40+ SIKA Aerospace & Defence Interview Questions and Answers

A program to print Fibonacci series using recursion.

• Define a recursive function that takes an integer n as input

• Base case: if n is 0 or 1, return n

• Recursive case: return the sum of the previous two Fibonacci numbers

• Call the recursive function with the desired number of terms and print the result

Structure is a collection of variables of different data types while union is a collection of variables of same data type.

• Structure allocates memory for all its variables while union allocates memory for only one variable at a time.

• Structure is used when we want to store different types of data while union is used when we want to store only one type of data.

• Structure is accessed using dot operator while union is accessed using arrow operator.

• Example of structure: struct stude...read more

Dangling pointers can be avoided by setting them to NULL after freeing the memory they point to.

• Always initialize pointers to NULL.

• Set pointers to NULL after freeing the memory they point to.

• Avoid accessing memory through a pointer after it has been freed.

• Use smart pointers or garbage collection to automate memory management.

A paint shop is a facility where vehicles or other objects are painted with a protective coating.

• Paint shops are commonly found in automotive manufacturing plants.

• They may also be standalone facilities that specialize in painting vehicles or other objects.

• Paint shops typically use a variety of equipment, including spray guns, paint booths, and drying ovens.

• The paint used in a paint shop is typically a specialized automotive paint that is designed to provide a durable and long...read more

Power supplied from a socket is alternating current (AC).

• Most household sockets provide AC power

• AC power changes direction periodically

• DC power is commonly used in batteries and some electronics

Typical voltage supplied by an electrical socket is 120 volts, while the current can vary depending on the country and type of socket.

• Voltage supplied by an electrical socket is typically around 120 volts

• Current supplied can vary depending on the country and type of socket

• In the US, standard electrical sockets provide 120 volts AC at 15-20 amps

• In Europe, standard electrical sockets provide 230 volts AC at 16 amps

To measure current with a multimeter, set the multimeter to the current measurement mode, connect the multimeter in series with the circuit, and read the current value displayed on the multimeter.

• Set the multimeter to the current measurement mode (usually denoted by 'A' for Amperes)

• Turn off the power to the circuit before connecting the multimeter in series

• Connect the multimeter in series with the circuit - place the multimeter in the path of the current flow

• Read the current ...read more

Arduino Uno has 14 digital pins and 6 analog pins for coding programs.

• Arduino Uno has 14 digital pins (0-13) and 6 analog pins (A0-A5)

• Digital pins can be used for input/output operations while analog pins can read analog signals

• To code programs in Arduino, you can use the Arduino IDE and write C/C++ based sketches

Discrete components are individual electronic components that are separate and distinct from each other.

• Discrete components are used to build electronic circuits.

• They are separate and distinct from integrated circuits.

• Examples of discrete components include resistors, capacitors, transistors, and diodes.

An ultrasonic sensor is a device that uses sound waves with frequencies higher than the upper audible limit of human hearing to measure distances.

• Ultrasonic sensors emit high-frequency sound waves and measure the time it takes for the waves to bounce back after hitting an object.

• They are commonly used for distance measurement, object detection, and obstacle avoidance.

• Ultrasonic sensors can be found in various applications such as parking sensors, robotics, industrial automati...read more

LSA focuses on layering data for efficient reporting, while LSA++ adds additional layers for better performance and flexibility.

• LSA (Layered Scalable Architecture) focuses on layering data into Persistent Staging Area (PSA), Data Store (DS), and InfoCube for efficient reporting.

• LSA++ adds additional layers like Data Mart Layer and Virtualization Layer for better performance and flexibility.

• LSA++ allows for real-time reporting and faster data access compared to LSA.

• LSA++ enabl...read more

Embedded C is a subset of the C programming language, specifically designed for programming embedded systems.

• Embedded C is optimized for resource-constrained systems with limited memory and processing power.

• It includes additional keywords and features for controlling hardware directly.

• Embedded C often involves working with microcontrollers, sensors, and other hardware components.

• Regular C can be used for general-purpose programming on desktop or server systems.

The OSI model is a conceptual framework that standardizes the functions of a communication system into seven layers.

• The OSI model stands for Open Systems Interconnection model.

• It was developed by the International Organization for Standardization (ISO) in 1984.

• The model divides the communication process into seven layers, each with its own specific functions and protocols.

• The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each laye...read more

AM and FM are two types of modulation techniques used in radio broadcasting.

• AM stands for Amplitude Modulation, where the amplitude of the carrier wave is varied to transmit information.

• FM stands for Frequency Modulation, where the frequency of the carrier wave is varied to transmit information.

• AM is commonly used for broadcasting in the medium wave and long wave bands.

• FM is commonly used for broadcasting in the VHF (Very High Frequency) band.

• AM signals are more susceptible t...read more

LO Extraction in SAP BW involves different methods to extract data from source systems into BW system.

• Full extraction - extracts all data from source system

• Delta extraction - extracts only new or changed data since last extraction

• Initialization - initial extraction of data from source system

• Generic extraction - allows extraction of data from any table in source system

The alternator generates electricity to power the vehicle's electrical system, while the stator is a stationary component that helps produce electricity in the alternator.

