100+ System Engineer Hardware Interview Questions and Answers

Counting letter-pairs with same no. of letters left between them in the word SERVANT.

• Identify the letter-pairs in the word SERVANT.

• Count the number of letters between each pair.

• Compare the count with the position of the pair in the word.

• If they match, increment the count of such pairs.

• Answer the total count of such pairs.

List and tuple are both data structures in Python, but they have some differences.

• Lists are mutable, while tuples are immutable.

• Lists use square brackets [], while tuples use parentheses ().

• Lists are typically used for collections of homogeneous items, while tuples are used for heterogeneous items.

• Lists are usually used for sequences that will be modified, while tuples are used for sequences that will not be modified.

• Lists have more built-in methods than tuples.

Explains difference between string object, string literal and string buffer. Also, sorts array and finds pair of numbers.

• String object is an instance of a class, string literal is a sequence of characters enclosed in double quotes, and string buffer is a mutable sequence of characters.

• To sort an array of strings, use Arrays.sort() method.

• To find a pair of numbers in an array that add up to a target value, use a nested loop to compare each element with every other element.

• Exam...read more

Interview questions for Systems Engineer role

• Roles and responsibilities of a Systems Engineer

• Work experiences and technical skills required for the role

• Explanation of Automation Framework used in a project

• Basic concepts of Java programming language

• Understanding of Maps, List, and Sets in Java

• Knowledge of Selenium automation tool

• Understanding of TestNG testing framework

Programming is essential for automating tasks, solving complex problems, and creating innovative technologies.

• Programming is needed to automate repetitive tasks and increase efficiency.

• It is essential for developing software applications, websites, and mobile apps.

• Programming allows for the creation of innovative technologies like artificial intelligence and virtual reality.

• Object-oriented programming (OOP) is a programming paradigm based on the concept of objects, which can ...read more

Data hiding is hiding the implementation details while abstraction is hiding the complexity of the system.

• Data hiding is a technique to hide the implementation details of a class from the outside world.

• Abstraction is a technique to hide the complexity of the system by providing a simplified interface.

• Data hiding is achieved through access modifiers like private, protected, and public.

• Abstraction is achieved through abstract classes and interfaces.

• Data hiding is used to preven...read more

Referential integrity constant ensures that a foreign key value always refers to an existing primary key value.

• It maintains consistency between related tables

• It prevents orphaned records

• It enforces data integrity

• Example: A foreign key in the Orders table refers to the primary key in the Customers table

Selecting 0.95 of the whole dataset helps in training the model on a larger portion of the data while still having enough for testing.

• Using 0.95 of the dataset ensures that the model is trained on a majority of the data, leading to better generalization.

• Having a larger training set can help in capturing more patterns and relationships in the data.

• Reserving 0.05 of the dataset for testing allows for evaluating the model's performance on unseen data.

• This split ratio is commonly...read more

Delete, drop, truncate, and join are SQL commands with different functionalities.

• DELETE: Removes specific rows from a table based on a condition.

• DROP: Deletes an entire table or database object from the database.

• TRUNCATE: Removes all rows from a table, but keeps the table structure.

• JOIN: Combines rows from two or more tables based on a related column between them.

Different types of transformations in Informatica include active and passive transformations, as well as union and joiner transformations.

• Active transformations are those which change the number of rows that pass through them, such as Filter or Router transformations.

• Passive transformations do not change the number of rows that pass through them, such as Expression or Lookup transformations.

• Union transformation combines data from multiple pipelines into a single pipeline.

• Join...read more

Global variables are accessible throughout the program, while local variables are only accessible within a specific function.

• Global variables can be accessed and modified by any function or module in the program.

• Local variables are declared within a specific function and can only be accessed within that function.

• Global variables can cause naming conflicts and make debugging difficult.

• Local variables are preferred for their encapsulation and reduced risk of naming conflicts.

Static variable is a variable that retains its value even after the function execution is completed.

• Static variables are declared inside a function with the keyword 'static'.

• They are initialized only once and retain their value throughout the program.

• They have a default value of 0 if not initialized explicitly.

• They are useful in situations where we need to maintain the state of a variable across function calls.

The most difficult coding problems in the coding round were related to optimizing algorithms and handling complex data structures.

• Optimizing algorithms for efficiency

• Handling complex data structures like trees and graphs

• Implementing dynamic programming solutions

• Dealing with multi-threading and concurrency issues

Explanation of Collection API, ArrayList internal implementation and syntax for HashMap

• Collection API is a set of interfaces and classes that provide a framework for handling groups of objects

• ArrayList is a resizable array implementation of List interface in Collection API

• ArrayList internally uses an array to store the elements and dynamically increases its size as required

• Syntax for HashMap: HashMap map = new HashMap();

The life cycle of a servlet includes initialization, service, and destruction.

