Comcast India Engineering Center Data Engineer Interview Questions and Answers

No, as a software engineer, you may not have the necessary experience or skills to work as an IT manager.

• Software engineers typically focus on coding and technical aspects, while IT managers are responsible for overseeing projects, teams, and budgets.

• IT managers need strong leadership, communication, and decision-making skills, which may not be the primary focus of a software engineer.

• Consider gaining experience in pro...read more

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

• OSI stands for Open Systems Interconnection

• Each layer has a specific function and communicates with adjacent layers

• Layers are: Physical, Data Link, Network, Transport, Session, Presentation, Application

A router is needed to connect two computers in different networks or to share internet connection.

• When two computers are in different networks, a router is needed to connect them.

• A router can also be used to share internet connection between multiple devices.

• Routers can provide additional security features like firewall and VPN.

• Examples of routers include Cisco, Netgear, and TP-Link.

IPv4 has 32 bits and IPv6 has 128 bits.

• IPv4 addresses are in the format of xxx.xxx.xxx.xxx where each xxx is an 8-bit number.

• IPv6 addresses are in the format of xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx where each xxxx is a 16-bit number.

• IPv6 addresses allow for a much larger number of unique addresses than IPv4.

IPv6 is needed due to the exhaustion of IPv4 addresses and the need for more unique IP addresses.

• IPv6 provides a significantly larger address space compared to IPv4.

• It allows for the allocation of unique IP addresses to every device connected to the internet.

• IPv6 supports improved security features and better network performance.

• It enables the growth of Internet of Things (IoT) devices and services.

• Transitioning to IPv...read more

A /24 address can have 256 clients. Network address is the first IP and broadcast address is the last IP.

• A /24 address has 256 IP addresses

• The network address is the first IP in the range

• The broadcast address is the last IP in the range

Anycast, unicast, and multicast are different ways of routing network traffic.

• Unicast is one-to-one communication between a sender and a receiver.

• Anycast is one-to-nearest communication where the sender sends a message to the nearest receiver.

• Multicast is one-to-many communication where the sender sends a message to a group of receivers.

• Anycast is used for load balancing and finding the nearest server.

• Unicast is used f...read more

Virtual memory is a memory management technique that allows a computer to use more memory than physically available.

• Virtual memory is created by using hard disk space as an extension of RAM.

• It allows running more programs than the physical memory can handle.

• The size of virtual memory is typically larger than the size of main memory.

• Virtual memory is divided into pages, which are swapped in and out of main memory as nee...read more

I rate myself 8 in C and 7 in web technologies.

• I have extensive experience in C programming and have worked on multiple projects using it.

• In web technologies, I have a good understanding of HTML, CSS, and JavaScript, but there is always room for improvement.

• I am constantly learning and improving my skills in both areas.

My strengths include problem-solving skills, attention to detail, and strong programming abilities.

• Strong problem-solving skills - able to analyze complex problems and come up with effective solutions

• Attention to detail - meticulous in writing code and ensuring it is error-free

• Strong programming abilities - proficient in multiple programming languages such as Java, Python, and C++

A generic swap function swaps two values of any data type.

• The function should take two parameters of any data type.

• Use a temporary variable to store the value of one parameter.

• Assign the value of the second parameter to the first parameter.

• Assign the value of the temporary variable to the second parameter.

Search for an element in a rotated sorted linked list.

• Find the pivot point where the list is rotated.

• Divide the list into two sublists based on the pivot point.

• Perform binary search on the appropriate sublist.

• Handle edge cases such as empty list and list with only one element.

Search an element in a rotated sorted array

• Find the pivot point where the array is rotated

• Divide the array into two sub-arrays based on pivot point

• Perform binary search on the appropriate sub-array

• Repeat until element is found or sub-array size is 1

Find 5 missing numbers in an array of size 95 containing numbers in range 1 to 100.

• Create a boolean array of size 100 and mark the present numbers

• Iterate through the boolean array and find the missing numbers

• Alternatively, use a HashSet to store the present numbers and find the missing ones

Given a Sudoku board, find possible numbers for an empty cell.

• Iterate through empty cells and check possible numbers using row, column, and box constraints.

• Use a set to keep track of possible numbers for each empty cell.

• Return the set of possible numbers for the given empty cell.

Find integer average of 4 unsigned integers without typecasting

• Add all the integers and divide by 4

• Use bit shifting to divide by 4

• Handle overflow by using long long data type

• Use unsigned int data type for input

Code to identify 32 bit or 64 bit architecture of a processor

• Check if the operating system is 32 bit or 64 bit

• If OS is 32 bit, processor is 32 bit

• If OS is 64 bit, check if processor supports 64 bit architecture

• Use CPUID instruction to check if processor supports 64 bit architecture

Convert binary number to base 64 integer

• Divide the binary number into groups of 6 bits

• Convert each group of 6 bits to decimal

• Map the decimal value to the corresponding base 64 character

• Concatenate the base 64 characters to form the final integer

I have the skills, experience, and passion to excel in this role.

• I have a strong background in software development, with experience in multiple programming languages and frameworks.

• I am a quick learner and enjoy tackling new challenges.

• I am a team player and enjoy collaborating with others to achieve common goals.

• I am passionate about software engineering and am always looking for ways to improve my skills and knowled...read more

I chose your company because of its reputation for innovation and its commitment to employee growth.

• Your company has a strong reputation for innovation in the industry.

• I was impressed by the emphasis on employee growth and development.

• I believe that your company's values align with my own personal values.

• I was excited about the opportunity to work with a talented team of engineers.

• Your company's mission and vision reso