Java primitives, reference types, operators, control flow, strings, arrays, type casting and wrapper classes. Excludes OOP, collections and streams.
40 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the smallest integer primitive type in Java?
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byte- How many bits does a double primitive occupy?
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64 bits- Which primitive stores true or false values?
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boolean- What is the range of values for a short primitive?
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-32768 to 32767- Which floating-point primitive has lower precision than double?
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float- What is the default value of an uninitialized boolean variable?
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false- Which primitive type holds a 16-bit Unicode character?
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char- What is the maximum value for an int primitive?
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2147483647- Is String a primitive or reference type in Java?
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reference type- Which class is the superclass of all classes in Java?
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Object- What does null represent in Java?
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absence of a value or no object reference- What is an array in Java?
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ordered collection of elements of the same type- What is the result of 17 % 5?
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2- Which operators compare two values and return a boolean?
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comparison operators (==, !=, <, >, <=, >=)- What does the && operator do?
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returns true only if both conditions are true
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