Odisha Computer Application Centre (OCAC) System Support Engineer Interview Questions and Answers

Use a loop to iterate through the list and compare each element with the target element

• Iterate through the list using a loop

• Compare each element with the target element

• Return the element if found, otherwise return null

A logger class to handle logging messages in an application

• Create a Logger class with methods like logInfo, logError, logWarning, etc.

• Use a file or database to store the log messages

• Include timestamp and severity level in each log message

• Implement log rotation to manage log file size

RAII is a resource management technique in C++. Rule of 3/5 refers to special member functions. Smart pointers are objects that manage memory automatically.

• RAII stands for Resource Acquisition Is Initialization, a C++ programming technique where resource management is tied to object lifetime.

• Rule of 3 states that if a class defines a custom destructor, copy constructor, or copy assignment operator, it should define all...read more

A pointer to pointer is a variable that stores the memory address of another pointer variable.

• It is used to create dynamic data structures like linked lists and trees.

• It allows multiple levels of indirection.

• It is denoted by ** in C and C++.

• Example: int **ptr;

• Example: ptr = &p; where p is a pointer variable.

Main principles of Java include object-oriented programming, platform independence, and automatic memory management.

• Object-oriented programming: Java is based on classes and objects, allowing for encapsulation, inheritance, and polymorphism.

• Platform independence: Java code can run on any platform that has a Java Virtual Machine (JVM) installed.

• Automatic memory management: Java uses garbage collection to automatically m

The == operator compares the memory addresses of two objects, while the equals method compares the content of two objects.

• The == operator is used to compare the memory addresses of two objects in Java.

• The equals method is used to compare the content of two objects in Java.

• Example: String str1 = new String("hello"); String str2 = new String("hello"); str1 == str2 will return false, but str1.equals(str2) will return true