30+ ARM Embedded Technologies Interview Questions and Answers

Implemented various improvements to resolve quality related issues using tools such as Six Sigma and Lean Management.

• Implemented Six Sigma and Lean Management methodologies to identify and resolve quality related issues

• Reduced defects by 20% through process improvements

• Implemented a new quality control system resulting in a 15% increase in customer satisfaction

• Trained team members on quality improvement techniques to ensure sustainability of improvements

These are quality control methodologies used in manufacturing processes.

• 8D is an eight-step problem-solving process used to identify, correct, and prevent problems

• FMEA is a risk assessment tool used to identify and prioritize potential failures in a process

• PPAP is a process used to ensure that suppliers have met all customer requirements before production begins

• SPC is a statistical process control method used to monitor and control a process

• MSA is a measurement system analysi...read more

Major breakdowns include server crashes, while minor breakdowns may involve software glitches.

• Major breakdown: Server crash - Solution: Restart server and investigate root cause

• Minor breakdown: Software glitch - Solution: Update software or restart application

• Major breakdown: Network failure - Solution: Check network connections and troubleshoot

• Minor breakdown: Printer jam - Solution: Clear jammed paper and reset printer

During a line down situation, managing line output involves troubleshooting, identifying the root cause, implementing solutions, and communicating with stakeholders.

• Quickly troubleshoot to identify the root cause of the line down

• Implement temporary solutions to restore line output if possible

• Communicate with relevant teams and stakeholders to keep them informed

• Work on permanent solutions to prevent future line down situations

• Document the incident and steps taken for future re...read more

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant finish.

• Anodizing involves immersing the metal in an electrolyte solution and passing an electric current through it.

• The process creates a protective oxide layer on the metal surface, improving its resistance to corrosion and wear.

• Different types of anodizing include sulfuric acid anodizing, chromic acid anodizing, and hardcoat anodizing.

• Anodized aluminum is ...read more

Security systems at a checkpoint include CCTV cameras, metal detectors, X-ray machines, access control systems, and biometric scanners.

• CCTV cameras are used for continuous monitoring of the area

• Metal detectors are used to detect any metal objects on individuals passing through

• X-ray machines are used to scan bags and luggage for prohibited items

• Access control systems restrict entry to authorized personnel only

• Biometric scanners verify identity through unique physical character...read more

Line rejection format can be captured by analyzing rejection trends, identifying common reasons, and implementing solutions.

• Analyze rejection data to identify patterns and trends

• Identify common reasons for rejection and categorize them

• Implement solutions to address the root causes of rejection

• Regularly review and update the rejection format to improve efficiency

OEE stands for Overall Equipment Effectiveness. It is a measure of how well a manufacturing process is performing.

• OEE is calculated by multiplying Availability, Performance, and Quality.

• Availability = (Operating Time / Planned Production Time) * 100%

• Performance = (Ideal Cycle Time / Total Cycle Time) * 100%

• Quality = (Good Count / Total Count) * 100%

• OEE = Availability * Performance * Quality

• For example, if a machine operates for 8 hours out of a planned 10 hours, with a perfor...read more

I monitor production records by regularly reviewing reports, analyzing data, conducting spot checks, and ensuring compliance with set targets.

• Regularly review production reports to track progress

• Analyze data to identify trends and areas for improvement

• Conduct spot checks to ensure accuracy of records

• Ensure compliance with set production targets

Fire safety involves preventive measures to reduce the risk of fires and knowing how to react in case of a fire emergency.

• Fire safety includes having working smoke detectors, fire extinguishers, and an evacuation plan.

• Preventive measures include keeping flammable materials away from heat sources, not overloading electrical outlets, and regular maintenance of heating systems.

• In case of a fire, react by alerting others, evacuating the building following the escape plan, and cal...read more

CCTV and access control systems are used for monitoring and controlling access to a premises.

• CCTV stands for Closed Circuit Television and is used for surveillance and monitoring purposes.

• Access control systems are used to restrict and monitor access to a building or specific areas within a building.

• CCTV cameras can be used indoors and outdoors to monitor activities and deter criminal behavior.

