Cognizant Unix Administrator Interview Questions and Answers

Unix assignment cleared

Q1. Technical interview all done
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Q1. Given UI task display like display boxes side by side in desktop screen and one after the other in mobile screen using media queries?
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Q2. Explain difference between authorization vs authentication?
Ans. 
Authentication verifies a user's identity, while authorization determines what a user can access.
• Authentication confirms a user's identity through credentials like username and password.

• Authorization controls access to resources based on the authenticated user's permissions.

• Example: Logging into a website (authentication) and then being able to view/edit specific pages based on your role (authorization).
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Q3. How to render list in react? Also explain difference between state vs prop in react?
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To render a list in React, use map() function to iterate over an array of data and return a list of components. State is mutable data managed within a component, while props are immutable data passed from parent to child components.
• To render a list in React, use map() function to iterate over an array of data and return a list of components.

• Example: const items = ['item1', 'item2', 'item3']; items.map(item =>

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Q1. What are the webpage optimization techniques? How to check webpage optimization? In lighthouse optimization reports , how to fix issue related render blocking scripts?
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Webpage optimization techniques include minifying CSS and JS files, optimizing images, using asynchronous loading for scripts, and reducing render-blocking scripts.
• Minify CSS and JS files to reduce file sizes and improve loading times.

• Optimize images by compressing them and using the correct file format (e.g. JPEG for photographs, PNG for graphics).

• Use asynchronous loading for scripts to prevent them from blocking the ...read more
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Q2. Write scss code nested li element by applying background color 2 element and also use mixins?
Ans. 
Use SCSS to apply background color to nested li elements and utilize mixins.
• Use nesting to target the li elements within a parent element

• Apply background color to the 2nd li element using the :nth-child() selector

• Define and use mixins to reuse styles across the codebase
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Q3. How to fix cumulative layout shift issues?
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To fix cumulative layout shift issues, ensure all images and media have dimensions specified in HTML, use CSS aspect ratio boxes, and prioritize loading critical resources.
• Specify dimensions for all images and media in HTML to prevent layout shifts.

• Use CSS aspect ratio boxes to reserve space for images before they load.

• Prioritize loading critical resources to avoid sudden layout changes.
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Q1. Explain about patch management in Linux
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Q2. After patching what are the issues you faced. How did you troubleshoot those issues.
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Q1. What is Linux and which flavor you've worked on?
Ans. 
Linux is an open-source operating system based on Unix, known for its stability, security, and flexibility.
• Linux is an open-source operating system that is widely used in servers, supercomputers, and embedded systems.

• There are many flavors of Linux, known as distributions, such as Ubuntu, CentOS, Debian, and Red Hat.

• Each Linux distribution has its own package management system, desktop environment, and software reposit...read more
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Q2. What is roles and responsibilities as a system admin
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Q1. Salary expectations
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Q2. How fast you can join
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Q1. Justify position
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Senior System Administrator position requires advanced technical skills and experience in managing complex IT systems.
• Extensive experience in managing and troubleshooting complex IT systems

• Advanced knowledge of network infrastructure and security protocols

• Proven track record of implementing and maintaining system backups and disaster recovery plans

• Strong communication and problem-solving skills

• Ability to work well unde
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Q2. Quick troubleshooting for admins like SCCM, AD and Azure
Ans. 
Quick troubleshooting tips for SCCM, AD, and Azure
• Check event logs for errors or warnings

• Verify network connectivity

• Restart services related to the issue

• Check permissions and group memberships

• Review SCCM logs for client issues

• Use Azure Resource Health for Azure service status

• Check AD replication status
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Q1. What are your expectations
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Q1. Tell me about yourself
Ans. My name is sumanth I'm from eluru and my graduation B. Tech mechanical from JNTUK university
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Q2. What is your strength and Weekness
Ans. My strength - creativity, flexibility, focused My weekends -hard skills, saying no and shy
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Q3. Why should we hire u
Ans. Because I'm hard worker who wants to help your company succeed
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Q1. How to scheduled cron job
Ans. 
To schedule a cron job, use the crontab command to edit the cron table file.
• Use the crontab -e command to open the cron table file for editing

• Add a new line to the file with the schedule timing and the command to be executed

• Save and exit the file to schedule the cron job
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Q1. What is sticky bit
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Sticky bit is a permission in Unix/Linux that allows only the owner of a file to delete or rename it.
• Sticky bit is represented by a 't' in the permissions of a file or directory.

• When the sticky bit is set on a directory, only the owner of a file within that directory can delete or rename the file.

• Commonly used on directories like /tmp to prevent users from deleting each other's files.

• Example: chmod +t directory_name
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Q1. Tell me about yourself and salary discussion
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