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Q Which organization is responsible for managing IP address allocation?
public static void main(String[] args) {
System.out.println(10 + 20 + "30" + 40 + 50);
}
Output ⬇️
𝗤. 𝗪𝗵𝗮𝘁 𝗶𝘀 𝗗𝗲𝗯𝘂𝗴𝗴𝗶𝗻𝗴 𝗶𝗻 𝗝𝗮𝘃𝗮?
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Debugging in Java involves identifying and fixing bugs in the code.
⏺ 𝗟𝗼𝗴𝗴𝗶𝗻𝗴: Use System.out.println() or logging frameworks like Log4j.
⏺ 𝗗𝗲𝗯𝘂𝗴𝗴𝗶𝗻𝗴 𝗧𝗼𝗼𝗹𝘀 𝗶𝗻 𝗜𝗗𝗘𝘀: Utilize features in IntelliJ IDEA, Eclipse, NetBeans.
• 𝐁𝐫𝐞𝐚𝐤𝐩𝐨𝐢𝐧𝐭𝐬: Pause code execution at specific points.
• 𝐒𝐭𝐞𝐩 𝐈𝐧, 𝐒𝐭𝐞𝐩 𝐎𝐯𝐞𝐫, 𝐒𝐭𝐞𝐩 𝐎𝐮𝐭: Navigate code execution line-by-line.
• 𝐕𝐚𝐫𝐢𝐚𝐛𝐥𝐞 𝐈𝐧𝐬𝐩𝐞𝐜𝐭𝐢𝐨𝐧: Check current values of variables during execution.
⏺ 𝗨𝗻𝗶𝘁 𝗧𝗲𝘀𝘁𝗶𝗻𝗴: Use JUnit to test individual code units to ensure correctness.
⏺ 𝗘𝘅𝗰𝗲𝗽𝘁𝗶𝗼𝗻 𝗛𝗮𝗻𝗱𝗹𝗶𝗻𝗴: Use try-catch blocks to catch and manage errors.
⏺ 𝗖𝗼𝗱𝗲 𝗥𝗲𝘃𝗶𝗲𝘄𝘀: Have peers review your code to find unnoticed bugs.
⏺ 𝗩𝗲𝗿𝘀𝗶𝗼𝗻 𝗖𝗼𝗻𝘁𝗿𝗼𝗹: Use Git to track and compare code changes over time.
Practice and experience enhance debugging skills.
𝗳𝗶𝗻𝗮𝗹 𝗸𝗲𝘆𝘄𝗼𝗿𝗱
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⏺ 𝘃𝗮𝗿𝗶𝗮𝗯𝗹𝗲 (can’t change, constant)
⏺ 𝗺𝗲𝘁𝗵𝗼𝗱(can’t override)
⏺ 𝗰𝗹𝗮𝘀𝘀 (can’t inherit)
𝗦𝘁𝗮𝘁𝗶𝗰 𝗸𝗲𝘆𝘄𝗼𝗿𝗱
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𝗦𝘁𝗮𝘁𝗶𝗰 𝗩𝗮𝗿𝗶𝗮𝗯𝗹𝗲 : belong to class and get memory only once in class area at the time of class loading.
𝗦𝘁𝗮𝘁𝗶𝗰 𝗠𝗲𝘁𝗵𝗼𝗱 : belong to class, cant use non static variables and methods inside if it is not 𝗸𝗻𝗼𝘄𝗻
𝗦𝘁𝗮𝘁𝗶𝗰 𝗕𝗹𝗼𝗰𝗸 : initialize static variables and executed before main method at the time of class loading.
𝗦𝘁𝗮𝘁𝗶𝗰 𝗜𝗺𝗽𝗼𝗿𝘁 : access any static member of a class directly. There is no need to qualify it by the class name in program.
Which protocol is primary used to secure communication between a web browser and a server?
Top coding interview questions ⬇️
𝗪𝗵𝗮𝘁 𝗶𝘀 𝘁𝗵𝗲 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝗰𝗲 𝗯𝗲𝘁𝘄𝗲𝗲𝗻 𝗮𝗻 𝗶𝗻𝘀𝘁𝗮𝗻𝗰𝗲 𝗺𝗲𝘁𝗵𝗼𝗱 𝗮𝗻𝗱 𝗮 𝘀𝘁𝗮𝘁𝗶𝗰 𝗺𝗲𝘁𝗵𝗼𝗱?
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An instance method operates on an instance of a class and can access instance variables and methods. A static method belongs to the class itself and can only access static variables and methods.
𝗘𝘅𝗽𝗹𝗮𝗶𝗻 𝘁𝗵𝗲 𝗰𝗼𝗻𝗰𝗲𝗽𝘁 𝗼𝗳 𝗶𝗻𝗵𝗲𝗿𝗶𝘁𝗮𝗻𝗰𝗲.
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Inheritance is a mechanism in object-oriented programming where one class inherits properties and behaviors from another class. The class being inherited from is called the superclass or base class, while the class inheriting is called the subclass or derived class. Inheritance allows for code reuse and promotes code organization.
