Practice Data Types And Variables (7.2) - Variables and Expressions

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10 questions

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Exercise
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4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a variable?
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Think about storage spaces in a program.
Question 2.
Name one primitive data type.
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Remember the types that hold simple data.
3Question 3.
What is the size of an int data type in Java?
- 8 bits
- 16 bits
- 32 bits
- 64 bits
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Think about how many bits in common integer types.
4Question 4.
True or False: A variable can hold only one data type during its lifetime.
- True
- False
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Remember the rules of variable declaration.
Question 5.
Imagine you're storing information for a school. Create a variable for a student's name using a string and a variable for their age using an integer. Provide the declarations.
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Remember to use the correct data types for names and ages.
Question 6.
Consider a scenario where you need to store a high-precision measurement, like the temperature of a chemical reaction. Which data type would you choose to declare this variable and why?
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Reflect on types that can store decimal values.

6 more questions in this section. Enroll free to practise them all.