• Alternator converts mechanical energy into electrical energy

• Stator is a stationary part of the alternator

• Stator contains wire windings that produce electricity when the rotor spins

• Alternator charges the battery and powers the electrical system of the vehicle

A virtual function is a function in a base class that is declared using the keyword 'virtual' and can be overridden by a function with the same signature in a derived class.

• Virtual functions allow for dynamic polymorphism in object-oriented programming.

• They are used to achieve runtime polymorphism by allowing a function to be called based on the type of object it is called on.

• Virtual functions are declared in a base class and can be overridden in derived classes to provide sp...read more

QRQC stands for Quick Response Quality Control, a problem-solving methodology used in manufacturing and engineering.

• QRQC is a structured approach to identifying and resolving problems quickly

• It involves cross-functional teams working together to analyze and solve issues

• QRQC is often used in manufacturing and engineering industries to improve quality and efficiency

• The process typically involves four steps: identify the problem, contain the issue, analyze the root cause, and im...read more

Prepayment is payment made in advance for goods or services, while accrual is recording revenues and expenses when they are incurred, regardless of when cash is exchanged.

• Prepayment involves paying for goods or services before receiving them

• Accrual involves recognizing revenues and expenses when they are incurred, not when cash is exchanged

• Prepayment is recorded as an asset on the balance sheet until the goods or services are received

• Accrual ensures that financial statements ...read more

BRS stands for Bank Reconciliation Statement, which is a statement prepared to reconcile the balance as per bank statement with the balance as per company's books. Financial statements are reports that show the financial performance and position of a company.

• BRS is prepared to ensure that the company's records match the bank's records

• It helps in identifying any discrepancies or errors in recording transactions

• Financial statements include Balance Sheet, Income Statement, Cash ...read more

The standard refers to a set of guidelines, specifications, or criteria that define the expected level of quality or performance for a particular product, process, or system.

• Standards provide a benchmark for quality and ensure consistency and reliability.

• They help in achieving uniformity and interoperability.

• Standards can be industry-specific, such as ISO 9001 for quality management systems.

• They can also be product-specific, like safety standards for electrical appliances.

• Sta...read more

Structure is a collection of variables of different data types while union is a collection of variables of same data type.

• Structure allocates memory for all its variables while union allocates memory for only one variable at a time.

• Structure is used when we want to store different types of data while union is used when we want to store only one type of data.

• Structure is accessed using dot operator while union is accessed using arrow operator.

• Example of structure: struct stude...read more

Polymorphism is the ability of a function or method to behave differently based on the object it is acting upon.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types or classes.

• Examples include method overloading and method overriding in object-oriented programming.

Casting and forging machining process flow involves several steps to transform raw materials into finished products.

• Casting process: molten metal is poured into a mold and allowed to solidify

• Forging process: metal is heated and shaped by applying compressive force

• Machining process: removing excess material to achieve desired shape and dimensions

• Common machining techniques include turning, milling, drilling, and grinding

• Final steps involve inspection, finishing, and quality co...read more

Variables in Bex query allow users to input values at runtime to filter data dynamically.

• Variables can be used to restrict data based on user input

• They can be defined as mandatory or optional

• Different types of variables include characteristic, hierarchy node, formula, text, and user entry

• Example: Creating a variable for fiscal year to allow users to select a specific year

Watchdogs are hardware or software timers that monitor the operation of a system and reset it if it fails to respond within a certain time.

• Watchdogs are used to ensure the reliability and safety of embedded systems.

• They can be implemented as hardware or software timers.

• Watchdogs monitor the system by periodically checking for a response or heartbeat signal.

• If the system fails to respond within a specified time, the watchdog timer triggers a system reset.

• Examples of watchdogs ...read more

Training performance can be overseen through regular evaluations, feedback from participants, and tracking key metrics.

• Conduct regular evaluations to assess the effectiveness of training programs

• Collect feedback from participants to understand their learning experience and areas for improvement

• Track key metrics such as training completion rates, knowledge retention, and application of learning in the workplace

• Use data analytics to analyze training performance and identify tre...read more

Working software is software that is functional, reliable, and meets the requirements of the end users.

• Working software should be able to perform the tasks it was designed for without errors or bugs.

• It should be reliable and consistent in its performance.

• The software should meet the needs and expectations of the end users.

• Regular updates and maintenance should be done to ensure the software remains in working condition.

• Examples: Microsoft Office, Adobe Photoshop, Google Chrom...read more

Master node manages the cluster and worker nodes perform tasks assigned by the master node.

• Master node controls the cluster and delegates tasks to worker nodes

• Worker nodes perform the actual work assigned by the master node

• Master node maintains the overall state of the cluster and worker nodes report their status to the master node

An alternator is a device that converts mechanical energy into electrical energy, while a stator is the stationary part of a rotary system.

