of matter, its properties, and interactions with other matter and energy.

• Chemistry is divided into five main branches: organic chemistry, inorganic chemistry, analytical chemistry, physical chemistry, and biochemistry.

• PH is a measure of the acidity or basicity of a solution, with a range of 0-14. A pH of 7 is neutral, below 7 is acidic, and above 7 is basic.

• Other important concepts in chemistry include chemical reactions, stoichiometry, therm...read more

During servicing of the two wheeler, I observed various parts and components.

• Checked the engine oil level and replaced it if necessary

• Inspected the air filter and cleaned or replaced it

• Checked the brake pads and replaced them if worn out

• Inspected the chain and sprocket and lubricated them

• Checked the tire pressure and adjusted it if required

• Inspected the electrical system and replaced any faulty components

• Tested the brakes and suspension for proper functioning

• Cleaned the bike ...read more

TDS rates vary based on the type of transaction. Certain transactions are exempt from TDS.

• TDS rates range from 1% to 30% depending on the type of transaction

• Salary income is subject to TDS, with rates based on income slabs

• Certain transactions like interest earned on savings accounts and small savings schemes are exempt from TDS

• TDS is not applicable on transactions below a certain threshold amount

• TDS can be avoided by submitting Form 15G/15H for certain types of income

Basic quality management for a company involves implementing processes and systems to ensure products or services meet customer expectations.

• Establishing quality objectives and policies

• Implementing quality control measures

• Monitoring and measuring performance

• Continuous improvement through feedback and corrective actions

• Training employees on quality standards

• Documenting and maintaining quality records

• Conducting regular audits and inspections

Answering questions related to programming concepts and languages.

• Global variables are accessible throughout the program and can be used to store values that need to be accessed by multiple functions.

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

• Java is platform-independent and has automatic memory management, while C++ is faster and allows for more control over memory management.

• Other questions may include topics such...read more

Airplanes propel through the use of jet engines or propellers.

• Jet engines work by sucking in air and compressing it before mixing it with fuel and igniting it to create a high-pressure exhaust that propels the plane forward.

• Propellers work by spinning and creating a force that pushes the plane forward.

• Some planes also use a combination of both jet engines and propellers.

• The shape of the wings also plays a role in propelling the plane forward by creating lift and reducing drag...read more

C form is a sales tax form used for interstate sales. It is submitted to the sales tax department of the purchasing state.

• C form is a document used in India for interstate sales.

• It is issued by the selling party to the purchasing party.

• The C form is used to avail concessional sales tax rates.

• It is submitted to the sales tax department of the purchasing state.

• The purchasing party needs to maintain a record of C forms received.

• C forms are valid for a specific period and need to...read more

The interview questions cover topics related to vehicle engineering such as SFBMD, engine power and torque curve, and general vehicle knowledge.

• SFBMD analysis involves identifying inflection points and maximum bending stress locations for multiple scenarios.

• Engine power and torque curve shows the relationship between engine speed and power output, and torque output. Interpretation involves understanding the engine's performance characteristics.

• General vehicle knowledge includ...read more

Tolerance refers to the ability to accept and endure something that is different or disagreeable.

• Tolerance is the willingness to respect and accept the beliefs, opinions, and behaviors of others.

• It involves being open-minded and non-judgmental towards people who have different backgrounds, cultures, or perspectives.

• Tolerance promotes harmony, understanding, and empathy in diverse communities.

• Examples of tolerance include accepting different religions, respecting different pol...read more

I switched to sustainability in IT because I believe in the importance of environmental responsibility and making a positive impact.

• Passion for environmental conservation and sustainability

• Desire to make a positive impact through work

• Interest in green technology and renewable energy

• Belief in the importance of corporate social responsibility

• Alignment with personal values and ethics

JavaScript is a programming language used to create interactive web pages. Console.log() is used to print messages in the console.

• JavaScript is a client-side scripting language

• It is used to add interactivity to web pages

• console.log() is used to print messages in the console

Answers to questions related to engineering and manufacturing.

• GD&T stands for Geometric Dimensioning and Tolerancing, which is a system used to define and communicate engineering tolerances.

• ID and OD refer to the inner and outer diameters of a cylindrical object, respectively.

• CNC (Computer Numerical Control) machines are automated tools that use pre-programmed software to control the movement of machinery and tools.

• The process of CNC machining involves designing a 3D model, c...read more

To check if a string can become a palindrome, count the frequency of each character. If there is at most one character with an odd frequency, it can be rearranged into a palindrome.

• Count the frequency of each character in the string

• Check if there is at most one character with an odd frequency

• If yes, the string can be rearranged into a palindrome

The combination of solder paste in SMT line typically consists of flux, solder powder, and other additives.

• Flux is used to clean and prepare the surfaces to be soldered.

• Solder powder is the main component that forms the solder joint.

• Additives may include thickeners, activators, and other materials to improve the soldering process.

• Example: A common combination is 60% solder powder, 35% flux, and 5% additives.