Top Application Support Interview Questions and Answers for 2023 - IQCode

Tips for Being a Good Application Support Engineer

In today's fast-paced world of information technology, providing software application support and maintenance demands extra care and attention. The primary goal of application support is to ensure seamless operation of both the software application and its associated systems. This involves updating, modifying, and reevaluating applications to guarantee all service-level objectives are met. The role of the application support engineer is critical to any organization as they are responsible for monitoring systems, checking users' requests/issues, debugging software, installing updates, enhancing existing procedures, and optimizing application performance.


The interview process may differ depending on the job profile. As application support is a crucial job role, it is essential to go through the most commonly asked questions in interviews before attending one. This article lists the most frequently asked questions based on real interview experiences to provide valuable insight.


Application support is an IT service designed to ensure an organization's daily operations run smoothly by enabling users to carry out their duties. Regular maintenance and IT support are necessary for all runtime services provided to users. Application support involves maintaining software applications and systems deployed at the customer's end of an organization. The aim of application support services is to ensure uninterrupted operation, availability, and evolution of applications.

The goal is to find and fix bugs in the application, as well as improve its performance consistently by updating, modifying, and re-evaluating. Technical support deals with maintaining the application, software, or other technological systems of an organization, while human support assists end-users in understanding the system and resolving any issues.


1. What is an Application Support Engineer?

Role of an Application Support Engineer or Specialist

An Application Support Engineer or Specialist is responsible for maintaining the software applications used by a company or organization. They provide technical support to end-users and act as a liaison between the development team and the users. They ensure that the software systems run smoothly, troubleshoot issues, and provide solutions. The Application Support Engineer or Specialist also collaborates with different teams to enhance the overall performance of the application, update the software when required, and develop new features to improve the user experience. They are also responsible for documenting and reporting application related issues.

Skills Required for an Application Support Engineer

Being an application support engineer requires a combination of technical and soft skills. Some of the key technical skills include:

- Strong knowledge of the programming languages used in the application
- Familiarity with operating systems, databases, and networking protocols
- Proficiency in troubleshooting and problem-solving
- Ability to manage and prioritize multiple tasks efficiently

Some of the soft skills that are essential for this role include:

- Excellent communication skills to interact with users, developers, and other stakeholders
- Customer service orientation to provide top-notch support to users
- Attention to detail to ensure accuracy and completeness of the documentation
- Flexibility and adaptability to deal with changing environments and new technologies

Overall, being an application support engineer requires a diverse skill set to ensure the smooth functioning of complex software applications.

Required Mindset and Strategies for this Role

To excel in this role, it is important to have a growth-oriented mindset and the ability to think creatively. As an API developer, you should be familiar with the latest trends in API development and have a deep understanding of the principles and best practices behind it.

Other key strategies that are important for success in this role include:

  • Strong problem-solving skills
  • Ability to work independently and in a team
  • Excellent communication skills
  • Attention to detail
  • Continuous lifelong learning to keep up-to-date with the latest technologies and trends in API development

As an Application Support Engineer, what should be your top priority?

As an Application Support Engineer, the most important thing to focus on is ensuring that the application is running smoothly and effectively for the end-users. This includes troubleshooting any issues that arise, implementing updates and fixes, and providing timely support to users who need help. It is also important to maintain clear communication with other team members and stakeholders to ensure everyone is on the same page and working towards the same goals. Overall, the primary responsibility is to ensure that the application is continuously delivering value to its users.

Challenges Faced by Application Support Professionals

Application support professionals face various challenges while providing support to end-users or clients. Some of the common challenges are:

- Resolving technical issues within a tight timeframe

- Understanding complex applications and their functionalities

- Communicating technical details to non-technical users

- Managing a large volume of support requests

- Keeping up with the constantly evolving technology and updating knowledge base

- Handling challenging clients or end-users

To tackle these challenges, application support professionals need to possess strong technical skills, effective communication skills, and the ability to work well under pressure. They should also be proactive and adaptable to new technologies and should constantly strive to update their knowledge base.

