Allegion Interview Questions and Answers

Q1. Print the largest string from the given 5 strings
Ans. 
Find the largest string from a given array of 5 strings
• Iterate through the array of strings and compare the length of each string

• Keep track of the largest string found so far

• Return the largest string at the end
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Q2. Check if the required dropdown option is displayed or not
Ans. 
Use Selenium WebDriver to locate the dropdown element and check if the required option is displayed
• Locate the dropdown element using Selenium WebDriver

• Use the Select class to interact with the dropdown

• Verify if the required option is displayed using isSelected() method
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Basic coding questions that are available with just one google search

Q1. What is retain , weak, strong, atomic etc in Objective C
Ans. 
Retain, weak, strong, atomic are property attributes in Objective-C for memory management and thread safety.
• Retain: Increases the reference count of an object.

• Weak: Does not increase the reference count, used to avoid retain cycles.

• Strong: Increases the reference count and keeps the object in memory until all references are removed.

• Atomic: Guarantees that the value is always fully retrieved or set in a multi-threaded e...read more
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Q2. ARC in Objective C
Ans. 
ARC (Automatic Reference Counting) is a memory management feature in Objective-C that automatically manages memory for objects.
• ARC automatically inserts retain, release, and autorelease calls at compile time to manage memory.

• It helps prevent memory leaks and makes memory management easier for developers.

• Example: 'NSString *name = [[NSString alloc] initWithString:@"John"];' - ARC will automatically handle memory managem...read more
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Q1. Explain the testing project in your current company
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Q1. Given a collection with key, value pair with key being a string and value being an integer, sort the collection based on values.
Ans. 
Sort a collection of key-value pairs by their integer values in ascending order.
• Use a sorting algorithm like quicksort or mergesort.

• In Python, use the sorted() function with a custom key: sorted(collection, key=lambda x: x[1]).

• Example: For {'a': 3, 'b': 1, 'c': 2}, the sorted result is [('b', 1), ('c', 2), ('a', 3)].

• In JavaScript, use array.sort() with a compare function: collection.sort((a, b) => a[1] - b[1]).
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Q2. What is a BDD approach
Ans. 
BDD (Behavior-Driven Development) is an agile software development process that encourages collaboration between developers, QA, and non-technical stakeholders.
• Focuses on defining the behavior of a system through examples in plain language

• Uses scenarios written in a specific format (Given-When-Then) to describe the expected behavior

• Promotes communication and understanding between team members

• Helps ensure that the softw...read more
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Q3. Write a program to print reverse triangle of odd numbers
Ans. 
Program to print reverse triangle of odd numbers
• Start by determining the number of rows in the triangle

• Use nested loops to print odd numbers in reverse order for each row

• Adjust spacing to create the triangle shape
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Q1. Question related to roles and responsibility and project management.
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Q2. KPIs for junior and senior team member
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Q3. How do you handle conflicts within team members?
Ans. 
I handle conflicts within team members by promoting open communication, active listening, and facilitating resolution.
• Encourage open communication to understand the root cause of conflicts

• Practice active listening to ensure all team members feel heard and understood

• Facilitate resolution by mediating discussions and finding common ground

• Promote a collaborative and respectful team culture

• Provide coaching or training on c...read more
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Q1. Question related to People Management, Project Management, Scrum and Agile
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Q2. Why are you looking for change?(asked in very details)
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Q1. Salary Expectation and Discussion.
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Q1. Reverse a string
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There were few verbal questions, many questions on electronics basics(op amps, network analysis), embedded c, few general aptitudes questions. Overall it was moderately difficult. EEE and ECE had technical questions under two categories i.e. electrical and electronics . Based on each categories students were shortlisted under firmware and hardware.

Group discussion was good. The topic our group got was "Is India ready for electrical vehicles". There were about 10 students in one group.

Q1. Tell me about yourself ?
Ans. 
I am a firmware engineer with experience in developing embedded systems and writing low-level code.
• I have a strong background in C and C++ programming languages.

• I have worked on various microcontrollers and embedded platforms such as Arduino, Raspberry Pi, and STM32.

• I am experienced in developing device drivers, communication protocols, and firmware for IoT devices.

• I have a good understanding of hardware-software inter...read more
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Q2. Questions on projects
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Q3. Difference between diode and Zener diode
Ans. 
A diode is a two-terminal electronic component that allows current to flow in one direction, while a Zener diode is a special type of diode that allows current to flow in reverse direction when a certain voltage is reached.
• Diodes are used for rectification, signal demodulation, and voltage regulation.

• Zener diodes are used for voltage regulation and protection against voltage spikes.

• Diodes have a forward voltage drop, w...read more
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Q4. Draw bjt and mosfet model
Ans. 
BJT and MOSFET are models used to represent transistors in electronic circuits.
• BJT stands for Bipolar Junction Transistor and has three regions: emitter, base, and collector.

• MOSFET stands for Metal Oxide Semiconductor Field Effect Transistor and has three terminals: source, gate, and drain.

• BJT is a current-controlled device while MOSFET is a voltage-controlled device.

• BJT has a low input impedance while MOSFET has a hig...read more
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Q5. Different communication protocols
Ans. 
Communication protocols are sets of rules that govern the exchange of data between devices.
• Some common communication protocols include UART, SPI, I2C, CAN, Ethernet, and USB.

• Each protocol has its own advantages and disadvantages, and is suited for different types of applications.

• For example, UART is a simple protocol commonly used for serial communication between microcontrollers and sensors, while Ethernet is a more c...read more
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Q6. Questions on RAM and ROM
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