400+ Senior Systems Engineer Interview Questions and Answers

Exceptions are errors that occur during program execution. We can handle them using try-catch blocks.

• Exceptions are thrown when an error occurs during program execution

• We can handle exceptions using try-catch blocks

• The try block contains the code that might throw an exception

• The catch block contains the code that handles the exception

• We can also use finally block to execute code regardless of whether an exception was thrown or not

Constructor is used to initialize an object while destructor is used to destroy an object.

• Constructor is called when an object is created and can take arguments to initialize the object's state.

• Destructor is called when an object is destroyed and is used to free up any resources allocated by the object.

• Constructor has the same name as the class while destructor has the same name as the class preceded by a tilde (~).

• Example: class Car { public: Car(string make, string model) {...read more

Polymorphism is the ability of an object to take on many forms, while inheritance is the process of creating new classes from existing ones.

• Polymorphism allows objects of different classes to be treated as if they were of the same class.

• Inheritance allows a new class to be based on an existing class, inheriting its properties and methods.

• Polymorphism is achieved through method overriding and method overloading.

• Inheritance is achieved through the use of keywords like 'extends'...read more

Enable SSO for SaaS applications by integrating with identity providers and configuring authentication protocols.

• Integrate with identity providers such as Okta, Azure AD, or Google Workspace

• Configure authentication protocols like SAML, OAuth, or OpenID Connect

• Implement single sign-on functionality in the application code

• Ensure secure communication between the application and the identity provider

Different types of hardware can be accessed on console through device drivers and APIs.

• Use device drivers to communicate with hardware components such as printers, scanners, and network cards

• Utilize APIs provided by hardware manufacturers to access specific functionalities of hardware devices

• Interact with hardware through command line tools or graphical user interfaces

Troubleshoot Mac display projection issues to a big screen using various methods.

• Check the cable connections: Ensure HDMI or DisplayPort cables are securely connected to both the Mac and the display.

• Use the 'Detect Displays' option: Go to System Preferences > Displays and click 'Detect Displays' to refresh the connection.

• Adjust display settings: In System Preferences > Displays, ensure the correct resolution and display arrangement are set.

• Try a different port or cable: If po...read more

Program to count the number of overs in a string

• Define an over as 6 consecutive balls

• Loop through the string and count the number of overs

• Handle incomplete overs at the end of the string

Appium is the framework used for mobile automation

• Appium is an open-source tool for automating native, mobile web, and hybrid applications on iOS and Android platforms

• It uses the WebDriver protocol to drive iOS and Android apps

• Supports multiple programming languages like Java, Python, Ruby, etc.

• Can run tests on simulators/emulators as well as real devices

Static block initializes static data members. Exception tree is a hierarchy of exceptions. Lambda is a functional interface.

• Static block is used to initialize static data members before the class is loaded.

• Exception tree is a hierarchy of exceptions where each exception is a subclass of Throwable.

• Lambda is a functional interface that allows the use of functional programming concepts in Java.

• Lambda expressions are used to implement functional interfaces.

• Lambda expressions can ...read more

Implementing design as modern technology involves incorporating user-centered design principles, agile methodologies, and cutting-edge tools and technologies.

• Utilize user-centered design principles to ensure the end product meets the needs and expectations of users.

• Adopt agile methodologies to iterate quickly, gather feedback, and make continuous improvements.

• Leverage cutting-edge tools and technologies such as cloud computing, artificial intelligence, and Internet of Things ...read more

Supporting application for SSO enablement involves configuring authentication settings, integrating with identity providers, and testing functionality.

• Configure authentication settings within the application to enable SSO

• Integrate the application with identity providers such as Okta, Azure AD, or PingFederate

• Test the SSO functionality to ensure seamless user experience

• Provide documentation and training for users on how to use SSO with the application

I have extensive experience in Spring Boot and am able to work 5 days a week in the office.

• Extensive experience in developing applications using Spring Boot framework

• Proficient in creating RESTful web services and microservices

• Familiar with Spring Boot features like auto-configuration, embedded servers, and Spring Boot Actuator

• Comfortable working in a team environment and collaborating with other developers

• Yes, I can work 5 days a week in the office

Exception handling is a programming concept where errors or exceptional events are dealt with in a structured manner.

• Exception handling allows for graceful handling of errors in a program.

• It involves using try, catch, and finally blocks to manage exceptions.

• Examples include catching divide by zero errors or file not found exceptions.

To add validation, scenario-based web API, and content negotiation, utilize frameworks like ASP.NET Core and tools like Swagger.

• Use ASP.NET Core for building web APIs with built-in validation features.

• Implement scenario-based testing using tools like Postman or Swagger to simulate different user interactions.

• Utilize content negotiation to allow clients to request data in different formats (e.g. JSON, XML) based on their preferences.

JavaScript is a versatile programming language known for its ability to run on the client side of web applications.

• JavaScript is a high-level, interpreted language that allows for dynamic, client-side scripting on web pages.