Fixing or Troubleshooting a Crashing Application

When an application is crashing, there can be several reasons for it. Here's what you can do to fix or troubleshoot it:

1. Check for updates: Check if there are any updates available for the application, and update it to the latest version.

2. Restart the application: Sometimes, simply restarting the application can fix the issue.

3. Restart your device: Restart your device and then try opening the application again.

4. Clear cache and data: Clear the cache and data of the application from the app settings.

5. Check for conflicting applications: Check if there are any conflicting applications that might be causing the crash.

6. Uninstall and reinstall: If nothing else works, try uninstalling and then reinstalling the application.

7. Contact the developer: If the issue persists, you can contact the developer of the application for further assistance.

Remember to always check for software updates and reboot your device first before diving into other troubleshooting steps.

Difference between VARCHAR and VARCHAR2 Datatypes

In Oracle databases, both VARCHAR and VARCHAR2 are variable-length character datatypes. However, there are some differences between them:

1. VARCHAR2 is the recommended datatype to use for any new character data in Oracle databases. VARCHAR is outdated and may not be supported in future versions of Oracle.

2. When defining a VARCHAR column, you must also specify the maximum length of the data in bytes, while VARCHAR2 only requires you to specify the maximum length of the data in characters.

3. In VARCHAR, trailing spaces are not removed while in VARCHAR2, trailing spaces are removed by default.

4. VARCHAR2 is generally more efficient in terms of storage and performance than VARCHAR.

Therefore, it is recommended to use VARCHAR2 instead of VARCHAR in Oracle databases.

Finding Current User Information in Linux/Unix

To find the current user information in Linux/Unix, you can use the "whoami" command. This command will display the current username of the user who is currently logged in.

Alternatively, you can also use the "id" command which provides additional information about the current user, such as the user ID and group ID.H3 tag: Command to show current working directory

The command that can be used to show the current working directory is "pwd" (without the quotes). It stands for "print working directory". When this command is executed in the terminal, it will display the full path name of the current working directory. This can be useful to know when navigating through the file system or running commands that require a specific file path.

Checking if a directory exists in a shell script on Unix/Linux

In a shell script on Unix/Linux, you can check if a directory exists using the `-d` option with an if statement. Here is an example:

if [ -d "/path/to/directory" ]; then
    echo "Directory exists."
    echo "Directory does not exist."

In this code, replace "/path/to/directory" with the actual path to your directory. If the directory exists, the script will output "Directory exists." Otherwise, it will output "Directory does not exist."

Troubleshooting Steps for an Application that is Down

If an application is down, the following steps can be taken to troubleshoot and resolve the issue:

1. Check the server logs to see if there is an error message or stack trace that could indicate the cause of the issue.

2. Check if there are any network connectivity issues that are preventing the application from being accessed.

3. Check if the database is down, as this could cause the application to crash. 

4. Check if any recent changes have been made to the application code, infrastructure, or systems, and if they could be causing the issue.

5. Restart the application server to see if this resolves the issue. 

6. If none of the above steps resolves the issue, escalate the problem to a higher-level support team or vendor for further investigation.

Interview Question for Experienced Application Support Engineer: Describe your Daily Routine

As an experienced Application Support Engineer, my daily routine typically involves working with a team of professionals responsible for ensuring the smooth functioning of enterprise applications. The day starts with reviewing and managing support tickets and prioritizing them based on severity and impact on the business.

Once I have assessed the urgency of each ticket, I start working on resolving the issues. This might involve troubleshooting, identifying bugs, and providing appropriate solutions where possible. I also collaborate with developers to provide product support, testing, and implementing fixes.

I constantly monitor the performance of applications, identify recurring issues, and work towards permanent resolutions to minimize future escalations. Additionally, I provide regular updates to stakeholders, including a summary of completed tasks, status of unresolved issues, and recommendations for improvements.

I also spend time learning and keeping up with new technologies and trends to ensure that I remain up-to-date with the latest industry standards. This enables me to identify potential areas of improvement and propose more efficient solutions to enhance system performance.

In summary, my daily routine revolves around managing support tickets, resolving issues, collaborating with development teams, monitoring application performance, providing updates to stakeholders, and staying abreast of latest industry trends.

Tools Used by Application Support Specialists

As an application support specialist, I use various tools to effectively perform my duties, such as:

1. Incident Management Tools: These tools help me track and manage incidents reported by end-users when they encounter issues with the applications they use.

2. Monitoring and Alerting Tools: These tools allow me to monitor the performance of applications and receive alerts when issues arise.

3. Troubleshooting Tools: These tools assist me in diagnosing and resolving issues experienced by end-users with the applications they use.

