Wirecom Interview Questions and Answers

Q1. Write SQL query to return the latest login date for each primary key?
Ans. 
SQL query to return latest login date for each primary key
• Use GROUP BY clause to group by primary key

• Use MAX() function to get the latest login date

• Join the tables if necessary
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Q2. How to find the number of times a number repeats in an array (with less time complexity)?
Ans. 
Use a hashmap to store the frequency of each number in the array.
• Create a hashmap to store the frequency of each number in the array.

• Iterate through the array and update the frequency in the hashmap.

• Retrieve the frequency of the desired number from the hashmap.
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Q3. Validate an array based on a set of rules, with less time complexity.
Ans. 
Use regular expressions to validate array elements efficiently.
• Use regular expressions to define the rules for validation.

• Iterate through the array and apply the regular expression to each element.

• Return true if all elements pass the validation rules, false otherwise.
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Q1. Asked self intro
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Q2. Asked about the projects
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Q3. Explain about the communication serial Protocols like SPI,UART,I2c.
Ans. 
SPI, UART, and I2C are communication serial protocols used in embedded systems to transfer data between devices.
• SPI (Serial Peripheral Interface) is a full-duplex synchronous communication protocol commonly used for communication between microcontrollers and peripheral devices.

• UART (Universal Asynchronous Receiver/Transmitter) is a serial communication protocol that uses two wires for data transmission and is commonly ...read more
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Q4. What is kernel space and any experience in device drivers
Ans. 
Kernel space is a protected area of memory where the core of the operating system resides. Device drivers are software that allows the operating system to communicate with hardware devices.
• Kernel space is a privileged area of memory that is reserved for the core components of the operating system.

• Device drivers are software modules that facilitate communication between the operating system and hardware devices.

• Experien...read more
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Q5. Explain about an os boot up sequence
Ans. 
OS boot up sequence involves several steps such as BIOS initialization, bootloader loading, kernel loading, and initialization of system services.
• BIOS (Basic Input/Output System) initialization

• Bootloader loading (e.g. GRUB, LILO)

• Kernel loading and initialization

• Init process execution

• System services initialization
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Q1. OOPs basics questions like inheritance, smart pointers, diamond problem etc.
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Q2. MFC basic questions like sending data from one window to other, sendmessage post message etc.
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Q1. What does a stress-strain diagram look like?
Ans. 
A stress-strain diagram shows the relationship between stress (force applied) and strain (resulting deformation) in a material.
• The diagram typically starts with a linear elastic region where stress is directly proportional to strain.

• After the elastic limit, the material enters the plastic region where it deforms permanently.

• Finally, the material reaches its ultimate strength before failure occurs.

• Examples of stress-str...read more
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Basic aptitude questions

Q1. Incoterm,PO process,Inventory Management,Pricing,Import export
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Q1. About your experience in last company
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Q1. Salary discussion
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Leadership skills, team spirit, communication skills, problem-solving skills, analytical skills, and decision-making skills.

Q1. Can you tell me about yourself?
Ans. 
I am a dedicated Quality Engineer with a strong background in ensuring product quality and compliance with industry standards.
• Experienced in conducting quality control tests and inspections

• Skilled in identifying and resolving quality issues

• Proficient in using quality management tools and techniques

• Strong attention to detail and analytical skills

• Excellent communication and teamwork abilities
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Q2. What are your strengths and weaknesses?
Ans. 
My strengths include attention to detail, problem-solving skills, and strong communication. My weaknesses include a tendency to overthink and difficulty saying no.
• Strengths: attention to detail

• Strengths: problem-solving skills

• Strengths: strong communication

• Weaknesses: tendency to overthink

• Weaknesses: difficulty saying no
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Q3. Tell me about an experience when you faced difficulty at work while working on a project
Ans. 
I faced difficulty at work while working on a project due to conflicting requirements from different stakeholders.
• Received conflicting feedback from different stakeholders on project requirements

• Struggled to prioritize and balance the needs of each stakeholder

• Had to facilitate meetings and negotiations to reach a consensus

• Implemented a compromise solution that satisfied all parties involved
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The test about the aptitude questions asked normally

Design of system and electrical grid network

Q1. Shut down prosess
Ans. 
Shutting down a process involves terminating a program or application running on a computer system.
• Use task manager or command line to end the process

• Ensure all unsaved work is saved before shutting down

• Consider any dependencies or impact on other processes
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Q2. Breaker and transform se aata hai
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Q3. Shut downprosess
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