• Servlet is initialized by calling its init() method

• Servlet handles client requests in its service() method

• Servlet is destroyed by calling its destroy() method

• Examples of servlet containers include Tomcat and Jetty

Yes, I am familiar with ticketing tools.

• I have experience using JIRA for issue tracking and project management.

• I have also used ServiceNow for IT service management.

• Other ticketing tools I am familiar with include Zendesk and Freshdesk.

• I understand the importance of using ticketing tools to efficiently manage and track issues.

• I am comfortable using ticketing tools to communicate with team members and stakeholders.

Covariance measures the relationship between two variables, correlation measures the strength and direction of a relationship, and multicollinearity occurs when independent variables in a regression model are highly correlated.

• Covariance is a measure of how two variables change together. It can be positive, negative, or zero.

• Correlation is a standardized measure of the strength and direction of the relationship between two variables. It ranges from -1 to 1.

• Multicollinearity i...read more

SCD stands for Slowly Changing Dimensions and lookups in Informatica are used to perform data transformations by looking up data from a reference table.

• SCD is used to track changes to dimension data over time.

• There are three types of SCD - Type 1, Type 2, and Type 3.

• Lookups in Informatica are used to perform data transformations by looking up data from a reference table.

• Lookups can be connected to different types of sources like flat files, databases, etc.

• Example: In a Type 2...read more

A pointer is a variable that stores the memory address of another variable, allowing for direct memory access and manipulation.

• Pointers are declared using the '*' symbol, e.g., 'int *ptr;' declares a pointer to an integer.

• Pointers can be used to dynamically allocate memory using functions like 'malloc()' and 'free()'.

• Example: 'int arr[5]; int *ptr = arr;' makes 'ptr' point to the first element of the array 'arr'.

• Pointers can be dereferenced using the '*' operator to access th...read more

A signal is a physical quantity that varies with time, conveying information. A sine wave is a periodic signal.

• A signal can be electrical, acoustic, or optical.

• Signals can be analog or digital.

• Examples of signals include sound waves, radio waves, and voltage signals.

• A sine wave is a smooth, repetitive oscillation that can be described mathematically.

• It is characterized by its amplitude, frequency, and phase.

Pass statement skips the current iteration and continue statement skips the current iteration and moves to the next one.

• Pass statement is used to do nothing and move to the next iteration in a loop.

• Continue statement is used to skip the current iteration and move to the next one in a loop.

• Pass statement is used when a statement is required syntactically but no action is needed.

• Continue statement is used when a condition is met and the current iteration needs to be skipped.

DELETE is a SQL command used to remove rows from a table.

• DELETE is used with the WHERE clause to specify which rows to remove

• It can also be used with JOIN to delete rows from multiple tables

• The deleted rows can be recovered using the ROLLBACK command

OOP is a programming paradigm based on objects, encapsulating data and behavior for modular and reusable code.

• Encapsulation: Bundling data and methods that operate on the data within one unit (e.g., a class).

• Inheritance: Mechanism to create a new class based on an existing class, inheriting its attributes and methods (e.g., a 'Dog' class inheriting from an 'Animal' class).

• Polymorphism: Ability to present the same interface for different underlying data types (e.g., a function...read more

Inheritance is a fundamental concept in object-oriented programming, allowing classes to inherit properties and methods from other classes.

• Inheritance promotes code reusability, reducing redundancy.

• Example: A 'Vehicle' class can be a parent class for 'Car' and 'Bike' subclasses.

• Subclasses can override methods of the parent class to provide specific functionality.

• Example: A 'Car' class can have a method 'startEngine' that behaves differently than in the 'Vehicle' class.

• Inherit...read more

Learning Python as a newbie

• Start with basic syntax and data types

• Practice coding exercises and challenges

• Read documentation and watch tutorials

• Join online communities and forums for support

• Work on personal projects to apply knowledge

Protractor is a testing framework specifically designed for Angular applications, while Selenium is a more general testing tool for web applications.

• Protractor is built on top of Selenium WebDriver and is optimized for Angular applications

• Protractor has built-in support for Angular-specific locator strategies like ng-model, ng-repeat, etc.

• Selenium is a more versatile tool that can be used for testing any web application, not just Angular ones

Code for infinite loop and prime number check

• For infinite loop: while(1) { //code }

• For prime number check: bool isPrime(int n) { for(int i=2; i<=sqrt(n); i++) { if(n%i == 0) return false; } return true; }

• Infinite loop can be used for continuous monitoring or background tasks

• Prime number check is useful in cryptography and number theory