4. Collaboration Tools: These tools enable me to work collaboratively with other members of the IT team to resolve issues and enhance the functionality of applications.

5. Documentation Tools: These tools help me to document the steps taken in resolving issues and keep track of the changes made to the applications.

In conclusion, the use of the right tools is essential for application support specialists to ensure the smooth functioning of the applications used by end-users and provide quick and efficient solutions to any issues that may arise.

Representing Comments in Oracle

In Oracle, you can represent comments in two ways:

  1. Single-Line Comments: These are represented by two hyphens (--), followed by the comment text.
  2. Multi-Line Comments: These are represented by /* to start the comment block and */ to end the comment block.

Here is an example of how to use both types of comments in Oracle SQL:

-- This is a single-line comment

This is a
multi-line comment

Comments can be used to document your code and help other developers understand what your code is doing. It is best to use comments sparingly and only when necessary.

Importance of Unix in an Application Support Job

Unix is a highly important tool for professionals working in the field of application support. Here are some reasons why:

1. Many servers and applications in the enterprise world run on Unix-based operating systems such as Linux and macOS. Therefore, having a solid understanding of Unix is necessary for supporting and troubleshooting these systems.

2. Unix provides powerful command-line tools that can be used to perform tasks such as file manipulation, text editing, and process management. These tools can be combined to create scripts and automate processes, saving time and increasing efficiency.

3. Unix-based systems are highly customizable, allowing for the creation of unique solutions tailored to the needs of the organization. This provides application support engineers with the flexibility to solve complex problems in creative ways.

4. Understanding Unix is also important for security purposes. Many security tools and protocols are Unix-based, so application support professionals need to be familiar with Unix to properly configure and maintain these tools.

Overall, having a strong foundation in Unix is crucial for application support professionals to effectively support and maintain enterprise systems and applications.

Deleting Multiple Files Simultaneously in Unix

Yes, it is possible to delete multiple files at the same time in Unix using the "rm" command. To do this, you can provide the names of all the files that you want to delete separated by a space, for example:

rm file1.txt file2.txt file3.txt

Alternatively, you can use a wildcard character to delete files that match a certain pattern. For example, the following command will delete all files with a ".log" extension in the current directory:

rm *.log

However, be cautious when using the "rm" command as it permanently deletes files without any confirmation, and there is no way to recover them once they are gone. It is always a good practice to double-check the list of files you are about to delete before executing the command.

Explanation of (.) and (..) in Unix

In Unix, (.) refers to the current working directory, whereas (..) refers to the parent directory of the current working directory. They are also known as dot and dot-dot, respectively. These symbols are commonly used in Unix commands and scripts to navigate through directories and access files. For example, if the current working directory is /home/user/documents, then the command "cd .." will move up one directory level to /home/user. The command "ls ." will display the contents of the current working directory, while "ls .." will display the contents of the parent directory. Overall, understanding the use of (.) and (..) is important for efficient navigation and management of file systems in Unix.

Switching User Accounts in Unix

To switch from one user account to another in Unix, you can use the "su" command followed by the username of the account you want to switch to.

Here's an example:

su jane

This command will switch your current user account to the one named "jane". You will need to enter the password for the "jane" account in order to complete the switch.

Once you have switched to the new account, you can perform tasks or run commands as that user. To switch back to your original account, use the command "exit" or press Ctrl+D.

It's important to note that you must be authorized to switch to another user account, and you must have the correct password for that account.

Command to List Files or Folders in Alphabetical Order in Unix

In Unix, the "ls" command can be used to list files or folders in alphabetical order. By default, the output of the "ls" command is sorted alphabetically by file or folder name. To list the files or folders in reverse alphabetical order, the "-r" option can be added to the command:



This will list the files or folders in alphabetical order.


ls -r

This will list the files or folders in reverse alphabetical order.

My Approach to Handling Urgent Customer Issues

Whenever there’s an urgent issue at hand, I prioritize it immediately and make sure to communicate with the customer to let them know that their concerns are being addressed. I take a quick assessment of the situation to understand the problem, its impact, and the resources I need to resolve it.

If I can’t resolve the issue by myself, I escalate the problem to my supervisor or a more experienced team member so that it can be resolved quickly. Throughout the process, I communicate with everyone involved and provide regular updates on the progress of the resolution.

