Java Programming: Arrays and Collections

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What is the primary advantage of using an array in Java?

It enables the storage of multiple elements of the same type under a single variable (correct)
It allows for dynamic memory allocation
It supports the implementation of recursive data structures
It is a structure that automatically resizes itself

What is a limitation of using arrays in Java?

It requires a fixed size declaration before use (correct)
It is a dynamic structure that can be resized at runtime
It is a data structure that is only used in Java
It can only store elements of primitive data types

What is the purpose of the 'new' keyword when initializing an array?

It is used to specify the size of the array
It is used to specify the data type of the array
It is used to allocate memory for the array (correct)
It is used to initialize the array elements

What is the term for initializing an array with values at compile-time?

Static initialization (A) Signup and view all the answers

What is the syntax for declaring a one-dimensional array in Java?

All of the above (D) Signup and view all the answers

What is a disadvantage of inserting or deleting elements in an array?

It is difficult because elements are stored at contiguous memory locations (D) Signup and view all the answers

Who developed the first working version of Java?

James Gosling, Patrick Naughton, Chris Warth, Ed Frank, and Mike Sheridan (C) Signup and view all the answers

What is the purpose of the Java language specification?

To provide a technical definition of the Java programming language's syntax and semantics (C) Signup and view all the answers

What is the difference between Java SE and Java EE?

Java SE is for Client-side programming, while Java EE is for Server-side programming (D) Signup and view all the answers

What is the purpose of the JDK?

To provide a set of separate programs for developing and testing Java programs (B) Signup and view all the answers

What is the purpose of an IDE?

To provide a graphical user interface for developing Java programs quickly (D) Signup and view all the answers

What is encapsulation in Java?

A mechanism of wrapping the data and code acting on the data together as a single unit (A) Signup and view all the answers

What is the purpose of the modulus operator in Java?

To return the division remainder (C) Signup and view all the answers

What is the effect of the increment operator (++) in Java?

Increases the value of a variable by 1 (C) Signup and view all the answers

What is the purpose of the ternary operator in Java?

To evaluate a conditional expression and return one of two values (A) Signup and view all the answers

What is the purpose of the &= operator in Java?

To perform bitwise AND operation (D) Signup and view all the answers

What is the purpose of the >>> operator in Java?

To perform bitwise right shift with zero-fill (B) Signup and view all the answers

What is the operator precedence of the postfix expr++ and expr-- operators in Java?

Highest precedence (D) Signup and view all the answers

What is the function of the 'if' statement in Java?

It tests the condition and executes the block of code if the condition is true (C) Signup and view all the answers

What does the 'next()' method in the Scanner class do?

Reads a word (B) Signup and view all the answers

In what order does the JVM execute the code?

static block, static methods, main() method, instance methods (B) Signup and view all the answers

What is the purpose of setting the path in Java?

To specify the location of the JDK (C) Signup and view all the answers

What is the purpose of the 'nextByte()' method in the Scanner class?

Reads an integer of the byte type (B) Signup and view all the answers

What is the purpose of the 'parseByte()' method in the Byte wrapper class?

It converts a string to a byte (C) Signup and view all the answers

How many data types are there in Java, categorized into four groups?

8 (or elemental) types (C) Signup and view all the answers

What is the size of the 'int' data type in Java?

4 bytes (D) Signup and view all the answers

What is the purpose of the 'nextLine()' method in the Scanner class?

Reads a whole line (B) Signup and view all the answers

What is the function of the relational operator '<' in Java?

It checks if the first value is less than the second value (B) Signup and view all the answers

What is the range of values that can be stored in a 'byte' data type?

-128 to 127 (B) Signup and view all the answers

How many decimal digits can be stored in a 'float' data type?

6-7 (A) Signup and view all the answers

What is the purpose of the break statement in a switch statement?

To exit the switch statement and continue with the rest of the program (D) Signup and view all the answers

What types can be used in a switch statement?

byte, short, int, long, enum, and String (C) Signup and view all the answers

What is the purpose of an if-else-if ladder?

To check multiple conditions and execute different statements (B) Signup and view all the answers

What is the purpose of iteration statements in Java?

To repeat the execution of a set of statements until a condition is met (C) Signup and view all the answers

What is the default case in a switch statement?

The case that is executed when all other cases are not matched (D) Signup and view all the answers

What is the purpose of the else statement in an if-else statement?

To execute a statement when all conditions are false (C) Signup and view all the answers