CS 1: Big Idea #3 Practice

Which concept involves assigning a value to a variable in programming?

• Data Abstraction

• Variable Assignment

• Binary Searches

• Iteration - loop

Answer explanation

Variable Assignment is the concept of assigning a value to a variable in programming. It allows you to store data that can be used and manipulated throughout your code.

Which of the following is used to perform calculations in programming?

• Boolean Expressions

• Mathematical Expressions

• Developing Algorithms

• Conditionals - selection

Answer explanation

Mathematical Expressions are used to perform calculations in programming, allowing for operations like addition, subtraction, multiplication, and division. Other options like Boolean Expressions and Conditionals do not perform calculations.

What is a sequence of characters used in programming known as?

• Lists

• Strings

• Iteration - loop

• Binary Searches

Answer explanation

In programming, a sequence of characters is called a 'string'. Strings are used to represent text and can include letters, numbers, and symbols, making 'Strings' the correct answer among the options provided.

Which concept involves making decisions based on conditions in programming?

• Iteration - loop

• Boolean Expressions

• Conditionals - selection

• Calling Procedures

Answer explanation

Conditionals, or selection statements, allow programmers to make decisions based on specific conditions. They enable the execution of different code paths depending on whether a condition evaluates to true or false.

What is the process of finding a specific item in a sorted list by repeatedly dividing the search interval in half?

• Linear Search

• Binary Search

• Modulus

• Traverse

Answer explanation

The process described is known as Binary Search. It efficiently finds a specific item in a sorted list by dividing the search interval in half, allowing for faster searches compared to Linear Search.

Which term refers to a sequence of instructions that solve a problem or perform a task?

• Abstraction

• Debugging

• Algorithm

• Index

Answer explanation

An algorithm is a sequence of instructions designed to solve a problem or perform a task. It is a fundamental concept in computer science, distinguishing it from terms like abstraction, debugging, and index.

What is the term for a data type that can hold one of two possible values, typically true or false?

• String

• Boolean values

• List

• Variable

Answer explanation

The term for a data type that can hold one of two possible values, typically true or false, is 'Boolean values'. This distinguishes it from other types like String, List, or Variable, which can hold more complex data.

What is the process of combining two or more strings into one?

• Concatenation

• Modulus

• Sequence

• Procedure Call

Answer explanation

The process of combining two or more strings into one is called concatenation. This operation joins the strings end-to-end, creating a single string from multiple inputs.

Which term describes something that repeats a set of instructions until a specific condition is met?

• Index

• Loop (iteration)

• Traverse

• Pseudocode

Answer explanation

A 'Loop (iteration)' is a programming construct that repeats a set of instructions until a specified condition is met, making it the correct term for this concept.

What are variables in a program?

• Fixed values that never change

• Placeholders for values that a program needs

• Only used for textual expressions

• Only used for mathematical expressions

Answer explanation

Variables are placeholders for values that a program needs, allowing for dynamic data storage and manipulation. They can hold different types of data, making them essential for both textual and mathematical expressions.