• Access control systems can include keypads, card readers, biometric scanners, and o...read more

Difference and least count of measuring instruments

• Difference: Range of values that can be measured by the instrument

• Least count: Smallest change in the quantity being measured that can be detected by the instrument

• Examples: Vernier caliper - Difference: 0-150mm, Least count: 0.02mm; Micrometer screw gauge - Difference: 0-25mm, Least count: 0.01mm

Phases in new product development include ideation, design, prototyping, testing, production, and launch.

• Ideation: Generating ideas for new products based on market research and customer needs.

• Design: Creating detailed plans and specifications for the product.

• Prototyping: Building a working model or prototype to test the design.

• Testing: Conducting various tests to ensure the product meets quality standards.

• Production: Setting up manufacturing processes and producing the final...read more

Different types of maintenance include preventive, corrective, predictive, and proactive maintenance.

• Preventive maintenance involves regular inspections and maintenance to prevent breakdowns.

• Corrective maintenance is performed after a failure occurs to restore equipment to working condition.

• Predictive maintenance uses data and analytics to predict when maintenance is needed.

• Proactive maintenance involves identifying and addressing potential issues before they cause problems.

Excel is a spreadsheet program used for data analysis, organization, and calculation.

• Excel is a software application developed by Microsoft.

• It allows users to create and manipulate spreadsheets.

• Spreadsheets consist of rows and columns, where data can be entered and formulas can be applied.

• Excel offers various functions and features for data analysis, such as sorting, filtering, and creating charts.

• It is commonly used in business, finance, and research for tasks like budgeting...read more

A testing engineer is responsible for designing and implementing testing processes to ensure software quality.

• Designing test plans and test cases

• Executing test cases and reporting bugs

• Collaborating with developers to resolve issues

• Automating test cases using tools like Selenium

• Ensuring software meets quality standards before release

There are two main types of hydraulics: hydraulic systems and hydraulic fluids.

• Hydraulic systems can be categorized as hydraulic pumps, hydraulic cylinders, hydraulic motors, and hydraulic valves.

• Hydraulic fluids can be categorized as mineral oil-based, water-based, and synthetic-based.

• Examples of hydraulic systems include hydraulic brakes in vehicles and hydraulic lifts in industrial machinery.

• Examples of hydraulic fluids include hydraulic oil, water-glycol, and phosphate es...read more

Pneumatics and hydraulics systems are used in engineering for power transmission and control.

• Pneumatics systems use compressed air to transmit power, commonly used in industries for automation and control.

• Hydraulics systems use pressurized liquid (usually oil) to transmit power, commonly used in heavy machinery like excavators and hydraulic presses.

• Pneumatics systems are generally faster but less powerful than hydraulics systems.

• Hydraulics systems are more precise and can han...read more

TPM, TQM, and Kaizen are pillars of continuous improvement in manufacturing processes.

• Total Productive Maintenance (TPM) focuses on maximizing equipment effectiveness through proactive maintenance.

• Total Quality Management (TQM) emphasizes quality control and continuous improvement in all aspects of the organization.

• Kaizen is a Japanese philosophy of continuous improvement involving all employees in making small, incremental changes.

• Other pillars may include 5S (Sort, Set in o...read more

Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts.

• Anodizing involves immersing the aluminum in an electrolyte bath and passing an electric current through it to create a protective oxide layer on the surface.

• The aluminum oxide layer is hard, durable, and corrosion-resistant, providing increased wear resistance and improved adhesion for paint primers and glues.

• Anodized aluminum can be dyed i...read more

Hydraulic pump functions by converting mechanical power into hydraulic energy to generate flow or pressure in a hydraulic system.

• Hydraulic pump takes in fluid from a reservoir and delivers it to the rest of the hydraulic system.

• It generates flow or pressure to move the hydraulic fluid through the system.

• There are different types of hydraulic pumps such as gear pumps, vane pumps, and piston pumps.

• The pump creates a vacuum at the inlet which draws the fluid into the system and ...read more

OEE can be calculated by multiplying Availability, Performance, and Quality percentages.