To ensure that I’m able to manage urgent issues on time, I have developed good time management skills. This involves prioritizing tasks and working efficiently and quickly. I also make sure to stay calm and focused during the entire process so that I can make sound decisions, even under pressure.

Dealing with Challenging Customer Requests

As a customer service representative, I followed these steps to handle difficult requests:

1. Listen attentively to the customer's concerns without interruption. 2. Sympathize with the customer and apologize for any inconvenience caused. 3. Clarify the request and ask for any additional information if needed. 4. If possible, offer a solution that meets the customer's needs. 5. If a solution is not immediately attainable, explain the steps I would take to resolve the issue and give the customer an estimated time frame. 6. Follow up with the customer after the resolution to ensure their satisfaction.

By being patient, empathetic, and proactive, I aim to provide a positive experience for even the most challenging customer requests.

Handling Multiple P1 Issues and their Resolution

In case of multiple P1 issues, it is important to prioritize and address them based on their severity and impact on the system.

To resolve a P1 issue, the team should follow these steps:

  1. Identify the root cause of the issue
  2. Determine the potential impact of the issue
  3. Create a plan to resolve the issue
  4. Implement the plan to resolve the issue
  5. Verify that the issue has been resolved
  6. Communicate the resolution to the stakeholders

If two P1 issues occur at the same time, the team should assess the severity and impact of both issues and prioritize them accordingly. The team should focus on resolving the issue that poses a greater risk to the system or has a higher impact on the users.

It is important to have a well-defined process in place for handling P1 issues and to ensure effective communication among the team members during the resolution process. This helps to minimize downtime and ensure that critical issues are resolved in a timely manner.

Understanding SQL JOIN Statements

SQL JOIN statements are used to combine rows from two or more tables based on a related column between them. It allows data to be retrieved from multiple tables in a single query.

What is the best approach to retrieve matching rows from two tables?

When two tables need to be compared to find matching rows, the most efficient way to do so is by using a JOIN statement. Specifically, you can use an INNER JOIN to retrieve only the matching rows between the two tables based on a specified condition.

For example:

SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column

In this query, "table1" and "table2" are the names of the two tables being compared, and "column" is the column that is used as the basis for the comparison. The SELECT statement with * retrieves all columns from the result set.

Using a JOIN statement ensures that the query runs efficiently and only retrieves the matching rows, rather than scanning both tables and filtering out matches afterwards.

Frequently Asked Questions

26. What is the role of an Application Support Engineer?

An Application Support Engineer is responsible for maintaining and supporting software applications within an organization. They work with developers and other IT professionals to ensure that applications are running smoothly and to troubleshoot any issues that arise. This may involve monitoring application performance, identifying and resolving bugs, and providing technical support to end-users.

// Sample code for an Application Support Engineer

class ApplicationSupportEngineer {
    void monitorApplicationPerformance();
    void identifyAndResolveBugs();
    void provideTechnicalSupport();

// Example usage of the class:
ApplicationSupportEngineer myEngineer;

Roles and Responsibilities of Application Support Engineers

Application Support Engineers are responsible for supporting the software applications used by an organization. Their roles and responsibilities include:

  • Monitoring and maintaining software applications to ensure they are running smoothly
  • Providing technical support to end-users to resolve issues related to the applications
  • Identifying and troubleshooting software application problems
  • Collaborating with developers to deploy software applications to production environments
  • Developing and maintaining technical documentation related to the applications
  • Managing and prioritizing support requests from end-users
  • Ensuring compliance with security and data privacy policies and regulations
  • Communicating effectively with stakeholders to provide updates on application status and issue resolution
  • Participating in the development and implementation of software application improvements and upgrades

Overall, Application Support Engineers play a critical role in ensuring the smooth operation and availability of software applications used by an organization.



Salary of an Application Support Engineer in India

As an AI language model, I do not have access to the latest salary data for Application Support Engineers in India. However, the salary can vary depending on various factors such as company, location, experience, and skillset. It is best to research current job openings and reach out to recruiters or hiring managers to get a better understanding of the salary range for this role.

What Does Application Support Include?

Application support typically includes assistance provided to users of a software application, either through a help desk or online support system. The assistance may involve resolving technical issues and errors, providing guidance on how to use features and functions, and troubleshooting user problems. Application support may also include software updates and maintenance to ensure the application functions properly and to address any security vulnerabilities. Additionally, application support may involve training materials and resources to help users become proficient with the software.

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