Java Software Developer Interview Questions

4,193 java software developer interview questions shared by candidates

OOPs, JDK,JRE,JVM, Exception handling, Collections - Arraylist vs linkedlist, internal working of hashmap, Vector, treeset, anonymous inner class, try with resources, core java concepts like static, final, main method related questions, Hibernate & Spring concepts, questions based on your resume
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Software Engineer - Java Developer

Interviewed at Techforce Infotech

4.2
Jul 6, 2021

OOPs, JDK,JRE,JVM, Exception handling, Collections - Arraylist vs linkedlist, internal working of hashmap, Vector, treeset, anonymous inner class, try with resources, core java concepts like static, final, main method related questions, Hibernate & Spring concepts, questions based on your resume

Java ==== explain your project. what is JVM ? what is JRE ? what is JDK ? difference between method overloading and method overriding ? difference between String literal and String object ? Difference between comaparable and comparator ? Difference between hashmap and hashtable ? what is SCP ?(String constant pool) declear HashMap. what is output follwoing code ? String s= new String("Shrishail"); String s1= new String("Shrishail"); System.out.println(s==s1); // flase - because in string assignment operator is check address location not contains. String s="Shrishail"; String s1="Shrishail"; System.out.println(s==s1); // true write one program using Comparator ? write one code String input ="Shrishail is my name"; Output = name my is Shrishail Adavance java ============= steup for jdbc what resultset ? difference between statement and Preparedstatement which one better statement or PreparedStatement. what is Statement ? what is PreparedStatement ? Sql === write query employee table where department is Developing write query for second maximum salary; what are type of aggregate function.
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Software Engineer - Java Developer

Interviewed at Suma Soft

3.6
May 11, 2023

Java ==== explain your project. what is JVM ? what is JRE ? what is JDK ? difference between method overloading and method overriding ? difference between String literal and String object ? Difference between comaparable and comparator ? Difference between hashmap and hashtable ? what is SCP ?(String constant pool) declear HashMap. what is output follwoing code ? String s= new String("Shrishail"); String s1= new String("Shrishail"); System.out.println(s==s1); // flase - because in string assignment operator is check address location not contains. String s="Shrishail"; String s1="Shrishail"; System.out.println(s==s1); // true write one program using Comparator ? write one code String input ="Shrishail is my name"; Output = name my is Shrishail Adavance java ============= steup for jdbc what resultset ? difference between statement and Preparedstatement which one better statement or PreparedStatement. what is Statement ? what is PreparedStatement ? Sql === write query employee table where department is Developing write query for second maximum salary; what are type of aggregate function.

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