Al Ansari Exchange Software Engineer Interview Questions, Process, and Tips

Java program to print the occurrence count of a string

• Create a HashMap to store the count of each character in the string

• Iterate through the string and update the count in the HashMap

• Print the count of each character in the string

Use SQL query with DISTINCT keyword to remove duplicate records

• Use SELECT DISTINCT column1, column2, ... FROM table_name;

• Make sure to specify the columns you want to check for duplicates

• Example: SELECT DISTINCT name, age FROM students;

wait method is used for synchronization in Java, while sleep method is used to pause the execution of a thread.

• wait method is used for inter-thread communication and synchronization

• sleep method is used to pause the execution of a thread for a specified amount of time

• wait method must be called inside a synchronized block, while sleep method can be called anywhere

• wait method releases the lock on the object, while sleep m

Hashtable is synchronized and slower, while hashmap is not synchronized and faster.

• Hashtable is synchronized, while hashmap is not.

• Hashtable does not allow null keys or values, while hashmap allows one null key and multiple null values.

• Hashtable is thread-safe, while hashmap is not inherently thread-safe.

• Hashtable is slower than hashmap due to synchronization overhead.

• Example: Hashtable ht = new Hashtable(); HashMap hm

I am a software engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.

• 5 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills

• Experience working in Agile development environment

I thrive under pressure by staying organized, prioritizing tasks, and maintaining a positive attitude.

• I stay organized by creating a to-do list and breaking down tasks into smaller steps

• I prioritize tasks based on deadlines and importance

• I maintain a positive attitude by focusing on solutions rather than problems

• I communicate effectively with team members to delegate tasks and collaborate under pressure