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Questions and Answers
Which index does 'banana' have in the array var fruits = ['apple', 'banana', 'cherry', 'date']?
Which index does 'banana' have in the array var fruits = ['apple', 'banana', 'cherry', 'date']?
- 0
- 1 (correct)
- 2
- 3
What is the result of accessing an element in an array using its index directly?
What is the result of accessing an element in an array using its index directly?
- It changes all elements in the array to the accessed element.
- It adds a new element to the array at the accessed index.
- It displays the element at the accessed index. (correct)
- It deletes the element at the accessed index.
What is meant by JavaScript arrays being zero-indexed?
What is meant by JavaScript arrays being zero-indexed?
- The first element in the array has an index of 0. (correct)
- The first element in the array has an index of 1.
- The last element in the array has an index of 1.
- The last element in the array has an index of 0.
What does the push method do when used with arrays?
What does the push method do when used with arrays?
Which method removes the last element from an array in JavaScript?
Which method removes the last element from an array in JavaScript?
If an array has 5 elements, what is its length property value?
If an array has 5 elements, what is its length property value?
In the binary representation of a decimal number, where is the Most Significant Bit (MSB) located?
In the binary representation of a decimal number, where is the Most Significant Bit (MSB) located?
When converting decimal numbers to binary, what is the base of the number in binary form?
When converting decimal numbers to binary, what is the base of the number in binary form?
What is the binary equivalent of the decimal number 10?
What is the binary equivalent of the decimal number 10?
In the decimal to binary conversion process, what should be written first in the binary number?
In the decimal to binary conversion process, what should be written first in the binary number?
If a decimal number is 25, what would be its binary equivalent?
If a decimal number is 25, what would be its binary equivalent?
What does it mean when a decimal number is represented as 1101 in binary?
What does it mean when a decimal number is represented as 1101 in binary?
What is the purpose of using a graph in real-world problems?
What is the purpose of using a graph in real-world problems?
How are data structures beneficial in programming?
How are data structures beneficial in programming?
What is a 'List' in JavaScript commonly referred to as?
What is a 'List' in JavaScript commonly referred to as?
How are elements indexed in JavaScript arrays?
How are elements indexed in JavaScript arrays?
What does it mean when it is said that JavaScript arrays are zero-indexed?
What does it mean when it is said that JavaScript arrays are zero-indexed?
Which statement best describes the relationship between elements and indices in JavaScript arrays?
Which statement best describes the relationship between elements and indices in JavaScript arrays?
What is the purpose of a switch-case statement in programming?
What is the purpose of a switch-case statement in programming?
What happens if the break statement is not used inside a case block of a switch statement?
What happens if the break statement is not used inside a case block of a switch statement?
Which loop type is suitable when the number of iterations is known before entering the loop?
Which loop type is suitable when the number of iterations is known before entering the loop?
In a while loop, when is the condition/expression evaluated?
In a while loop, when is the condition/expression evaluated?
What distinguishes a for-loop from other loop types?
What distinguishes a for-loop from other loop types?
Which loop type is often referred to as a pre-test loop?
Which loop type is often referred to as a pre-test loop?
What is the defining principle of a stack data structure?
What is the defining principle of a stack data structure?
Which of the following is a type of stack data structure that allows dynamic resizing?
Which of the following is a type of stack data structure that allows dynamic resizing?
What happens if you try to add an element to a full fixed size stack?
What happens if you try to add an element to a full fixed size stack?
Which operation in a stack data structure is used to remove an element from the top of the stack?
Which operation in a stack data structure is used to remove an element from the top of the stack?
In a stack data structure, which operation returns the size of the stack?
In a stack data structure, which operation returns the size of the stack?
What principle does a queue data structure follow?
What principle does a queue data structure follow?
Study Notes
Array Indexing
- The index of 'banana' in the array
var fruits = ['apple', 'banana', 'cherry', 'date']
is 1. - In JavaScript, arrays are zero-indexed, meaning the first element is at index 0.
- Arrays are indexed from 0 to length - 1, where length is the number of elements in the array.
Array Methods
- The
push
method adds an element to the end of an array. - The method that removes the last element from an array in JavaScript is
pop
. - If an array has 5 elements, its
length
property value is 5.
Binary Representation
- In the binary representation of a decimal number, the Most Significant Bit (MSB) is located at the leftmost position.
- The base of the number in binary form is 2.
- The binary equivalent of the decimal number 10 is 1010.
- When converting decimal numbers to binary, the remainder of the division by 2 is written first in the binary number.
- The binary equivalent of the decimal number 25 is 11001.
- When a decimal number is represented as 1101 in binary, it means the number is equivalent to the sum of powers of 2: 12^3 + 12^2 + 02^1 + 12^0.
Data Structures and Programming Concepts
- A graph is used in real-world problems to model relationships between objects.
- Data structures are beneficial in programming because they provide efficient ways to store and manipulate data.
- In JavaScript, a 'List' is commonly referred to as an array.
- Elements in JavaScript arrays are indexed from 0 to length - 1.
- JavaScript arrays are zero-indexed, meaning the first element is at index 0.
- In JavaScript arrays, each element is associated with a unique index, and the index is used to access the element.
- The purpose of a switch-case statement is to execute different blocks of code based on the value of an expression.
- If the break statement is not used inside a case block of a switch statement, the code will continue executing into the next case block.
- The loop type suitable when the number of iterations is known before entering the loop is a for-loop.
- In a while loop, the condition/expression is evaluated before each iteration.
- A for-loop is distinguished from other loop types by its initialization, condition, and increment statements.
- A while-loop is often referred to as a pre-test loop.
- The defining principle of a stack data structure is Last-In-First-Out (LIFO).
- A dynamic array is a type of stack data structure that allows dynamic resizing.
- If you try to add an element to a full fixed-size stack, an error will occur.
- The operation in a stack data structure used to remove an element from the top of the stack is
pop
. - The operation in a stack data structure that returns the size of the stack is
size
. - A queue data structure follows the First-In-First-Out (FIFO) principle.
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Description
Learn how to convert a decimal number to binary by starting with the least significant bit at the top and the most significant bit at the bottom. Follow step-by-step instructions with an example to grasp the concept easily.