Hitachi Technical Support Engineer 2 Interview Questions and Answers

I have done several projects both for curriculum and out of interest.

• Developed a web application for a college project using HTML, CSS, and JavaScript.

• Created a mobile app for tracking expenses using React Native out of interest.

• Built a chatbot using Python for a hackathon project.

• Developed a website for a local business using WordPress for a freelance project.

• Created a game using Unity for a personal project.

My favorite subjects are computer science, mathematics, and physics.

• Computer Science: I enjoy programming and learning about algorithms and data structures.

• Mathematics: I find solving complex problems and equations very satisfying.

• Physics: I am fascinated by the laws of nature and how they govern the universe.

The 8051 micro-controller consists of CPU, RAM, ROM, Timers, Serial Port, Interrupts, and I/O ports.

• The CPU is the main processing unit of the micro-controller.

• The RAM is used for storing data temporarily.

• The ROM contains the program code that is executed by the CPU.

• The Timers are used for generating precise time delays.

• The Serial Port is used for communication with other devices.

• The Interrupts are used for handling ex...read more

Microprocessors are general-purpose CPUs while microcontrollers are designed for specific tasks.

• Microprocessors are used in computers, smartphones, and other devices that require complex processing.

• Microcontrollers are used in embedded systems, such as home appliances, automotive systems, and medical devices.

• Microprocessors have separate memory and I/O interfaces while microcontrollers have them integrated on a single ...read more

Von Neumann and Harvard are computer architecture classifications. 8051 belongs to Harvard architecture.

• Von Neumann architecture has a single memory space for data and instructions, while Harvard architecture has separate memory spaces for data and instructions.

• 8051 microcontroller uses Harvard architecture as it has separate memory spaces for program instructions and data.

• Harvard architecture allows simultaneous acces...read more

Interrupts are signals that temporarily halt the execution of a program to handle a specific event.

• When an interrupt occurs in 8051, the program counter is saved on the stack and the interrupt service routine (ISR) is executed.

• The ISR handles the interrupt and then returns control to the main program by restoring the program counter from the stack.

• If an interrupt occurs while another interrupt is being serviced, the se...read more

The location of current line of execution is stored in the stack when there is an interrupt.

• When an interrupt occurs, the processor saves the current state of execution on the stack.

• The location of the current line of execution is stored in the program counter (PC) register.

• The PC register is pushed onto the stack along with other registers.

• After the interrupt is serviced, the processor pops the saved state from the st

Logic gates are basic building blocks of digital circuits. They perform logical operations on inputs to produce outputs.

• AND gate: output is 1 only if both inputs are 1

• OR gate: output is 1 if either input is 1

• NOT gate: output is the opposite of the input

• NAND gate: output is 0 only if both inputs are 1

• NOR gate: output is 0 if either input is 1

• XOR gate: output is 1 if inputs are different

• XNOR gate: output is 1 if inputs a

Draw half adder and full adder without using EXOR gate.

• Half adder can be implemented using AND and OR gates

• Full adder can be implemented using two half adders and an OR gate

• In half adder, sum is obtained by ORing two inputs and carry is obtained by ANDing two inputs

• In full adder, sum is obtained by using two half adders and an OR gate, and carry is obtained by ANDing three inputs

Remove spaces from input string and return output string

• Iterate through each character of the input string

• If the character is not a space, add it to the output string

• Return the output string

I am a software engineer with experience in developing web applications and a passion for learning new technologies.

• Graduated with a degree in Computer Science

• Proficient in programming languages such as Java, Python, and JavaScript

• Experience in developing web applications using frameworks like React and Angular

• Passionate about learning new technologies and keeping up with industry trends

My father is a businessman and my mother is a homemaker.

• My father runs a small business in our hometown.

• My mother takes care of the household and our family.

• My parents have always been supportive of my education and career goals.

Bosch is a renowned company with a strong focus on innovation and sustainability.

• Bosch has a reputation for being a leader in innovation and technology.

• The company has a strong commitment to sustainability and social responsibility.

• Bosch offers a diverse range of products and services, providing opportunities for growth and development.

• The company has a global presence, offering the chance to work with people from diff

I understood the main points of the presentation.

• The presentation covered the new software development process.

• It emphasized the importance of collaboration between teams.

• It also highlighted the need for continuous testing and feedback.

• I learned about the new tools and technologies that will be used.

• Overall, I found the presentation informative and useful.

I plan to pursue higher studies in computer science to enhance my skills and knowledge.

• I am interested in pursuing a Master's degree in Computer Science.

• I am also considering taking online courses to learn new technologies and programming languages.

• I plan to attend workshops and conferences to stay updated with the latest trends in the industry.

• I believe that continuous learning is essential to stay competitive in the

Implement stack data structure

• Use an array or linked list to store elements

• Push operation adds element to top of stack

• Pop operation removes element from top of stack

• Peek operation returns top element without removing it

Global variables are accessible from any part of the program and can be modified by any function.

• Global variables are declared outside of any function.

• They can be accessed and modified by any function in the program.

• If a function modifies the value of a global variable, the new value is visible to all other functions.

• Global variables can be useful for sharing data between functions.

• However, overuse of global variables

Program to transpose a matrix

• Iterate through rows and columns of the matrix

• Swap the elements at (i,j) and (j,i) positions

• Return the transposed matrix

Pre and post fix operators are used to increment or decrement a value before or after it is used in an expression.

• Pre-fix operator (++x) increments the value of x and returns the new value.

• Post-fix operator (x++) returns the value of x and then increments it.

• Both operators can be used with variables of numeric data types.

• They can also be used with pointers to increment or decrement the memory address they point to.