Integra Micro Systems Interview Questions, Process, and Tips

Q1. String program question like occurance of every character , reverse a sentence
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Q2. Comparable and comparator
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Q3. Array list implementation
Ans. 
Array list implementation involves creating a dynamic list that can grow or shrink in size.
• Use ArrayList class in Java to create an array list of strings.

• ArrayList<String> list = new ArrayList<>();

• Add elements to the list using list.add() method.

• list.add("Apple");

• Access elements using list.get() method.

• String fruit = list.get(0);

• Remove elements using list.remove() method.

• list.remove(0);
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Q4. Oops concepts from what is class to multi threading
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Object-oriented programming concepts from class to multi-threading in Android development.
• Class: blueprint for creating objects, encapsulates data and behavior (methods)

• Inheritance: allows a class to inherit properties and methods from another class

• Polymorphism: ability for objects to take on multiple forms

• Abstraction: hiding implementation details and showing only necessary features

• Encapsulation: bundling data and met...read more
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They give 25 applitude and 24 java mcq and one program from collection

Q1. What is the GRUB process, and how can I check disk space?
Ans. 
GRUB is a bootloader for Linux systems, managing the boot process and allowing OS selection.
• GRUB stands for Grand Unified Bootloader, responsible for loading the operating system.

• It allows users to select between multiple operating systems at boot time.

• GRUB configuration files are typically located in /boot/grub/ or /etc/grub.d/.

• To check disk space, use the command 'df -h' for human-readable output.

• The 'du -sh /path/to...read more
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Q2. What is Nginx, and how can I configure logging for it?
Ans. 
Nginx is a high-performance web server and reverse proxy server known for its speed and efficiency.
• Nginx can be configured to log requests and errors using the 'access_log' and 'error_log' directives.

• Access logs can be customized with different formats using the 'log_format' directive.

• Example of access log configuration: 'access_log /var/log/nginx/access.log;'.

• Example of error log configuration: 'error_log /var/log/ngi...read more
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Q3. What is Apache Tomcat and how is it used?
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Apache Tomcat is an open-source web server and servlet container for running Java applications.
• Developed by the Apache Software Foundation.

• Primarily used to serve Java Servlets and JSP (JavaServer Pages).

• Supports various Java EE specifications, including Servlet and JSP.

• Can be integrated with other web servers like Apache HTTP Server.

• Commonly used in enterprise applications for web-based services.
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Q4. What is the process for downloading a file from a Linux server to a local system?
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Q5. How do you establish an SSH connection between two Linux servers?
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Q6. What is the default port for MySQL and SSH services?
Ans. 
MySQL uses port 3306, while SSH operates on port 22 by default for secure remote access.
• MySQL default port: 3306 - used for database connections.

• SSH default port: 22 - used for secure shell access.

• Both ports can be changed in configuration files if needed.

• Example: MySQL config file (my.cnf) can specify a different port.

• Example: SSH config file (sshd_config) can also specify a different port.
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Q7. What is a zombie process in computing?
Ans. 
A zombie process is a terminated process that still has an entry in the process table, waiting for its parent to read its exit status.
• Zombie processes occur when a child process has completed execution but its parent process hasn't read its exit status.

• They are created when a process terminates, but the parent process has not yet called wait() to collect the exit status.

• Zombie processes consume system resources, but th...read more
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Q8. What are the firewall rules used in Linux?
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Linux firewall rules control network traffic using tools like iptables and firewalld, enhancing system security.
• Iptables: A user-space utility that allows a system administrator to configure the IP packet filter rules of the Linux kernel.

• Example: 'iptables -A INPUT -p tcp --dport 22 -j ACCEPT' allows SSH traffic.

• Firewalld: A dynamic firewall management tool that supports zones and services.

• Example: 'firewall-cmd --zone...read more
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Q9. What are the top 10 command-line commands in Linux?
Ans. 
Top 10 Linux command-line commands for system management and navigation.
• 1. ls - Lists files and directories in the current directory. Example: 'ls -l' for detailed listing.

• 2. cd - Changes the current directory. Example: 'cd /home/user' to navigate to the user's home directory.

• 3. cp - Copies files or directories. Example: 'cp file.txt /backup/' to copy file.txt to the backup directory.

• 4. mv - Moves or renames files or d...read more
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Q10. What is the difference between TCP and UDP?
Ans. 
TCP is connection-oriented and reliable, while UDP is connectionless and faster but less reliable.
• TCP ensures data delivery through acknowledgments and retransmissions.

• UDP does not guarantee delivery, order, or error correction.

• TCP is used for applications like web browsing (HTTP) and email (SMTP).

• UDP is used for applications like video streaming (YouTube) and online gaming.
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Q1. Self introduction
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Q2. Difference between SDLC and stlc
Ans. 
SDLC is the Software Development Life Cycle, while STLC is the Software Testing Life Cycle.
• SDLC focuses on the development of software from planning to deployment, while STLC focuses on the testing activities within the SDLC.

• SDLC includes phases like requirements gathering, design, coding, testing, and deployment, while STLC includes phases like test planning, test design, test execution, and test closure.

• SDLC is more ...read more
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Q3. Regression testing
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Q4. What do you mean data query language and data definition language?
Ans. 
Data query language is used to retrieve data from a database, while data definition language is used to define and modify the structure of a database.
• Data query language (DQL) is used to retrieve data from a database, such as SQL SELECT statement.

• Data definition language (DDL) is used to define and modify the structure of a database, such as SQL CREATE TABLE statement.

• DQL focuses on querying and retrieving data, while ...read more
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Aptitude and reasoning

Q1. Java and android basic
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Q1. Java and android basics
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Q1. Communication and salary discussion
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