10+ Lyncis Technologies Interview Questions and Answers

Method, constructor and destructor are all used in object-oriented programming to define and manipulate objects.

• A method is a function that is associated with an object and can be called to perform an action on that object.

• A constructor is a special method that is called when an object is created and is used to initialize the object's properties.

• A destructor is a special method that is called when an object is destroyed and is used to clean up any resources that the object wa...read more

C is preferred over Python in embedded systems due to its low-level control and efficiency.

• C allows for direct memory manipulation and low-level hardware access, which is necessary in embedded systems.

• Python, on the other hand, is a high-level language that requires an interpreter, making it less efficient and slower than C.

• C also has a smaller memory footprint and can be optimized for specific hardware, making it ideal for embedded systems.

• Python is better suited for applica...read more

Program to sort an array of numbers

• Use a sorting algorithm like bubble sort, insertion sort, or quicksort

• Loop through the array and compare adjacent elements to swap them if necessary

• Repeat until the array is sorted in ascending or descending order

Microcontroller is a self-contained system with memory, input/output peripherals and a processor. Microprocessor only has a processor.

• Microcontroller has on-chip memory and peripherals while microprocessor requires external memory and peripherals

• Microcontroller is used in embedded systems while microprocessor is used in personal computers

• Microcontroller is cheaper and consumes less power than microprocessor

• Examples of microcontrollers are Arduino, PIC, and AVR while examples ...read more

Array is a fixed-size data structure while list is a dynamic data structure.

• Arrays have a fixed size while lists can grow or shrink dynamically.

• Arrays store elements of the same data type while lists can store elements of different data types.

• Arrays are accessed using an index while lists are accessed using an iterator.

• Examples of arrays include int[], char[], and boolean[] while examples of lists include ArrayList and LinkedList.

Waterfall model is a linear sequential approach to software development.

• It consists of five stages: Requirements, Design, Implementation, Testing, and Maintenance.

• Each stage must be completed before moving on to the next.

• It is a rigid model and changes cannot be made easily once a stage is completed.

• It is suitable for projects with well-defined requirements and stable technology.

• Example: Developing a calculator app.

Use a sorting algorithm like bubble sort or quicksort to arrange numbers in ascending order.

• Implement a sorting algorithm like bubble sort, selection sort, insertion sort, quicksort, etc.

• For example, in bubble sort, compare adjacent elements and swap them if they are in the wrong order.

• Repeat this process until the array is sorted in ascending order.

Yes, Python has array data structure in it.

• Python has a built-in array module that provides an array() object

• Arrays can be of any type, such as integers, floating-point numbers, and strings

• Arrays are mutable and can be modified using various methods

Encryption is the process of converting plain text into a coded message, while decryption is the process of converting the coded message back into plain text.

• Encryption uses an algorithm to scramble the original message into an unreadable format.

• Decryption uses a key to reverse the encryption process and retrieve the original message.

• Symmetric encryption uses the same key for both encryption and decryption, while asymmetric encryption uses different keys.

• Common encryption tec...read more

Overriding is when a subclass provides a specific implementation of a method that is already provided by its parent class. Overloading is when a class has two or more methods with the same name but different parameters.

• Overriding is used for runtime polymorphism while overloading is used for compile-time polymorphism.

• Overriding can only occur in a subclass while overloading can occur in the same class or its subclass.

• Overriding changes the method behavior while overloading do...read more

Big endian and small endian are two ways of storing multi-byte data in computer memory.

• Big endian stores the most significant byte first and the least significant byte last.

• Small endian stores the least significant byte first and the most significant byte last.

• The choice of endianess affects how data is interpreted and communicated between different systems.

• For example, the IP protocol uses big endian for its header fields, while the x86 architecture uses small endian for its...read more

A program to swap two numbers

• Declare two variables and assign values to them

• Use a third variable to store the value of the first variable

• Assign the value of the second variable to the first variable

• Assign the value of the third variable to the second variable

Program is a set of instructions that performs a specific task. Process is an instance of a program in execution. Thread is a subset of a process.

• Program is a set of instructions written in a programming language.

• Process is an instance of a program in execution. It has its own memory space and system resources.

• Thread is a subset of a process. It is a lightweight process that shares the same memory space and system resources as the parent process.

• Multiple threads can run concu...read more

D flip-flop is a digital circuit that stores a single bit of data and transfers it to the output on the rising edge of the clock signal.

• D flip-flop has a single data input (D) and two outputs (Q and Q').

• The truth table for D flip-flop is: D Q(t) Q(t+1), 0 0 0, 1 1 1.

• The D input is sampled on the rising edge of the clock signal and transferred to the output.

• The Q output is the complement of the Q' output.

• D flip-flop is used in sequential circuits for storing and transferring d...read more

OSI model has 7 layers that define how data is transmitted over a network.

• Layer 1: Physical layer - deals with physical connections and electrical signals.

• Layer 2: Data link layer - responsible for error-free transfer of data between nodes.

• Layer 3: Network layer - handles routing of data packets between networks.

• Layer 4: Transport layer - ensures reliable data transfer between end-to-end connections.

• Layer 5: Session layer - establishes and manages communication sessions betwe...read more

Bootloader is a program that loads and starts the operating system when a computer is turned on.

• Bootloader is the first program that runs when a computer is turned on.

• It is responsible for loading and executing the operating system.

• Bootloader is usually stored in the computer's firmware or on the hard drive.

• It performs hardware checks and initializes the system before loading the OS.

• Examples of bootloaders include GRUB, LILO, and Windows Boot Manager.