❌ A. It compiles without issue ❌ B. The code will produce a ClassCastException if called at runtime ❌ C. The code will not compile because of line 2 ❌ D. The code will not compile because of line 5 ✅ E. The code will not compile because of line 8 ❌ F. The code will not compile because of line 10
Explanation: First, the declarations of HasExoskeleton and Insect are correct and do not contain any errors, making options C and D incorrect. The concrete class Beetle extends Insect and inherits two abstract methods, getNumberOfSections() and getNumberOfLegs(). The Beetle class includes an overloaded version of getNumberOfSections() that takes an int value. The method declaration is valid, making option F incorrect, although it does not satisfy the abstract method requirement. For this reason, only one of the two abstract methods is properly overridden. The Beetle class therefore does not compile, and option E is correct. Since the code fails to compile, options A and B are incorrect.
❌ A. It compiles without issue ❌ B. The code will produce a ClassCastException if called at runtime ❌ C. The code will not compile because of line 2 ❌ D. The code will not compile because of line 5 ✅ E. The code will not compile because of line 8 ❌ F. The code will not compile because of line 10
Explanation: First, the declarations of HasExoskeleton and Insect are correct and do not contain any errors, making options C and D incorrect. The concrete class Beetle extends Insect and inherits two abstract methods, getNumberOfSections() and getNumberOfLegs(). The Beetle class includes an overloaded version of getNumberOfSections() that takes an int value. The method declaration is valid, making option F incorrect, although it does not satisfy the abstract method requirement. For this reason, only one of the two abstract methods is properly overridden. The Beetle class therefore does not compile, and option E is correct. Since the code fails to compile, options A and B are incorrect.
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Telegram has no known backdoors and, even though it is come in for criticism for using proprietary encryption methods instead of open-source ones, those have yet to be compromised. While no messaging app can guarantee a 100% impermeable defense against determined attackers, Telegram is vulnerabilities are few and either theoretical or based on spoof files fooling users into actively enabling an attack.
What Is Bitcoin?
Bitcoin is a decentralized digital currency that you can buy, sell and exchange directly, without an intermediary like a bank. Bitcoin’s creator, Satoshi Nakamoto, originally described the need for “an electronic payment system based on cryptographic proof instead of trust.” Each and every Bitcoin transaction that’s ever been made exists on a public ledger accessible to everyone, making transactions hard to reverse and difficult to fake. That’s by design: Core to their decentralized nature, Bitcoins aren’t backed by the government or any issuing institution, and there’s nothing to guarantee their value besides the proof baked in the heart of the system. “The reason why it’s worth money is simply because we, as people, decided it has value—same as gold,” says Anton Mozgovoy, co-founder & CEO of digital financial service company Holyheld.
