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Advanced Java- Full 3 Day

Across
Which Java keyword can you use to address problems of visibility?
What kind of operation is required to make data flow throw a Java Stream?
What is the keyword 'super' used to express in Java?
What is the default protection level in Java?
How many arguments does the Function interface take?
Which Java construct can you use to create a Singleton?
Down
What is the return type of the Predicate interface?
What is the return type of the 'filter' method of a Java Stream?
Which Java keyword can you use to ensure that a block of code is thread safe?
What is the return type of the findFirst method of a Stream?
By what name are interfaces with just one abstract method in Java 8+ referred to?
Which Java construct is used to create type safe collections?
What is the return type of BinaryOperator<Integer>?
Given the fully qualfied name of a class as a String, which method of java.lang.Class can be used to load that class into the JVM?
Which Java keyword is used to express Covariance?