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Introduction to Computer and Java Programming Quiz

15 Questions

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Introduction to Computer and Java Programming Quiz

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Questions and Answers

What is the function of the central processing unit (CPU)?

Manipulating information (correct)

Measuring speed in megahertz

Displaying output on the console

Storing and retrieving data

Which component of a computer is considered the brain of the system?

Memory

Input devices

Central processing unit (CPU) (correct)

Storage devices

What does the CPU measure in terms of speed?

Data storage capacity

Communication bandwidth

Pulses per second (correct)

Information retrieval time

Which term refers to the ability of a computer to store, retrieve, and process data?

Memory Signup and view all the answers

What device retrieves instructions from memory and executes them?

Central processing unit (CPU) Signup and view all the answers

What is the purpose of declaring a variable with a specific data type?

To restrict the type of values that can be stored in the variable Signup and view all the answers

What is the significance of initializing a variable before use?

It ensures that the variable has a starting value Signup and view all the answers

Which statement accurately describes the concept of a variable in programming?

A variable is a reserved area in memory that can hold a value of a specific data type Signup and view all the answers

What is the purpose of casting the value of one type to another type in programming?

To convert the value to a different data type without losing precision Signup and view all the answers

What does it mean when a variable is said to be 'mutable'?

The variable's value can be changed after it has been assigned Signup and view all the answers

Which of the following is not a relational operator in Java?

!= Signup and view all the answers

What is the result of the comparison (10 >= 10) in Java?

true Signup and view all the answers

Which logical operator is used to combine two conditions such that both conditions must be true for the overall expression to be true?

&& Signup and view all the answers

What does the following expression evaluate to in Java: (5 < 3 && 2 > 1)?

false Signup and view all the answers

What is the purpose of the switch statement in Java?

To implement multi-way selection control based on the value of an expression Signup and view all the answers