• Calculate Availability: (Operating Time - Downtime) / Operating Time

• Calculate Performance: (Ideal Cycle Time * Total Count) / Operating Time

• Calculate Quality: Good Count / Total Count

• Multiply Availability, Performance, and Quality percentages to get OEE

The eight pillars refer to the key areas of maintenance management that are essential for ensuring optimal performance and reliability of equipment.

• 1. Planning and scheduling maintenance activities

• 2. Equipment reliability and condition monitoring

• 3. Spare parts management

• 4. Maintenance workforce management

• 5. Health, safety, and environmental considerations

• 6. Continuous improvement and innovation

• 7. Budgeting and cost control

• 8. Regulatory compliance and documentation

MS Word is a word processing software used for creating and editing documents. Spreadsheet is a software used for organizing and analyzing data.

• MS Word is used for creating and editing documents, such as letters, reports, and resumes.

• It provides various formatting options like font styles, sizes, and colors, as well as features like spell check and grammar check.

• Spreadsheets are used for organizing and analyzing data, such as financial information, inventory lists, and projec...read more

Speed and feed formula is used in machining to determine the optimal cutting parameters for a specific material and tool.

• Speed and feed formula calculates the spindle speed (RPM) and feed rate (IPM) for a given material and tool combination.

• The formula takes into account factors such as material type, tool diameter, and desired surface finish.

• For example, the formula for calculating spindle speed is: RPM = (CS x 4) / D, where CS is cutting speed and D is tool diameter.

Mean time between failure is a measure of reliability, indicating the average time between failures of a system.

• MTBF is calculated by dividing the total operational time by the number of failures.

• It is commonly used in industries like manufacturing, automotive, and electronics to assess the reliability of products.

• For example, if a computer system operates for 1000 hours with 10 failures, the MTBF would be 100 hours.

7QC tools are a set of quality control tools used in lean manufacturing to identify and solve production problems.

• Check Sheet: Used to collect and analyze data in a systematic way.

• Pareto Chart: Helps prioritize issues by showing the most significant factors.

• Cause and Effect Diagram (Fishbone Diagram): Identifies root causes of problems.

• Histogram: Visualizes data distribution to identify patterns.

• Scatter Diagram: Shows the relationship between two variables.

• Control Chart: Moni...read more

MTTR stands for Mean Time To Repair, which is the average time taken to repair a failed component or system.

• MTTR is calculated by dividing the total downtime by the number of failures.

• It is an important metric in maintenance management to assess the efficiency of maintenance processes.

• For example, if a machine is down for a total of 10 hours due to 2 breakdowns, the MTTR would be 5 hours (10 hours / 2 breakdowns).

The speed at which fixed parts are inserted depends on various factors such as the complexity of the part and the efficiency of the assembly process.

• The speed of fixed parts insertion can be influenced by the design of the parts themselves - simpler parts may be inserted faster than complex parts.

• Efficiency of the assembly process, including the use of automation or manual labor, can also impact the speed of fixed parts insertion.

• Factors such as the accuracy of the machinery ...read more

The issue with the TV service software was resolved.

• Identified the root cause of the software issue

• Developed a patch to fix the issue

• Tested the patch on multiple TV models

• Deployed the patch to affected customers' devices

• Ensured the software update did not cause any new issues

Lean Manufacturing is a systematic method for eliminating waste within a manufacturing process to improve efficiency and quality.

• Focuses on reducing waste in all forms, including time, materials, and resources

• Involves continuous improvement and employee involvement in problem-solving

• Emphasizes value stream mapping to identify and eliminate non-value-added activities

• Utilizes tools such as 5S, Kanban, and Just-in-Time production

• Aims to increase productivity, reduce lead times, ...read more

RPN (Risk Priority Number) is calculated by multiplying Severity, Occurrence, and Detection ratings for a potential failure mode.

• RPN = Severity x Occurrence x Detection

• Assign a rating from 1 to 10 for Severity, Occurrence, and Detection (10 being the highest)

• Multiply the ratings to get the RPN value

• Higher RPN values indicate higher risk levels