Carl Zeiss Data Engineer Interview Questions and Answers

malloc is a function in C that dynamically allocates memory on the heap. It is used to allocate memory for variables or data structures.

• malloc is used in C programming language.

• It is used to allocate memory on the heap.

• malloc is different from 'new' in C++ as it does not call constructors for objects.

C++ is a general-purpose programming language while Objective C is a superset of C used for iOS and macOS development.

• C++ is widely used for developing applications, games, and system software.

• Objective C is mainly used for iOS and macOS development.

• C++ supports both procedural and object-oriented programming paradigms.

• Objective C is an object-oriented language with dynamic runtime features.

• C++ has a larger community a...read more

Class container is a class that holds objects of other classes, while class composition is a way to combine multiple classes to create a new class.

• Class container holds objects of other classes, acting as a collection or container.

• Class composition combines multiple classes to create a new class with its own behavior and attributes.

• In class container, the objects are typically stored in a data structure like an array o...read more

Divide the horses into groups of 5 and race them. Take the top 2 from each race and race them again. Finally, race the top 2 horses to determine the top 3.

• Divide the horses into 3 groups of 5 and race them.

• Take the top 2 horses from each race and race them again.

• Finally, race the top 2 horses to determine the top 3.

Developing a real-time data processing system for a high-traffic e-commerce website

• Implemented a distributed system architecture to handle large volumes of data

• Optimized algorithms for efficient data processing and storage

• Utilized caching mechanisms to improve system performance

• Worked closely with cross-functional teams to troubleshoot and resolve issues

• Example: Successfully reduced data processing time by 50% by imple

Seeking new challenges and opportunities for growth.

• Looking for a more challenging role to further develop my skills

• Interested in exploring new technologies and industries

• Seeking better career advancement opportunities

• Want to work in a more collaborative team environment

The width of a tree is the maximum number of nodes at any level in the tree.

• To calculate the width of a tree, we can perform a level order traversal and keep track of the maximum number of nodes at any level.

• We can use a queue data structure to perform the level order traversal.

• At each level, we count the number of nodes in the queue and update the maximum width if necessary.

Need more context. What needs to be done with the large rectangle?

• What are the dimensions of the rectangle?

• Is it a 2D or 3D object?

• What is the context of the problem?

• Are there any constraints or limitations?

• What tools or programming languages can be used?

Derive a formula to determine how many smaller rectangles fit into a bigger rectangle given their dimensions.

• Calculate the number of times the smaller rectangle can fit into the bigger rectangle horizontally and vertically

• Divide the width of the bigger rectangle by the width of the smaller rectangle to get the horizontal count

• Divide the height of the bigger rectangle by the height of the smaller rectangle to get the ve...read more

At least 4 points are required to draw a rectangle.

• A rectangle has 4 sides and 4 corners, so at least 4 points are needed to define those corners.

• The points must be arranged in a specific order to form a closed shape with 4 sides.

• Additional points can be used to add details or modify the shape of the rectangle.

• The number of points required may vary depending on the software or tool used to draw the rectangle.

Answering how to calculate new coordinates of a scaled rectangle and providing a program for it.

• To calculate new coordinates, multiply the original coordinates by the scaling factor

• Scaling factor can be calculated by dividing the new length/breadth by the original length/breadth

• Program can take input of original coordinates, scaling factor, and output new coordinates

• Example: Original coordinates: (0,0), (0,5), (5,5), (...read more

Quality tools are techniques used to ensure quality in a product or service.

• Quality control charts

• Pareto charts

• Fishbone diagrams

• Histograms

• Control charts

• Scatter diagrams

• Statistical process control

A histogram is used to represent the distribution of numerical data. Frequency is the number of occurrences and interval is the range of values.

• Histograms are useful for visualizing data and identifying patterns.

• Frequency refers to the number of times a value appears in the data set.

• Interval refers to the range of values that are grouped together in the histogram.

• Histograms are commonly used in statistics, finance, and...read more

Rework of produced parts affects the factors of Overall Equipment Efficiency (OEE).

• Rework increases the time required to produce a part, reducing the availability factor of OEE.

• Rework increases the number of defects, reducing the quality factor of OEE.

• Rework increases the amount of scrap or waste, reducing the performance factor of OEE.

• Rework can lead to increased downtime for equipment setup and adjustments, reducing ...read more

Autonomous maintenance is a maintenance approach where operators take responsibility for routine maintenance tasks.

• Operators are trained to perform routine maintenance tasks

• Operators conduct inspections and minor repairs

• Autonomous maintenance reduces downtime and improves equipment reliability

• It also frees up maintenance staff to focus on more complex tasks

Companies are going for TPM to improve productivity, reduce downtime, and increase efficiency.

• TPM helps in identifying and eliminating equipment failures before they occur

• It ensures that equipment is maintained properly and in a timely manner

• TPM also helps in reducing the need for emergency repairs and downtime

• It improves overall equipment effectiveness and reduces costs

• Companies that have implemented TPM have seen sig...read more

SPC stands for Statistical Process Control. Cp and Cpk are statistical tools used to measure process capability.

• SPC is a method of monitoring and controlling a process to ensure it is operating within acceptable limits.

• Cp is a measure of how well the process is centered between the upper and lower specification limits.

• Cpk is a measure of how well the process is capable of producing within the specification limits.

• Cp an...read more

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

• Calculate Availability by dividing Operating Time by Planned Production Time.

• Calculate Performance by dividing Actual Production by Maximum Production.

• Calculate Quality by dividing Good Units by Total Units Produced.

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

Major losses affecting OEE include availability, performance, and quality losses.

• Availability losses occur when equipment is not running due to breakdowns, changeovers, or lack of materials.

• Performance losses occur when equipment is running below its maximum speed or efficiency.

• Quality losses occur when defective products are produced and need to be scrapped or reworked.

• Other losses may include startup and shutdown los...read more

IATF stands for International Automotive Task Force and its current revised name is IATF 16949:2016.

• IATF stands for International Automotive Task Force

• Its current revised name is IATF 16949:2016

A capacitor is an electronic component that stores electrical energy in an electric field. It is used in various electronic circuits.

• Capacitors are used to filter out noise and stabilize voltage in power supplies.

• They are used in timing circuits, oscillators, and filters.

• Capacitors are also used in audio equipment to filter out unwanted frequencies.

• They can be found in electronic devices such as TVs, computers, and sma...read more