Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

How do you check if a string contains only numeric digits?

1135

Is it possible to cast an int value into a byte variable? What would happen if the value of int is larger than byte?

968

Differentiate between a constructor and a method? Can we mark constructors final?

1207

What is the difference between heap and stack memory?

1212

What do you understand by java?

1006

Explain 5 io best practices?

1049

What are the differences between throw and throws?

1084

What is the difference between jvm and jre? What is an interface?

1107

What is the numeric promotion?

1045

What is the multi-catch block in java?

1060

What are constants?

1067

Is java platform independent?

989

Can we have multiple classes in a single file?

997

What is the exception hierarchy in java?

980

What is constructor chaining in java?

1078

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Un-Answered Questions { Core Java }

Explain about doubly linked list

1049

Why scanner is used in java?

1091

What is stored procedure. How do you create stored procedure ?

1960

What about member inner classes?

1115

What is the string function?

968

Why spring singleton is not thread safe?

1015

What are the types of exceptions?

1069

What are methods and how are they defined?

1228

What is nested loop? What is dangling else condition in it?

1103

What are the major drawbacks of external iteration?

1077

What language is pass by reference?

1027

Can we sort list in java?

983

How do you do descending order in java?

977

What is garbage collection? Can it be forced to run?

1023

What is a protected void?

946

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