• Alternator is used in vehicles to charge the battery and power the electrical system

• Stator is the stationary part of an electric motor or generator

• Alternator produces alternating current (AC) while stator helps in generating a magnetic field

Insertion sort is a simple sorting algorithm that builds the final sorted array one item at a time.

• Start from the second element and compare it with the elements before it to find the correct position.

• Repeat this process for all elements in the array.

• Time complexity is O(n^2) in the worst case scenario.

• Example: void insertionSort(string arr[], int n) { for (int i = 1; i < n; i++) { string key = arr[i]; int j = i - 1; while (j >= 0 && arr[j] > key) { arr[j + 1] = arr[j]; j--; ...read more

Matrix chain multiplication is a dynamic programming problem to find the most efficient way to multiply a given sequence of matrices.

• Use dynamic programming to solve this problem efficiently.

• Create a 2D array to store the minimum number of multiplications needed to multiply matrices.

• Iterate over different combinations of matrices to find the optimal solution.

• Example: For matrices A, B, C with dimensions 10x30, 30x5, 5x60, the optimal way to multiply them is (A(BC)).

RTOS stands for Real-Time Operating System. It is an operating system designed for real-time applications.

• RTOS is specifically designed to handle real-time tasks with strict timing requirements.

• It provides features like task scheduling, inter-task communication, and resource management.

• Examples of popular RTOS include FreeRTOS, VxWorks, and QNX.

• RTOS is commonly used in embedded systems, automotive systems, and industrial control systems.

Pods are the smallest deployable units in Kubernetes, consisting of one or more containers sharing resources.

• Pods are used to run containers in Kubernetes.

• Each pod has its own IP address and storage resources.

• Pods can contain multiple containers that share resources like storage and network.

• Nodes are individual machines in a Kubernetes cluster where pods are deployed.

• Nodes can run multiple pods, and each node has its own set of resources like CPU and memory.

The technical issues process and capabilities are crucial for a Design Lead.

• Explain the steps involved in identifying and resolving technical issues.

• Discuss the tools and technologies you are familiar with for troubleshooting technical problems.

• Highlight your experience in managing technical issues within a design team.

• Provide examples of successful problem-solving in previous design projects.

• Demonstrate your ability to communicate and collaborate with cross-functional teams ...read more

Memory hierarchy in OS refers to the organization of different types of memory in a computer system.

• Memory hierarchy typically includes registers, cache memory, main memory (RAM), and secondary storage (hard drive, SSD).

• Registers are the fastest and smallest type of memory, located within the CPU.

• Cache memory is a small, fast memory located between the CPU and main memory, used to store frequently accessed data.

• Main memory (RAM) is larger but slower than cache memory, used to...read more

Buck and boost converters are types of DC-DC converters used to step down or step up voltage levels.

• Buck converter steps down voltage by turning on and off a switch to control current flow

• Boost converter steps up voltage by storing energy in an inductor and releasing it to the output

• Both converters are used in power supplies, battery chargers, and LED drivers

Winding is the process of wrapping a material around a core or spool to create a coil or roll.

• Winding is commonly used in the manufacturing of electrical coils, transformers, inductors, and motors.

• The material being wound can be wire, thread, yarn, tape, or any other flexible material.

• The winding process can be done manually or using automated machinery.

• Examples include winding copper wire around a bobbin to create a transformer coil, or winding thread around a spool for sewi...read more

52wh word is a term used in quality engineering to refer to a specific type of problem-solving technique.

• 52wh word stands for Who, What, Where, When, Why, How, How much, How many, and How often.

• It is used to systematically analyze a problem by asking these key questions.

• For example, when faced with a quality issue in a manufacturing process, a quality engineer may use the 52wh word technique to identify the root cause of the problem.

A buck converter is a type of DC-DC converter that steps down voltage while increasing current.

• Converts higher voltage to lower voltage

• Uses inductor and capacitor to store and release energy

• Efficient for battery-powered devices

• Example: Charging a smartphone from a higher voltage source

Good quality can be achieved by implementing strict quality control measures, using high-quality materials, and continuous improvement processes.

• Implement strict quality control measures to ensure consistency and reliability of products

• Use high-quality materials to enhance the durability and performance of the products

• Implement continuous improvement processes such as Six Sigma or Lean manufacturing to identify and eliminate defects

• Train employees on quality standards and bes...read more

Suzuki total work process involves the entire workflow from production to delivery.

• Includes manufacturing, inventory management, transportation, and distribution

• Focuses on efficiency, cost-effectiveness, and timely delivery

• Utilizes technology for tracking and optimizing processes

• Involves coordination between suppliers, manufacturers, and distributors

Memory leak is a situation where a program fails to release memory it has allocated, leading to a gradual loss of available memory.

• Memory leaks occur when a program allocates memory but does not release it when it is no longer needed.

• This can lead to a gradual decrease in available memory, eventually causing the program or system to crash.

• Common causes of memory leaks include improper management of dynamic memory allocation and circular references.

• Examples of memory leaks can...read more

Developed a web application for tracking project progress and managing tasks

• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express for back-end

• Utilized MongoDB for database storage