• It is versatile and can be used for a wide range of applications, from simple web development to complex server-side programming.

• JavaScript has a large and active community, with a vast array of libraries and frameworks available for developers to use.

• One ...read more

Assess the situation, gather information, and implement a rollback to restore system functionality quickly.

• Assess the impact: Determine which systems are affected and the severity of the crash.

• Gather logs: Check system logs and error messages to identify what changes caused the crash.

• Communicate: Inform stakeholders about the issue and the steps being taken to resolve it.

• Rollback changes: If possible, revert to the last stable configuration or version to restore functionality...read more

The latest OS on iPhones and iPads is iOS 14.

• iOS 14 was released on September 16, 2020.

• It introduced new features like App Library, Widgets, and Picture-in-Picture.

• iOS 14.5, a major update, added support for Face ID with masks and App Tracking Transparency.

• iOS 14.6 and iOS 14.7 brought bug fixes and performance improvements.

• iOS 15 is the upcoming OS version for iPhones and iPads.

The Windows machine is not connecting to the wireless network.

• Check if the wireless adapter is enabled and functioning properly.

• Verify if the correct wireless network is selected and the password is entered correctly.

• Ensure that the wireless signal is strong enough and not blocked by obstacles.

• Restart the wireless router and the Windows machine.

• Update the wireless adapter driver.

• Reset the TCP/IP stack and renew the IP address.

• Disable any third-party antivirus or firewall soft...read more

IPC is Inter-Process Communication used for communication between processes. NAND and NOR Flash are types of non-volatile memory. Semaphore and mutex are synchronization mechanisms.

• IPC allows processes to communicate with each other and share resources.

• NAND Flash is faster and cheaper than NOR Flash, but has limited write cycles. NOR Flash is slower and more expensive, but has more write cycles.

• Semaphore is used to control access to a shared resource, while mutex is used to e...read more

To configure a printer, you need to connect it to the network, install drivers, and set it up on your computer. There are different types of servers for Outlook such as Exchange Server and IMAP/POP servers.

• Connect the printer to the network using Ethernet or Wi-Fi

• Install the printer drivers on your computer

• Set up the printer on your computer by adding it as a new printer

• For Outlook, there are servers like Exchange Server for Microsoft Outlook and IMAP/POP servers for other em...read more

ConcurrentHashMap is a thread-safe implementation of the Map interface in Java.

• ConcurrentHashMap allows multiple threads to read and write to the map concurrently without the need for external synchronization.

• It achieves thread-safety by dividing the map into segments, each of which can be locked independently.

• ConcurrentHashMap uses a combination of synchronized blocks and volatile variables to ensure thread-safety.

• It provides better performance than Hashtable by allowing con...read more

SMARTFORMS and Adobe forms are tools used for creating and managing electronic forms.

• SMARTFORMS is a tool provided by SAP for creating and managing electronic forms in SAP systems.

• Adobe forms is a tool provided by Adobe for creating and managing electronic forms that can be used in various systems.

• Both tools allow for the creation of dynamic forms that can be filled out electronically and submitted.

• SMARTFORMS and Adobe forms can be used in various industries for different pur...read more

Answering questions on interface, abstract class, hashmap, and caching implementation in Hibernate.

• Interface is a blueprint for classes to implement while abstract class can have implemented methods.

• HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values.

• Caching in Hibernate involves storing frequently accessed data in memory to improve performance.

• Hibernate provides two levels of caching: first-level cache and second-level cache.

• First-leve...read more

To register a sling servlet in AEM, you need to create a Java class that extends SlingAllMethodsServlet and annotate it with @SlingServlet. To call a workflow inside another workflow, you can use the WorkflowSession API. To call an OSGi service in another OSGi service class, you can use the @Reference annotation.

• Create a Java class that extends SlingAllMethodsServlet and annotate it with @SlingServlet to register a sling servlet in AEM

• Use the WorkflowSession API to call a wor...read more

Cognizant is a multinational technology company providing IT services, consulting, and business process outsourcing.

• Cognizant is headquartered in the United States.

• It was founded in 1994.

• The company offers services in areas such as digital technology, consulting, and operations.

• Cognizant has a global presence with offices in multiple countries.

• It is known for its expertise in areas like cloud computing, data analytics, and artificial intelligence.

The general structure of IT involves various components and work knowledge.

• IT infrastructure includes hardware, software, networks, and data centers.

• Work knowledge includes understanding operating systems, programming languages, and databases.

• IT teams collaborate to design, implement, and maintain systems and networks.

• Examples of work knowledge include proficiency in Linux, Java, and SQL.

• IT professionals often specialize in areas like network administration, cybersecurity, or...read more

The OSI Model is a conceptual framework that standardizes the functions of a communication system into seven layers.

• The OSI Model stands for Open Systems Interconnection Model.

• It was developed by the International Organization for Standardization (ISO) in the 1980s.

• The model divides the communication process into seven layers, each with its own specific functions.

• The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer interac...read more