Cognizant Junior System Administrator Interview Questions and Answers

Q1. How ls command works?
Ans. 
ls command is used to list files and directories in a directory.
• ls command stands for 'list'.

• It displays the names of files and directories in the current directory by default.

• Options can be used with ls command to customize the output, such as -l for long listing format or -a to show hidden files.

• Example: 'ls -l' will display files and directories in long listing format.
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Q2. How DNS works ?
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DNS translates domain names to IP addresses to locate resources on the internet.
• DNS servers store records mapping domain names to IP addresses

• When a user enters a domain name, their device queries a DNS server to resolve it

• DNS uses a hierarchical system with top-level domains like .com or .org
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I dont remember it exactly now

Q1. What do you know about Itil process?
Ans. 
ITIL (Information Technology Infrastructure Library) is a set of best practices for IT service management.
• ITIL is a framework that outlines best practices for IT service management.

• It focuses on aligning IT services with the needs of the business.

• ITIL processes include incident management, change management, problem management, and more.

• ITIL helps organizations improve efficiency, reduce costs, and provide better servi...read more
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Q1. Tell me about your college project
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Q1. Tech round of interview
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Q1. Technical rpund of interview
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Q1. General abou project details
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Q1. Spring vs SpringBoot
Ans. 
Spring is a framework for building Java applications, while Spring Boot is a tool that simplifies the setup and configuration of Spring applications.
• Spring is a comprehensive framework that provides various modules for different functionalities like dependency injection, aspect-oriented programming, etc.

• Spring Boot is an opinionated tool that aims to simplify the setup and configuration of Spring applications by provid...read more
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Q2. Singleton Class
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Reasoning arthemetic

Basic coding skills technical questions

Learn some coding language like python and Java
And SAP ABAP

Q1. What is the use of static word in java
Ans. 
Static keyword in Java is used to create class-level variables and methods.
• Static variables and methods belong to the class rather than the instance of the class.

• Static variables are initialized only once at the start of the program.

• Static methods can be called without creating an instance of the class.

• Static keyword can also be used to create static blocks that are executed only once when the class is loaded.

• Example: ...read more
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Q2. Can we implement multiple interfaces in a single Java class?
Ans. 
Yes, Java supports multiple interface implementation in a single class.
• A class can implement multiple interfaces separated by a comma.

• All the methods of the implemented interfaces must be implemented in the class.

• Example: public class MyClass implements Interface1, Interface2 { }
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Q3. What is the “Diamond problem” in Java?
Ans. 
Diamond problem is a multiple inheritance issue in Java where two classes have a common parent class and a subclass inherits from both.
• Occurs when two classes have a common parent class and a subclass inherits from both

• Results in ambiguity and conflicts in method and variable resolution

• Solved in Java by implementing interfaces instead of multiple inheritance
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Q1. My name is ganesh iam from Dilsukhnagar chaitynapure panigiri colony
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Q2. Iam complete graduation bsc computer science 2020
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Q1. Active directory
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Q2. Windows servers
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Q3. Powershell scripts
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Q4. Performance troubleshooting
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